JP2014029486A - Lens unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens unit for adaptation of a camera to capturing of a dot pattern and the like by being mounted to the camera.SOLUTION: A lens unit to be mounted to a camera of a smart phone or the like is configured to comprise: a cylindrical lens holder that has an upper opening and a lower opening to be mounted so as to surround an image capturing port provided on both ends, respectively; a lens that is arranged at a predetermined position inside the cylindrical lens holder; and an ID medium that is mounted on the upper opening for authentication. Further, a lens unit is configured to comprise: a cylindrical lens holder that has an upper opening and a lower opening to be mounted so as to surround the image capturing port provided on both ends, respectively; a lens that is arranged at a predetermined position inside the cylindrical lens holder; and an adjuster that is provided in the lower opening of the lens holder and accurately adjusts a distance from the lens to the camera.

Description

  The present invention relates to a lens unit that is detachably mounted so as to surround a photographing port of a camera, and a pattern in which an ID code that is one of information codes is encoded is photographed by the camera via the lens unit, and the camera The present invention relates to a technique that can be decrypted by an information processing apparatus equipped with.

  The present invention relates to a lens unit that is detachably mounted so as to surround a photographing port of a camera, and relates to a mechanism that can adjust a focal length and an ID that is one of information codes formed on an ID medium mounted on the lens unit. The present invention relates to a technique in which a code-encoded pattern is photographed with a subject through a lens unit together with a subject, and an ID code can be decoded by an information processing apparatus including the camera.

  Prior to the present application, a two-dimensional code that can be decoded by a camera to be decoded by a camera is known.

  As a representative two-dimensional code, a QR code (registered trademark; hereinafter omitted) is well known.

  Since the QR code has a problem that it impairs the aesthetics of the print medium, a method of coexisting with the original design of the print medium has been proposed.

  Patent Document 1, Patent Document 2, and Non-Patent Document 1 all disclose a technique for integrating an arbitrarily designed design with a QR code.

  However, even with the above prior art, the problem of providing a two-dimensional code that does not impair the aesthetics of the print medium has not been achieved, and the two-dimensional code coexists in a more natural form with respect to the original design of the print medium. Therefore, unlike a QR code, a “dot pattern”, which is a two-dimensional code that is almost invisible and can be printed over a design, has been invented and is well known in the art.

  The inventor of the present application has proposed various inventions using dot patterns such as Patent Document 3, Patent Document 4, and Patent Document 5.

  Further, Patent Document 5 prints a dot pattern with a K component, and prints a normal print area with a design with a CMY component, thereby extracting and reading only the dot pattern printed with the K component using infrared rays. An invention that enables it is disclosed.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a dot pattern reading method invention that enables a dot pattern and a normal print area to be optically discriminated in a visible light area.

JP2009-259192A JP 2009-230729 A International Publication No. 2004/029871 International Publication No. 2007/105819 International Publication No. 2006/040832 Original QR code “Design QR” (http://d-qr.net/)

  The first problem of the present invention is that cameras attached to smartphones, mobile phones, PCs, etc. are mainly intended for general photography, and are often not suitable for photography such as dot patterns. By mounting the lens unit, it is possible to provide a lens unit for adapting to shooting of a dot pattern or the like, and to appropriately adjust the distance from the lens provided in the lens unit to the camera.

  A second problem of the present invention is to photograph a lens ID at the same time as the subject at the time of photographing, identify the lens, and associate it with the image of the subject.

  A third subject of the present invention is to provide a lens unit suitable for photographing a predetermined subject photographed by a camera is a print medium on which a dot pattern encoded with an information code is printed. It is.

  A fourth problem of the present invention is to provide a lens unit suitable for photographing a part of a human body, for example, where a predetermined subject photographed by the camera is a part of the human body such as skin, scalp, hair, nails, eyes, etc. That is, correction is performed so that an image of a part of the human body can be acquired correctly.

  <1> The present invention is a lens unit that is attached to an information processing apparatus including a camera and an analysis unit that decodes an information code, and is a lower part that is detachably attached so as to surround a photographing port of the camera A cylindrical lens holder having an opening and an upper opening at both ends; a lens disposed at a predetermined position inside the cylindrical lens holder; and an upper opening of the lens holder, An opening or a transparent area necessary for photographing a subject is formed so that a pattern in which an ID code, which is one of the information codes for authentication in the analysis means, is encoded can be photographed by the camera. A lens unit.

  <2> Furthermore, it is preferable that the ID medium is attached by being stuck, fitted, or screwed into the upper opening of the lens holder.

  <3> Furthermore, it is preferable that the pattern in which the ID code is encoded is formed in the vicinity of the opening of the ID medium or the periphery of the transparent region.

  <4> Furthermore, the pattern is formed of a plurality of marks arranged on a circumference of a predetermined circle, a circumference of a predetermined ellipse, or a circumference of a predetermined closed curve based on a predetermined rule. It is preferable that the ID code is a circle pattern encoded according to the following rule.

  <5> Further, a pattern for making it easier to focus on the camera when the camera is photographed is printed near the periphery of the opening of the ID medium or near the center or the periphery of the transparent area of the ID medium. preferable. The lens unit according to claim 1.

  <6> Furthermore, it is preferable that the pattern is printed with a transparent ink.

  <7> Furthermore, it is preferable that the ID medium is integrally formed with the lens holder.

  <8> Furthermore, it is preferable that the lens unit further includes an infrared filter at a predetermined position.

  <9> Furthermore, it is preferable that the predetermined subject is photographed in contact with an upper opening of the lens holder.

  <10> It is preferable that the camera further includes a lens cover provided at an upper opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject.

  <11> Furthermore, it is preferable that the predetermined subject is photographed in contact with an upper opening of the lens holder or the lens cover.

  <12> Further, the ID medium is attached to the upper opening of the lens cover, fitted, screwed, or inserted between the lens cover and the lens holder. It is preferable that it is attached.

  <13> Furthermore, it is preferable that the lens cover is integrally formed with at least one of the lens holder and the ID medium.

  <14> Further, it is preferable that the lens unit further includes a slip stopper attached to a lower opening of the lens holder in order to be attached to the information processing apparatus.

  <15> Furthermore, it is preferable that the anti-slip is attached by being stuck, fitted, or screwed into the lower opening of the lens holder.

  <16> Furthermore, it is preferable that the anti-slip is integrally formed with the lens holder.

  <17> Further, an adjuster provided in a lower opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject, and adjusting the distance from the lens to the camera. It is preferable to further comprise.

  <18> Further, it is preferable that the lens unit further includes a pedestal for stably placing the predetermined subject around the outer peripheral wall of the upper opening of the lens holder.

  <19> Further, it is preferable that the pedestal is integrally molded with the lens holder.

  <20> Further, the pedestal and a lens cover provided in an upper opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject are integrally molded. preferable.

  <21> Further, the lens unit further includes a clip for fixing the lens unit to be attached to a camera connected to the information processing apparatus or an information processing apparatus incorporating the camera. It is preferable.

  <22> Further, the arm of the clip is formed so that one end is attached to the lens holder and the other end is inserted into the back side of the information processing apparatus provided with the camera. preferable.

  <23> Furthermore, it is preferable that one end of the arm of the clip attached to the lens holder is a ring-shaped or U-shaped fastener, and is attached to the fastener through the lens holder.

  <24> Further, in order to fix the clip fastener, it is preferable that a screw-like second fastener is attached through the lens holder.

  <25> Furthermore, it is preferable that an O-ring is attached between the clip fastener and the second fastener through the lens holder.

  <26> Further, it is preferable that the clip is integrally formed with at least one of the lens holder and the lens cover.

  <27> Further, when the clip is inserted into the back side of the information processing apparatus and the information processing apparatus is placed on a horizontal plane with the lens unit facing upward, a predetermined area of the clip is in contact with the horizontal plane. It is preferably designed to face.

  <28> On the other hand, the present invention is a lens unit that is mounted on an information processing apparatus including a camera and an analysis unit that decodes an information code, and is detachably mounted so as to surround the photographing port of the camera. A cylindrical lens holder having a lower opening and an upper opening at both ends, a lens disposed at a predetermined position inside the cylindrical lens holder, and a lower opening of the lens holder, The lens unit includes an adjuster that has an opening or a transparent area necessary for photographing the predetermined subject and appropriately adjusts the distance from the lens to the camera.

  <29> Further, one of the information codes which is attached to the upper opening of the lens holder and has an opening or a transparent area necessary for photographing a predetermined subject and is used for authentication by the analyzing means. It is preferable to further include an ID medium formed so that a pattern in which a certain ID code is encoded can be photographed by the camera.

  <30> Further, it is preferable that the ID medium is attached by being stuck, fitted, or screwed into the upper opening of the lens holder.

  <31> Furthermore, it is preferable that the pattern in which the ID code is encoded is formed in the vicinity of the opening of the ID medium or the periphery of the transparent region.

  <32> Further, the pattern is formed of a plurality of marks arranged on a circumference of a predetermined circle, a circumference of a predetermined ellipse, or a circumference of a predetermined closed curve based on a predetermined rule. It is preferable that the ID code is a circle pattern encoded according to the following rule.

  <33> Furthermore, a pattern is printed on the periphery of the opening of the ID medium or near the center or the periphery of the transparent area of the ID medium so that the camera can focus easily when shooting with the camera. preferable.

  <34> Furthermore, it is preferable that the pattern is printed with a transparent ink.

  <35> Furthermore, it is preferable that the ID medium is integrally formed with the lens holder.

  <36> Furthermore, it is preferable that the lens unit further includes an infrared filter at a predetermined position.

  <37> Further, it is preferable that the predetermined subject is photographed in contact with an upper opening of the lens holder.

  <38> It is preferable that a lens cover provided at an upper opening of the lens holder and having an opening or a transparent region necessary for photographing the predetermined subject is further provided.

  <39> Further, it is preferable that the predetermined subject is photographed in contact with an upper opening of the lens holder or the lens cover.

  <40> Furthermore, it is preferable that the lens unit further includes a slip stopper attached to a lower opening of the lens holder in order to be attached to the information processing apparatus.

  <41> Further, it is preferable that the anti-slip is attached by being stuck, fitted, or screwed into a lower opening of the lens holder.

  <42> Further, it is preferable that the anti-slip is integrally formed with the lens holder.

  <43> Further, the anti-slip is attached to the adjuster by being attached, fitted, screwed, or attached between the adjuster and the lens holder. It is preferred that

  <44> Further, it is preferable that the adjuster is integrally formed with at least one of the lens holder and the slip stopper.

  <45> Furthermore, it is preferable that the lens unit further includes a pedestal for stably placing the predetermined subject around the outer peripheral wall of the upper opening of the lens holder.

  <46> Further, it is preferable that the pedestal is integrally molded with the lens holder.

  <47> Further, the pedestal and a lens cover provided in an upper opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject are integrally molded. preferable.

  <48> Further, the lens unit further includes a clip for fixing the lens unit to be attached to a camera connected to the information processing apparatus or an information processing apparatus incorporating the camera. It is preferable.

  <49> Further, the arm of the clip is formed so that one end is attached to the lens holder and the other end is inserted into the back side of the information processing apparatus provided with the camera. preferable.

  <50> Furthermore, it is preferable that one end of the arm of the clip attached to the lens holder is a ring-shaped or U-shaped fastener, and is attached to the fastener through the lens holder.

  <51> Furthermore, in order to fix the clip fastener, it is preferable that a screw-like second fastener is attached through the lens holder.

  <52> Furthermore, it is preferable that an O-ring is attached through the lens holder between the clip fastener and the adjuster or the second fastener.

  <53> Furthermore, it is preferable that the clip is integrally formed with at least one of the lens holder, the lens cover, and the adjuster.

  <54> Furthermore, the lens holder is provided with a screw thread, and at least the adjuster of the pedestal, the lens cover, the second fastener, the clip, or the adjuster is detachable with a screw. It is preferable.

  <55> Further, when the clip is inserted into the back side of the information processing apparatus and the information processing apparatus is placed on the horizontal plane with the lens unit facing upward, the clip has a predetermined area in contact with the horizontal plane. It is preferably designed to face.

  <56> Furthermore, it is preferable that the camera is built in the information processing apparatus.

  <57> Furthermore, the camera is connected to the information processing apparatus by wire or wirelessly, and the information processing unit decodes the image of the predetermined subject and / or the information code decoded by the analysis unit. Preferably it is transmitted to the device.

  <58> Furthermore, it is preferable that the camera includes the analyzing means.

  <59> Furthermore, the predetermined subject is a print medium on which a dot pattern encoded with an information code is printed, and the analysis unit decodes the information code from the dot pattern photographed by the camera. It is preferable to do.

  <60> Furthermore, it is preferable that the lens holder is integrally formed with the lens.

  <61> Furthermore, the lens unit further includes a light source installed at a predetermined position on an outer peripheral wall of the lens holder so that the predetermined subject is substantially uniformly irradiated, and a power source for supplying power to the light source. It is preferable to include

  <62> Furthermore, it is preferable that the power is supplied from the information processing apparatus.

  <63> Furthermore, it is preferable that the information processing apparatus includes a storage unit that decodes an ID code photographed by the camera and records a photographed image of the predetermined subject in association with each other.

  <64> Further, the information processing apparatus includes a transmission unit that transmits a captured image of the predetermined subject associated with the ID code to the server together with the decrypted ID code recorded in the storage unit. It is preferable.

  <65> Further, it is preferable that the predetermined subject is a part of a human body.

  <66> Furthermore, the information processing apparatus is preferably a smartphone, a mobile phone, a camera-equipped PC, or a digital camera.

  According to the present invention, an ID code, which is one of the information codes, is encoded by detachably attaching a lens unit to a camera mainly intended for general photography such as a smartphone, a mobile phone, a PC, and the like. The obtained pattern can be photographed with a camera via a lens unit and decoded by an information processing apparatus equipped with the camera.

  Moreover, according to this invention, the distance from the lens with which the lens unit was provided to a camera can be adjusted appropriately.

  In addition, according to the present invention, even when a predetermined subject photographed by the camera is a print medium on which a dot pattern encoded with an information code is printed, a lens unit suitable for photographing the print medium is provided. it can.

  Further, according to the present invention, even when the predetermined subject to be photographed by the camera is a part of the human body such as skin, scalp, hair, nails, eyes, etc., the lens unit suitable for photographing the part of the human body Can be provided.

It is FIG. (1) which shows basic embodiment of this invention. It is FIG. (The 2) which shows basic embodiment of this invention. It is a figure which shows 1st Embodiment of the printing medium of this invention. It is a figure which shows 2nd Embodiment of the printing medium of this invention. It is a figure which shows 3rd Embodiment of the printing medium of this invention. It is a figure which shows embodiment of the icon of this invention. It is a figure which shows the method of the image processing in this invention. It is FIG. (1) which shows the specific example of arrangement | positioning of CMY in this invention. It is FIG. (2) which shows the specific example of arrangement | positioning of CMY in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows the method of the image processing in this invention. It is a figure which shows embodiment of the printing system of the image with a dot pattern of this invention. It is a figure which shows the lens unit of this invention. It is a figure which shows the lens unit of this invention. It is a figure which shows the lens unit of this invention. It is a figure which shows the lens unit of this invention. It is a figure which shows the lens unit of this invention. It is a figure which shows ID code added to the lens unit of this invention. It is a figure which shows the pattern added to the lens unit of this invention. It is a figure which shows the pattern added to the lens unit of this invention. It is a figure which shows the lens unit with an irradiation function of this invention. It is a figure which shows the lens unit with an irradiation function of this invention. It is a figure which shows the lens unit with an irradiation function of this invention. It is a figure which shows the lens unit with an irradiation function of this invention. It is a figure shown about the relationship between the wavelength of the filter etc. which are used for the camera of a mobile telephone, and the transmittance | permeability. It is a figure which shows the state which attached the lens unit of this invention to tablet type PC. It is a figure which shows the state which attached the lens unit of this invention to tablet type PC. It is a figure which shows the state which attached the lens unit of this invention to tablet type PC. It is a figure explaining reading the dot pattern provided in the card | curd using the lens unit of this invention. It is a figure explaining reading the dot pattern provided in the figure using the lens unit of the present invention. It is a figure which shows the figure provided with the lens unit of this invention. It is a figure explaining attaching a lens unit to a smart phone and reading a dot pattern provided in a card. It is a figure explaining attaching a lens unit to a smart phone and reading a dot pattern provided in a card. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a table | surface which shows allocation of the code value in the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a table | surface which shows allocation of the code value in the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the circle pattern of this invention. It is a figure which shows the lens unit on which ID code of this invention was printed. It is a figure which shows the lens unit with a clip of this invention. It is a figure which shows the ID medium with which the lens unit of this invention is mounted | worn. It is a figure shown about the adjuster provided in the lens unit of this invention. It is a figure shown about the adjuster and slipper provided in the lens unit of this invention. It is a figure shown about the adjuster and slipper provided in the lens unit of this invention. It is a figure shown about the adjuster provided in the lens unit of this invention. It is a figure shown about the clip provided in the lens unit of this invention. It is a figure shown about each structure of the lens unit of this invention. It is a figure shown about each structure of the lens unit of this invention. It is a figure which shows the lens unit provided with the base of this invention. It is a figure which shows the usage condition of the lens unit of this invention. FIG. 4 is a diagram in which light is strongly incident from the lower right side around the lens unit of the present invention. It is a circle dot pattern of the ID medium of the lens unit of the present invention. It is a definition of the numerical information of the information dot of the circle dot pattern of the lens unit of this invention.

  A mode for carrying out the present invention will be described.

<Dot pattern>
In the present invention, the “dot pattern” is an information code encoded by a plurality of dot arrangement algorithms.

  The dot pattern 101 is printed with the K component in any of the embodiments of the present invention. That is, only the dot pattern 101 is printed with the K component on the print medium.

  In a more preferred embodiment, the dot pattern 101 is printed with black K component. However, it is sufficient that the black color here is within a range that can be recognized by the CPU as black when the dot pattern 101 described later is read (that is, gray having a low brightness may be used).

  The dot pattern 101 may be printed in black (so-called composite black) using the CMY component without using the K component. The dot pattern 101 may be printed with one of the CMY components with high gradation, and the graphic may be printed with one of the other components. In that case, a component selected for dot pattern printing or a composite color of the component and a component selected for graphic printing may be read as dots. In addition, the graphic image area is composed of multiple partial areas, and each partial area uses one of the two components other than the one selected for dot pattern printing. The components may be different for each region. That is, the dot pattern can be read by reading only the component including one component selected for dot pattern printing. In addition, when performing dot recognition with one component selected for dot pattern printing or black mixed with three components, how do other components use two components other than the one component selected for dot pattern printing? Also good.

  As the encoding algorithm of the information code by the dot pattern, a well-known algorithm such as Grid Onput (registered trademark) by Gridmark, Anoto pattern by Anoto, or the like can be used.

  The encoding algorithm itself of the dot pattern 101 is common between the case of reading with visible light as in the present invention and the case of reading with infrared rays as in the known art.

  In addition to this, any dot pattern can be used as long as the dot pattern 101 is not visible or can be recognized as a simple pattern.

  The dot pattern 101 can encode different information codes depending on the reading position by defining coordinate values.

<Image area>
In the present invention, the “image area” means an area on which graphics, characters, pictograms, images, and photographs are printed.

  The graphics and characters in the image area 102 are printed by any one of the C component, M component, Y component, CM component, MY component, and CY component.

  “CM component” means the superposition of the C component and the M component, “MY component” means the superposition of the M component and the Y component, and “CY component” means the superposition of the C component and the Y component.

  Further, the image region 102 may include two or more partial regions printed by any one of the C component, M component, Y component, CM component, MY component, and CY component.

  However, if there is a portion where all the CMY components are superimposed in the image region 102, the portion may be erroneously recognized as a black dot when the dot pattern 101 is read. Therefore, as shown in FIG. 1 and FIG. 2, it is necessary to prevent the image area 102 from providing an area where all the CMY components overlap in any partial area.

<Print media>
In the present invention, the dot pattern 101 may be printed on the entire surface of the print medium 103 as shown in FIG. 3, or the dot pattern 101 may be superimposed and printed only on the image area 102 as shown in FIG. Also good. Although not shown, the dot pattern 101 in FIG. 3 may be printed not on the entire surface of the print medium 103 but on an arbitrary region.

  When the dot pattern 101 is superimposed and printed only on the image area 102, the dot pattern 101 may be printed on the entire image area 102 as shown in FIG. 4, or the image area 102 as shown in FIG. The dot pattern 101 may be superimposed and printed on a part of the image.

  In addition, as shown in FIG. 6, the dot pattern 101 may be superimposed and printed on a symbol or logo (not limited to a logo using a designed character but also including a logo using a standard character) provided on the surface of the print medium 103. it can.

  As described above, a dot pattern superimposed on a symbol or logo applied to the medium surface is called an “icon” in the present invention.

<Optical reading>
When decoding information from the dot pattern 101 of the present invention, the dot pattern 101 is photographed for each image area 102 by a camera, image analysis is performed by a CPU, and a black portion is extracted as a dot pattern 101 from the photographed image. . As described above, since the black color is not expressed in the image region 102, the dot pattern 101 can be easily extracted. The dot pattern 101 may be printed with one of the CMY components with high gradation, and the image area 102 may be printed with other components. In this case, a component selected for dot pattern printing or a composite color (mixed color of ink) of the component selected for printing the image region 102 is extracted as the dot pattern 101. Of course, since the composite color of the component and the component selected for printing the image region 102 is not expressed in the image region 102, the dot pattern 101 can be easily extracted.

  The CPU decodes the information code encoded by the dot pattern 101 according to the decoding algorithm of the information code by the dot pattern.

<Conversion method>
The image area 102 is designed in advance so as to be printed by any one of the C, M, Y, CM, MY, and CY components among the CMY components, or is represented by the CMY components. It is necessary to perform image processing for converting the original image so as to be printed by any one of the C component, M component, Y component, CM component, MY component, and CY component.

  Therefore, an image (illustration, photograph, etc.) expressed by a normal CMY value is displayed on the image area 102 printed by any one of the C component, M component, Y component, CM component, MY component, and CY component. A method of conversion will be described.

<First conversion method>
An image expressed by normal CMY values is input, and CMY values for each partial area are calculated.

  Then, by comparing the values of the C component, M component, and Y component for each partial region and eliminating the component with the lowest value, any one of the M component, Y component, CM component, MY component, CY component The image area 102 to be printed is converted into a component.

Here, “eliminating a component” means generating print data with the value of the component being zero, transmitting the component as a signal so as not to print, and a signal for printing the component Is not transmitted to the printing means.

<Second conversion method>
As a modification of the first conversion method, a conversion method focusing on the fact that the Y component has little influence on the color will be described.

  An image expressed by normal CMY values is input, and CMY values for each partial area are calculated.

Next, the values of the C component, M component, and Y component for each partial region are compared, and the input image is divided into the following cases, and any of the M component, Y component, CM component, MY component, and CY component is selected. The image area 102 printed by the component is converted for each partial area.
(1) When C ≧ Y ≧ M,
(1-1) If Y ≦ αM, the Y component is eliminated.
(1-2) If Y> αM, the M component is eliminated.
(2) When M ≧ Y ≧ C,
(2-1) If Y ≦ αC, the Y component is eliminated.
(2-2) If Y> αC, the C component is eliminated.
(3) When C>M> Y, the Y component is eliminated.
(4) When M>C> Y, the Y component is eliminated.
(5) If Y>C> M,
(5-1) If Y ≦ αM, the Y component is eliminated.
(5-2) When Y> αM, the M component is eliminated.
(6) If Y>M> C,
(6-1) If Y ≦ αC, the Y component is eliminated.
(6-2) If Y> αC, the C component is eliminated.

  Note that “α” shown above is an arbitrary coefficient. Preferably, the second conversion method can be performed in a graphical user interface, and the designer can set the coefficient α while reading the dots with the optical reading means. It shall be adjustable. Alternatively, an optimal “α” may be determined by simulating the imaging resolution and color tone of the optical reading means and / or the printing accuracy and reproduction color tone of the printed material.

<Third conversion method>
A third conversion method will be described.

  In the third conversion method, an image expressed by normal CMY values is converted using a table.

  As a premise of conversion, a ratio conversion table describing the ratio of CMY values after conversion corresponding to the ratio of CMY values of the original image as shown in Table 1 is created. This ratio conversion table is stored in the memory of a computer or printer so that it can be referred to during conversion. Of course, the ratio of the CMY values after conversion needs to be described so that at least one of C, M, and Y is zero.

  At the time of conversion, an image expressed by normal CMY values is input, and CMY values for each partial area are calculated. Next, with reference to the ratio conversion table, the ratio is converted into a ratio of CMY values corresponding to the ratio of the normal CMY values, and mapped to the portion. The ratio conversion table is created in advance by simulating the imaging resolution and color tone of the optical reading means and / or the printing accuracy and reproduction color tone of the printed material. Alternatively, a test medium actually printed under various conditions is measured, the performance of the optical reading means is added to the preconditions, and a ratio conversion table is created in advance.

<Fourth conversion method>
The fourth conversion method is to convert an image (illustration, photograph, etc.) represented by a normal CMY component into an arbitrary color tone, so that the C component, M component, Y component, CM component, MY component, CY component are converted. The image is converted into an image area to be printed by any one of the components.

<When converting to one color tone>
When converting to one color tone, an image expressed by a normal CMY component is input, the brightness of each part of the image is calculated, and the C component (or M component) of the value corresponding to the brightness of each part , Y component), the image is converted into an image area 102 printed only by the C component.

  As another method of converting to one color tone, an image expressed by the CMY component may be temporarily converted to a gray scale and mapped with an arbitrary color tone based on its brightness. In mapping, the function F may be used, where C = F (K), where K is the gray scale value, C is the scale of an arbitrary color tone. In addition, there are an intermediate value method, a weighted average method, a simple average method, a G channel method, and the like as a conversion method from an image to a gray scale, and it is only necessary to select an optimal method that can represent a target image.

  The intermediate value method is a method of adding the maximum and minimum values of R, G, and B values of all pixels and dividing them by 2. The weighted average method is applied to the R, G, and B values of all pixels. By weighting, the average value of them, the simple average method is the average value of R, G, B values, the G channel method is the method of G values of R, G, B values is there.

  The relationship between the calculated brightness and the converted value may be described in advance using a color tone conversion table.

<When converting to two colors>
An image expressed by normal CMY components is input, and components other than the selected component are eliminated. For example, when converting to a color tone of two CM colors, the Y component is eliminated, and the image is converted to an image area 102 printed by any one of the C component, M component, and CM component.

  Here, a value obtained by multiplying the value of the lost Y component by a predetermined coefficient β may be added to the value of the C component and the value of the M component for each part of the image.

  Alternatively, a value obtained by multiplying the value of the Y component by different coefficients β1 and β2 between the value of the C component and the value of the M component may be added.

  Preferably, the fourth conversion method can be performed in a graphical user interface, and the designer can adjust the coefficients β, β1, and β2.

<Fifth conversion method>
In the fifth conversion method, conversion is performed so that the color of the image after conversion looks as similar as possible to the color of the original image.

  First, an image expressed by normal CMY components is input, the image is divided into predetermined areas 1021, and the C value, M value, and Y value for each predetermined area 1021 are calculated.

  Note that it is desirable to calculate a C value, an M value, and a Y value obtained by subtracting a region where all the CMY components are superimposed from the component value for each predetermined region 1021.

  Next, each of the predetermined areas 1021 is a component of the C component area printed by only the C component, the M component area printed by only the M component, and the Y component area printed only by the Y component among the CMY components. Dividing into regions 1022, the sum of the component values included in each component region 1022 multiplied by the C value, M value, and Y value of the component included in each component region 1022 and the area value of the component region 1022 C value, M value of each of the component regions 1022 so that the value is equal to the total value obtained by multiplying the C value, M value, and Y value of the predetermined region 1021 by the area value of the predetermined region 1021 , Y value is mapped.

  The predetermined area 1021 may be divided into component areas 1022 of a C component area printed by only the C component and a MY component area printed only by the MY component of the CMY components, or The component area 1022 may be divided into an M component area printed only by the M component and a CY component area printed only by the CY component.

  Since the Y component has little influence on the discrimination from black (dot), it is more desirable to divide it into the C component and the MY component, or the M component and the CY component. Which is selected is preferably divided into the C component and the MY component when the C component is larger than the M component, and divided into the M component and the CY component when the C component is smaller than the M component.

  Even if the image is converted in this way, as shown in FIG. 7, the colors of the component regions 1022 finely divided are mixed with each other in the human eye (this is referred to as “view mix”), and the original predetermined region 1021 is obtained. Since it is recognized as a color (or its approximate color), it can be visually recognized as an image substantially similar to the original image. Note that there are a halftone dot method and an FM screen method as general printing methods. In the halftone dot method, dots of each component color are printed at positions where C, M, and Y components are arranged according to a predetermined rule, and the gradation of the component is expressed by the size of the dots (the amount of halftone dots). Further, even if the amount of halftone dots is small, a portion where the respective components are overlapped to prevent moire according to a predetermined rule occurs. When the amount of halftone dots is large, each component overlaps, and the overlapping portion is mixed in color and becomes dark brown (composite black) close to black. On the other hand, in the FM screen method, dots having a uniform size are arranged at printing points arranged in a predetermined area in which the printing area is uniformly divided. The gradation of each component is determined by the number of dots arranged at the printing points in the predetermined area. If the brightness is low, the number of K component dots increases. If the saturation is high, the number of C, M, and Y component dots increases, and the number of K component dots decreases. The view mix is used for both the halftone dot method and the FM screen method. However, black is not generated if printing is performed with only the C, M, and Y components in the FM screen method, but composite black is generated even when printing is performed with only the C, M, and Y components in the halftone method. Therefore, the present invention is an invention for converting so as not to generate composite black even in a halftone method in a region including C, M, and Y components. Furthermore, in order to generate the composite black and express the original color, the dot pattern black is used instead of the composite black. At that time, the dot size of the dot pattern may be made variable to generate a dot pattern by controlling the size of the dot so as to have the same color influence as the generated composite black. That is, the dot size may be determined so as to be approximately equal to the area of the dots per unit area and the area of the composite black. At this time, the C, M, and Y components are arranged in a predetermined region so as not to generate composite black. However, it is necessary to subtract from the respective C, M, and Y components by the area of the composite black. In the case where composite black is not generated by image conversion, the dot size may be set so that the color hardly affects human eyes.

  That is, the total area of the first dot having the smallest size and the second dot having the largest size capable of recognizing the dots, and the total area of the regions where all the CMY components are superposed among the partial regions, Compare When the total area of the region where all the CMY components are superimposed is smaller than the total area of the first dots, the dot pattern printed in the partial region is set as the first dot. When the total area of the region where all the CMY components are superimposed is larger than the total area of the second dots, the dot pattern printed in the partial region is set as the second dot. When the total area of the region where all the CMY components are superimposed is larger than the total area of the first dots and smaller than the total area of the second dots, the total area of the dots of the dot pattern printed in the partial region is , The dots are sized so that the total area of the regions where all the CMY components are superimposed is equal.

  In this case, when the total area of the regions where all the CMY components are superimposed is smaller than the total area of the first dots or larger than the total area of the second dots, the dot pattern dot interval within a predetermined range The size is controlled so that it is larger than the total area of the first dots and smaller than the total area of the second dots, and the total area of the dots of the dot pattern printed in the partial area and all the CMY components are superimposed. The dots are sized so that the total area is equal to the total area.

  However, the dot size must be within a range that can be recognized by the optical reading means.

  Although the predetermined area 1021 in FIG. 7 is a rectangle, it may be of any shape.

  8 and 9 are diagrams showing specific examples of the predetermined area 1021 in FIG.

  FIG. 8A shows a rectangular shape of the predetermined region 1021 in accordance with the same arrangement rule as that of RGB of a liquid crystal display that provides a clear image by view mixing. In (b), the shape of the predetermined region 1021 is a hexagon so that the same color does not adjoin at the boundary. In FIGS. 8A and 8B, the shape of the predetermined region 1021 is a triangle so that the same color does not adjoin at the boundary.

  As described above, the predetermined region 1021 can have various shapes. Moreover, as shown in FIG. 9, even if it is the same shape, the shape of each pixel of C, M, and Y can be set arbitrarily.

  C, M, and Y components or C, M, and Y components and dots that are printed in a predetermined printing region at a position appropriate for a person to visually recognize a predetermined printed matter or a predetermined position, The process of component division and mapping is called a view mix process so that a view mix that mixes and looks like a predetermined color is generated appropriately. The viewpoint position varies depending on the use, size, shape, etc. of the print medium and the target graphic. A predetermined print area is determined so that a view mix occurs when viewing a relatively small print medium such as a postcard at a distance of about 20 to 40 cm, and a view mix occurs when the print medium is a large print medium such as a poster. In other words, an appropriate predetermined area may be determined by roughly setting the viewpoint position in advance.

  On the other hand, even if the camera is photographed close to or away from the medium, the original dot pattern 101 of the image data recorded in the frame buffer (temporary storage medium on which the captured image data is recorded) of the information processing apparatus is recorded. Any resolution can be used as long as the arrangement can be properly recognized. Since the camera captures the reflected light of each component from the printed surface that is irradiated with some light source (natural light, artificial light, indirect light), the composite pattern is not generated by combining the light. It is possible to take a picture separately from the area 102. That is, even if the resolution of the camera is low, reflected light from the medium surface is mixed with the CMY component and the color of the medium surface on which the ink is not placed (white for white paper) and is captured by the camera element. In contrast to being mixed and black (composite black), the lightness is increased by mixing a lot of light in the unit area, and the dot pattern 101 can be photographed separately from the image region 102.

  In other words, the inventor of the present application uses a human eye that cannot recognize dots, and a printing technique and visible light that can coexist with dot pattern superposition printing by using the visual position of the camera that can recognize dots and the color appearance at the shooting position. Developed dot pattern reading technology.

  Other embodiments of the present invention will be described.

  As shown in FIG. 10, when a graphic is represented by CMY by halftone printing, C, M, and Y are arranged and printed as shown in FIG. The halftone dots may be round or other shapes. Normally, the dots are black and are arranged as shown in FIG. 10B, but are printed as shown in FIG.

  As shown in FIG. 11, when printing with halftone dots, as shown in FIG. 11 (a), the region where C, M, and Y overlap is mixed with ink and becomes dark brown that is close to black. If only the C, M, and Y components are removed from the captured image (a) by image processing, a dark brown image close to black in the area where C, M, and Y overlap as shown in FIG. When superimposed printing is performed with black dots, an image as shown in FIG. 9C is obtained, and it is difficult to binarize and extract only the dots from this image. It should be noted that the dark dark brown area that is mixed with the printed ink and close to black is sufficiently small compared to the size of the dot (at least about 1/4 in the captured image). Any dot amount of Y component may be used. The graphic is expressed so that each dot amount (halftone dot diameter) of C, M, and Y is less than about 1/2 of the dot size (diameter) and each dot amount is less than 50%. do it. If each halftone dot amount is less than 50%, the ink is mixed and the dark brown area close to black is at least about 1/4 or less of the dot size (area), and the dot can be identified.

  As shown in FIG. 12, when halftone printing is used to represent a graphic in CMYK and dot is overprinted, C, M, Y, K are arranged and the dots are black as shown in FIG. Overprinted. When only the C, M, and Y components are removed from the captured image of FIG. 12A by image processing, dark dark brown and K close to black in the area where C, M, and Y overlap as shown in FIG. 12B. It becomes a black image, and it is difficult to binarize and extract only the dots from this image. In addition, when dark and dark brown areas close to black are mixed with printed ink and K black areas are sufficiently small compared to the size of the dots (at least about 1/4 or less in the captured image), it can be determined as dots. The halftone dot amount of the C, M, Y, and K components of the above may be sufficient.

  As shown in FIG. 13, in halftone printing, when a graphic is expressed only by C and dots are superimposed and printed, C is arranged and dots are superimposed and printed in black as shown in FIG. Although only black dots are extracted by image processing, if the C component is large, simple image processing may determine the same color as the dot. If simple image processing is used, the C component value to be used Is preferably less than or equal to a predetermined value. Similarly, FIG. 13 (b) and FIG. 13 (c) show a case where only M and Y are printed. However, in the case of Y even with simple image processing, it is easy to distinguish dots even if the Y component is large.

  As shown in FIG. 14, when halftone printing is used to represent a graphic with only C and M, and dots are superimposed and printed, as shown in FIG. 14 (a), C and M are arranged, and the dots are printed in black and superimposed. Is done. Only black dots are extracted by image processing. Depending on the image processing method used, it is desirable to limit the C and M component values for dot discrimination. Similarly, FIG. 14 (b) and FIG. 14 (c) show the case where only M, Y, C, and Y are printed. Depending on the image processing method used, the component value of each component is used for dot discrimination. It is desirable to limit.

  FIG. 15 is a diagram including a partial region including three different components and a region (CMY region) where the three components overlap. FIG. 16A is an enlarged view of the CMY region of FIG. 15 and a partial region in the vicinity thereof. FIG. 16B is a diagram obtained by binarization and removing only the C, M, and Y components by image processing. In the CMY area, dots cannot be identified. In the vicinity of the boundary of the CMY area, if printing is performed such that C, M, and Y overlap and ink is not mixed, it is possible to determine dots in areas other than the CMY area. If the size of the CMY area where C, M, and Y overlap and the ink is mixed (composite black) is sufficiently small compared to the dot size, the dot can be identified by performing a comparison calculation. it can.

  However, when the dot and the composite black overlap, the center of the dot is shifted from the original position. If the deviation is large, there is a possibility that the arrangement of the dot pattern in which the information code is encoded may not be properly recognized. Needless to say, not only the size but also the composite black is excluded from the shape of the image processing to appropriately determine the center of the dot.

<Printing system>
A printing system for an image with a dot pattern using the present invention will be described with reference to FIG.

  The server 105 stores illustrations or photographs as templates as image data.

  This image data includes one or more partial areas printed by any one of the C, M, Y, CM, MY, and CY components among the CMY components, and all the CMY components Are pre-designed so as not to include a portion to be superimposed, or have been subjected to image processing by the conversion method described above.

  The customer operates the customer terminal 106 to browse a catalog in which illustrations or photographs are posted.

  The customer selects one illustration or photo from the catalog and operates the customer terminal 106 to transmit the selection result to the server 105 to generate an order. In addition, an illustration or a photograph prepared by the customer may be transmitted from the customer terminal 106 to the server 105.

  The server 105 transmits the order received from the customer terminal 106 to the provider terminal 107.

  The service provider operates the provider terminal 107 to add the dot pattern 101 to the image data selected by the customer to generate image data with a dot pattern, and transmit it to the printing apparatus 108. In this case, the image data selected by the customer from the catalog may be data in which dots can be discriminated by dividing into partial areas of C component, M component, Y component, CM component, MY component, CY component in advance. The image may be converted with. The converted image data with dot pattern is transmitted to the printing apparatus 108 and printed. Depending on the printing device 108, the K component may be automatically added depending on the color scheme of each component, and it is necessary to incorporate a driver for controlling them into the printing device 108 or to transmit a signal from the server for control. In addition, the printing apparatus 108 has an image conversion function, and the original illustration or photo area is divided into C, M, Y, CM, MY, and CY component partial areas of the CMY component, The dot pattern may be superimposed and printed with the K component, and the print medium 103 that is an image with a dot pattern that can identify the dots may be output. Note that the image conversion described above may be any method presented in the present invention that can distinguish dots.

  In the case of printing, in the dot pattern printed in the partial area, the total area of the first dot having the smallest size and the second dot having the largest size, which can recognize the dot, and the portion You may compare with the total area of the area | region where all the CMY components are superimposed among area | regions.

  In this case, when the total area of the region where all the CMY components are superimposed is smaller than the total area of the first dots, the dot pattern printed in the partial region is set as the first dot. When the total area of the region where all the CMY components are superimposed is larger than the total area of the second dots, the dot pattern printed in the partial region is set as the second dot. When the total area of the region where all the CMY components are superimposed is larger than the total area of the first dots and smaller than the total area of the second dots, the total area of the dots of the dot pattern printed in the partial region is , The dots are sized so that the total area of the regions where all the CMY components are superimposed is equal.

  When the total area of the region where all the CMY components are superimposed is smaller than the total area of the first dots or larger than the total area of the second dots, the size of the dot interval of the dot pattern within a predetermined range Is controlled so that the total area of the dots is larger than the total area of the first dots and smaller than the total area of the second dots, and the total area of the dots of the dot pattern printed in the partial area and the area where all the CMY components are superimposed It is good also as a dot of the magnitude | size which becomes equal to the total area of these.

  Further, the size of the region where all the CMY components of the image information are superimposed is reduced to a halftone dot amount of the CMY component that can be recognized by comparison with the size of the dots constituting the dot pattern. You may compare the total area of a dot and a 2nd dot, and the total area of the difference of the halftone amount reduced to the halftone dot amount of a CMY component.

  In this case, if the total area of the difference of the halftone amount reduced to the halftone dot amount of the CMY component is smaller than the total area of the first dot, the dot pattern of the region where all the CMY components are superimposed is set to the first dot pattern. Dots. If the total area of the dot amount differences reduced to the dot amount of the CMY component is larger than the total area of the second dot, the dot pattern of the region where all the CMY components are superimposed is defined as the second dot. To do. A region where all the CMY components are superimposed when the total area of the difference of the halftone dot amounts reduced to the halftone dot amount of the CMY components is larger than the total area of the first dots and smaller than the total area of the second dots It is assumed that the total dot area of the dot pattern is equal to the total area of the difference between the halftone dot amounts reduced to the halftone dot amount of the CMY component.

  When the total area of the difference of the halftone dot amounts reduced to the halftone dot amount of the CMY component is smaller than the total area of the first dots or larger than the total area of the second dots, the dot pattern within a predetermined range The total dot area of the dot pattern in the region where all of the CMY components are superimposed, and is larger than the total area of the first dots and smaller than the total area of the second dots, It is good also as a dot of a magnitude | size that the total area of the difference of the halftone amount reduced to the halftone amount of a CMY component becomes equal.

  Conventionally, a dot pattern is printed using ink that can be read only by infrared rays. For this reason, a camera such as a mobile phone that uses a filter that blocks infrared rays to prevent photographing with infrared rays cannot read the dot code, and it is necessary to read the dot pattern using a dedicated scanner. It was.

In the present invention, a dot pattern readable by visible light is realized. Therefore, it becomes possible to read the dot pattern with a normal camera such as a mobile phone, a smartphone, a web camera, or a digital camera. This makes it possible to use dot codes more easily and in a wide range.

<Example using lens unit>

  18 to 38 are diagrams illustrating a case where a dot pattern that is readable by visible light and is encoded with code information is photographed using the lens unit 200 for reading a dot pattern.

  The lens unit 200 for reading a dot pattern used in the present embodiment is assumed to be used by being mounted on an information processing apparatus such as a smartphone, a tablet PC, and a camera-equipped mobile phone (hereinafter referred to as “smart phone”). The code information refers to a code value, a coordinate value, or a code value and a coordinate value.

  However, a dot pattern in which an information code is encoded is read from image data photographed by a camera through the lens unit 200, and a reading means for decoding the pattern into an information code and an information code are transmitted or corresponding information is output. Any information processing apparatus provided with an information processing means that can be mounted on a camera can be used. The lens unit 200 includes a cylindrical lens holder 201 and a lens 202 that are provided at both ends with a lower opening that is mounted so as to surround the photographing port of the camera and an upper opening that is in contact with the print medium. Note that when the dot pattern is photographed by the camera through the lens unit 200, the inside of the cylindrical lens holder 201 is arranged so that the print medium on which the dot pattern touched to the upper opening is within the depth of field. The lens 202 is disposed and designed at a predetermined position.

  On the other hand, a smartphone or the like is equipped with a filter that blocks infrared wavelengths including some visible light of about 700 or more so that an object such as a person cannot be photographed in the infrared region on the assumption that the consumer will use it.

  When shooting with a camera such as a smartphone, in many cases, it is not designed to zoom in and close to a very small subject (around 1 to 2 cm), so it is taken at a certain distance from the subject. There is a need to. For this reason, even when a two-dimensional code such as a QR code is photographed with a smartphone or the like, it is difficult to focus instantly due to hand shaking or the like, and the enlargement magnification is low. In addition, when focusing on dots with autofocus, the dots are too small compared to two-dimensional codes such as QR codes with relatively large patterns. There are many cases. Even if the subject is photographed in focus, the dot pattern cannot be read with sufficient accuracy to analyze the dot code from the smallest dots due to the limit of the photographing resolution. Therefore, a camera such as a smartphone has a problem that it is difficult to read a very small dot pattern.

  However, by using the lens unit 200, it is possible to focus on the contact surface between the lens unit 200 and the print medium, and to shoot an enlarged dot pattern of the subject, with a resolution that allows the dot code to be analyzed. A dot pattern can be captured. This makes it possible to read the dot pattern with a normal smartphone or the like. In addition, by using the lens unit 200 having a large depth of field, it is possible to capture a dot pattern without contacting the print medium surface. Furthermore, by using a telephoto lens unit having a large depth of field, it is possible to capture a dot pattern by photographing a print medium with a dot pattern at a distant position.

  18 to 19 are diagrams of the lens unit 200 used in the present embodiment. FIG. 18 is a perspective view, FIG. 19A is a side view, FIG. 19B is a front view (medium contact surface side), and FIG. ) Is a rear view (lens unit 200 mounting side).

  The lens unit 200 has a structure in which the upper part is tapered and the lower part is cylindrical. A lens 202 (convex lens) is provided near the boundary between the upper part and the lower part. In addition, an adhesive member is provided on the bottom surface and can be attached to a smartphone or the like. The lens unit 200 is attached so as to surround a camera such as a smartphone in the outer peripheral wall (D) on the mounting side. The lens unit 200 may have any shape such as a cylinder, a cone, or a box as long as it surrounds a camera such as a smartphone in the outer peripheral wall (D) on the mounting side. Moreover, at least one of the upper opening or the lower opening may have a tapered shape. Although not shown, a single lens may be used instead of a single convex lens. Accordingly, the aberration of the lens can be suppressed, the depth of field can be increased to facilitate focusing, and the height of the lens can be reduced. The material of the lens unit 200 composed of the lens holder 201 and the lens 202 is preferably transparent in order to brighten the medium surface to be photographed.

  However, since the lens holder 201 is for securing external light, the lens holder 201 does not necessarily need to be transparent (semi-transparent, etc.) as long as it can secure a light amount sufficient to capture the dot pattern of the subject.

  The lens 202 is preferably made of transparent acrylic at a low manufacturing cost, but glass may be used to improve accuracy. Further, the lens holder 201 may be transparent acrylic, and the lens 202 may be glass. When all are made of transparent acrylic, if they are spread in the direction of the opening, they can be integrally molded and can be manufactured at a lower cost.

  FIG. 20 is a diagram illustrating various forms of the lens unit 200.

  In the lens unit 200, an opening (lower opening) on the lower bottom surface is attached to the camera, and an upper upper opening (upper opening) is in contact with the medium surface.

  In mobile phones and smartphones, the outer peripheral wall of the lower opening needs to be large enough to cover the camera (about 1.5 cm in diameter), and in tablet PCs, it may be about 3 to 7 mm in diameter. On the other hand, the upper opening may have various sizes as shown in (a) to (c).

  (A) is a lens unit 200 formed in a bowl shape, with the upper diagram being a front view (medium contact surface side), the middle diagram being a side view, and the lower diagram being a rear view (lens mounting side). is there.

  In the case of a bowl, the upper opening, that is, the area on the medium side is widened. Therefore, as will be described later, it is suitable when a card or a figure is placed and used. However, if a camera such as a smartphone is not located in the center of the outer peripheral wall (D) of the lower opening on the lens unit 200 mounting side, the dot pattern printed on the medium surface is shifted from the shooting range and the upper opening ( In some cases, the image is taken only in a part of the area (W).

  (B) is a lens unit 200 formed in a columnar shape, with the upper figure being a front view (medium contact side), the middle figure being a side view, and the lower figure being a rear view (lens mounting side). is there. It is easy to make molds for manufacturing and has high cost performance.

  (C) is a lens unit 200 formed in the shape of a truncated cone. The upper diagram is a front view (medium contact surface side), the middle diagram is a side view, and the lower diagram is a rear view (lens mounting side). It is.

  In the case of the truncated cone shape, the upper opening, that is, the area on the medium side is narrow. Therefore, it is suitable for reliably photographing the entire region of the print medium on which the dot pattern is printed, which can be seen from the inside of the upper opening. That is, the dot pattern printed on the medium surface is surely displayed on the upper opening (W) wherever a camera such as a smartphone is located in the outer peripheral wall (D) of the lower opening on the lens unit 200 mounting side. Designed to capture the entire area. Such a design is caused by the mounting position of the lens and the focal length of the lens, and the above (a) and (b) are not as easy as (c) but can be realized. Of course, the larger the upper opening and the larger the photographing area, the wider the lens needs to be used.

  In any of the embodiments (a), (b), and (c), a pedestal indicated by a dotted line is provided around the upper opening of the lens unit 200 so that a figure, a card, or the like can be easily placed. Good.

  In this manner, various reading lens units 200 can be properly used depending on the application.

  FIG. 21 shows a lens cover 203 provided with an opening in the upper opening on the medium contact surface side of the lens unit 200 in FIGS.

  The lens cover 203 is installed, a printing area is provided in the vicinity of the outer peripheral wall on the medium contact surface side, and an ID code and a pattern for facilitating focusing are printed. Note that the printing surface is preferably on the medium contact surface side of the lens cover 203 close to the medium, but may be on the lens 202 side so that the printing surface is not soiled within the depth of field. An opening is provided in the center so that the dot pattern printed on the medium surface becomes difficult to read due to dust, dirt, and scratches on the lens cover 203 and has a ring shape.

  FIG. 22 shows a case where a transparent lens cover 204 is installed in the upper opening on the medium contact surface side of the lens unit 200 shown in FIGS. A print area is provided in the vicinity of the outer peripheral wall on the medium contact surface side, and a pattern for making it easy to adjust the ID code and focus is printed. The printing surface is preferably on the medium contact surface side of the transparent lens cover 204 close to the medium, but may be on the lens side so that the printing surface does not get dirty as long as it is within the depth of field. Furthermore, it is also effective as a dustproof device so that dust does not adhere to the lens 202. It should be noted that the transparent lens cover 204 is transparent at a position dropped from the outer peripheral frame on the medium contact surface side of the lens unit 200 to the first lens side so that the dot pattern printed on the medium surface is not easily read due to dust, dirt, or scratches. A lens cover 204 is provided.

  FIG. 23 is a diagram in which an ID code is added to the medium contacting surface side of the lens unit 200. (A), (b), (c) is the figure where the notch is provided in the inner wall of the lens holder 201 on the medium contact surface side. This notch is provided according to a predetermined rule, and an ID code is added.

  The ID code is code information for specifying the lens unit 200. By encoding the code information into the ID code, it is possible to identify which lens unit 200 was used when the user shot the dot pattern with the camera. If the ID code cannot be recognized, the software for dot pattern reading stored in a smartphone or the like does not start the software. When the ID code is recognized, the read dot pattern is analyzed. As a result, forgery and unauthorized use of the lens unit 200 can be prevented, the quality of the captured image can be guaranteed (photographed with a predetermined performance), and software corresponding to the ID code can be executed. The cutout has an arbitrary shape such as a semicircle or a polygon, and an arbitrary size. By further adding a combination of shape and size to the above-mentioned predetermined rule, an ID code with more information codes can be encoded.

  In (d), the lens cover 203 is mounted on the medium contact surface side of the lens unit 200, dots are arranged at predetermined intervals in the rotation direction around the upper opening, and the codes are defined in combination and order of the arrangement intervals. Circle pattern to do. Furthermore, although not shown, if the stream dot pattern invented by the present inventor is arranged and used in the rotation direction, more information can be used as the ID. Details of the stream dot pattern are disclosed in International Publication No. WO2011 / 007783. The lens cover 203 must be of a color and material that can distinguish between dots and graphics printed on a medium and a circle pattern. Needless to say, a certain brightness and contrast are required for shooting the circle pattern, and it is desirable that the area where the circle pattern is printed is milky white acrylic or white (may be printed). The circle pattern does not need to be a circular dot, but is formed by a plurality of marks having an arbitrary shape and size such as a polygonal dot or a line segment, and a combination of the shape and size of the mark is predetermined. Any circle pattern in which an ID code is encoded in addition to the above rule may be used. Further, the information amount of the ID code can be further increased by combining the marks using a plurality of colors.

  FIG. 24 is a diagram in which a lens cover 203 or a transparent lens cover 204 is attached to the medium contact surface side of the lens unit 200 and a pattern for focusing with autofocus is printed. When shooting dots with a mobile phone or smartphone camera, there is a problem that it is difficult to focus because the dots are extremely small, and the dot pattern cannot be accurately shot. Therefore, a pattern for focusing is added to the lens cover 203 or the transparent lens cover 204 attached to the lens unit 200. By focusing on the pattern and shooting the dots, the dot pattern can be focused and shot. Naturally, the combination of the camera 202 and the lens 202 that is in focus so that the print medium contact side or lens side representation of the lens cover 204 is within the depth of field together with the print medium contacted to the upper opening, and The lens 202 must be placed in The analysis of the dot code targets a dot pattern photographed through the central opening of the lens cover 203 or a dot pattern photographed in the central portion where neither the pattern of the transparent lens cover 204 nor the ID code is printed. The lens cover 203 must be a color and a material that can distinguish the dot and the ID code when the ID code is printed. In particular, in order to capture an ID code with a camera, the ID code needs to have a certain brightness and contrast, and the area where the ID code is printed is milky white acrylic or white (may be printed). desirable.

  (A), (c) is a lens cover 203 provided with an opening, and (b), (d) are a transparent lens cover 204 provided with no opening.

  In (a), the inner periphery of the opening is cut out, and a concentric pattern is provided on the outer periphery. As described above, the notch encodes an information code as an ID code.

  In (b), only concentric patterns are provided on the outer periphery. When an information code is encoded using a concentric pattern as an ID code, for example, the information code may be encoded into an ID code according to a combination of color forming the pattern, the size of the area, and the order. The pattern may be any pattern as long as it is in focus. However, even if a dot pattern or graphic is captured through the lens cover 203 or the transparent lens cover 204, it must be recognized as an ID code.

  In (c) and (d), a circle pattern formed according to a predetermined rule is provided on the inner periphery, and a concentric pattern is provided on the outer periphery. As described above, the circle pattern encodes an ID code. The lens cover 203 in (c) is milky white acrylic and the transparent lens cover in (d) so that the dot pattern or graphic printed on the medium can be picked up through the lens cover 203 or the transparent lens cover 204 and the circle pattern can be read. In 204, it is desirable that the background of the area where the ID code is printed be white (printing may be performed). However, milky white acrylic is even better. This is because, in the case of white, the light transmittance is low, and the pattern print area and the print medium surface are slightly darker than milky white acrylic. The brighter the shooting surface, the easier it is to focus, and it is easier to distinguish between dots and graphics. In addition, acrylic can be molded at the same time as the transparent part by multi-injection and has excellent cost performance. In addition, you may pour ink at the time of shaping | molding and you may give a pattern to acrylic. A camera that has a focusing function on the entire surface is in focus even when focused on the periphery, and thus a pattern can be arranged on the outer periphery of the lens cover 203 or the transparent lens cover 204 in this way.

  FIG. 25 is a diagram in which a pattern printed with transparent ink for focusing is provided at the central portion of the transparent lens cover 204 provided in the lens unit 200 for the camera in which the focus function works in the central portion. In addition, when reading a medium on which a dot pattern is superimposed and printed on a graphic, the medium is read through the transparent lens cover 204, and the dot and graphic and the pattern for focusing are photographed. Therefore, only the dots have to be extracted from the image where they overlap. For example, if the pattern is red (R) and the graphic is cyan (C), C emits blue (B) and green (G), and there is no red (R) component. If the red (R) pattern is black (B) and the dots are black (B), the dots cannot be identified. On the other hand, when the pattern is cyan (C), if the graphic is blue (B), the captured image is blue (B), if the graphic is green, green (G), if yellow (Y), green (G), magenta (M) is blue (B), cyan (C) or white (W) is cyan (C), and the captured image is black (B) only when the graphic is red (G). If is black (B), the dot cannot be identified.

  Therefore, if the pattern for focusing is drawn with cyan (C) and the dots are printed with black (B), red (R) should not be used for the graphic. That is, it is necessary to determine the pattern for focusing and the color of the graphic so as not to be the same color as the dot color. If only dots are always printed, the pattern and dots for focusing need only be determined. In addition, when dots are always printed superimposed with a graphic, the graphic is autofocused and focused, so that a pattern for focusing is not necessary. In other words, the pattern for focusing is required when only dots are printed and when graphics and superimposed printing are mixed. Note that the color used for the pattern may be yellow, which does not become dark black even if blue is used for graphics because the color temperature is low.

  (A) is provided with a concentric pattern at the center and a circle pattern around it. The transparent lens cover 204 may have a white base (or may be printed) in the area where the circle pattern is printed, but is preferably milky white acrylic. This is because, in the case of white, the light transmittance is low, and the pattern print area and the print medium surface are slightly darker than milky white acrylic. The brighter the shooting surface, the easier it is to focus, and it is easier to distinguish between dots and graphics. In addition, acrylic can be molded at the same time as the transparent part by multi-injection and has excellent cost performance. In addition, you may pour ink at the time of shaping | molding and you may give a pattern to acrylic.

  (B) is a diagram in which a concentric pattern is formed at the center, and a notch is provided in the inner wall of the lens holder 201 on the medium contact surface side. This notch is provided according to a predetermined rule, and an ID code is encoded.

  In (c), only a concentric pattern is provided at the center. When encoding an information code using a concentric pattern as an ID code, for example, the information code may be encoded into an ID code according to a combination of color forming the pattern, the size of the area, and the order. The pattern may be any pattern as long as it is in focus. However, even if a dot pattern or graphic is captured through the transparent lens cover 204, it must be recognized as an ID code.

  The circle patterns and patterns described in FIGS. 23 to 25 may be provided by imprinting in addition to printing. The engraved part is shaded and can be read. However, since the contrast is low, the recognition rate is low. For mass production, stamps can be manufactured at low cost.

  FIG. 26 is a diagram illustrating the lens unit 200 with an irradiation function.

  The structure of the lens unit 200 is the same as that of FIG. Battery). The light source is preferably an LED with a small size and power saving. Further, since the LED is inexpensive together with the lens unit 200, the power button is not provided and the LED may be disposable. The battery storage case may have any shape, and may be disposed on the side surface of the lens holder 201, or may be separated from the lens holder 201 and the battery 206 by extending the conducting wire.

  (A) is the lens unit 200 formed in the shape of a bowl, the upper figure is a front view, the middle figure is a side view, and the lower figure is a rear view.

  (B) is the lens unit 200 formed in the column shape, the upper figure is a front view, the middle figure is a side view, and the lower figure is a rear view.

  (C) is the lens unit 200 formed in the shape of a truncated cone, the upper diagram is a front view, the middle diagram is a side view, and the lower diagram is a rear view.

  In FIGS. 4A to 4C, the number of light sources 205 is one. However, the present invention is not limited to this, and the number of light sources 205 may be two, and the print medium surface may be irradiated uniformly. Therefore, three or more may be used. In particular, when the diffuser 209 shown in FIG. 29 is provided or when a diffuse light-emitting LED is used as the light source 205, the light can be refracted and diffused to uniformly illuminate the print medium surface. Good.

  FIG. 27 is a diagram illustrating another form of the lens unit 200 with an irradiation function.

  (A) is a lens unit with an irradiation function in which the power button 207 is not provided. As described above, if the light source 205 is an LED, the power consumption is extremely low and the lens unit 200 is inexpensive. Therefore, the light source 205 can be disposable without providing a power button.

  (B) is a lens unit with an irradiation function in which a battery 206 is provided outside the lens holder 201. The lens unit 200 and the battery 206 are connected by a conducting wire. According to this, since it is not necessary to provide a space for storing the battery 206 in the lens holder 201, the manufacturing of the lens holder 201 can be simplified.

  FIG. 28 is a diagram in which a lens cover 204 is installed in a lens unit with an irradiation function. The lens cover 204 is used in the same manner as in FIG. A lens cover 203 having an opening may be installed. The application in that case is the same as in FIG.

  FIG. 29 is a diagram showing a form of a lens unit with an irradiation function. Note that it is desirable to arrange the light source 205 so that the medium surface is uniformly irradiated. Further, a diffuser 209 made of a member that refracts / diffuses and reflects light emitted from the light source 205 to the lens holder 201 in the vicinity of the light source and uniformly irradiates the surface of the print medium contacting the upper opening may be provided. A diffuse light emitting LED may be used for the light source 205.

  (A) uses a white LED 208 as a light source 205 in a lens unit with an irradiation function. Even if the medium surface is so dark that dots cannot be recognized, the dot code can be read by making the medium surface brighter by irradiating with the white LED 208. Thus, (1) when the surrounding environment is dark, (2) when the lens holder 201 is formed of a color or material that does not transmit light, and (3) even when the lens unit 200 is built in an object such as a figure, The code can be read. In addition, when the program which reads a dot code with the lens unit 200 is started, displays, such as a smart phone, may become white and bright and may illuminate the medium surface.

  (B) shows a case where a transparent lens cover 204 is installed as shown in FIG. 5 (a). A printing area is provided in the vicinity of the outer peripheral wall on the lens side, and an ID code and a pattern for focusing are printed. As in FIG. 25, a pattern may be printed in the center with a transparent color.

  (C) is a lens unit with an irradiation function, in which a transparent lens cover 204 is installed and an IR LED 210 having a predetermined wavelength is used as a light source 205. The transparent lens cover 204 is provided with a printing area in the vicinity of the inner peripheral wall on the lens 202 side, and an ID code and a pattern for focusing are printed. An IR filter 211 is provided on the medium contact surface side of the transparent lens cover 204 to transmit only infrared light having a predetermined wavelength or more and block other wavelength light. Note that the IR filter 211 may be provided at any position from the transparent lens cover 204 to the lens unit 200 mounting side unless an ID code or a pattern for focusing is provided. The surface of the lens 202 may be filtered.

  When the IR LED 210 irradiates a medium surface on which a dot pattern is superimposed and printed on a graphic, if dots are printed with an ink that absorbs infrared rays (carbon black or the like), only the dot portion is photographed black in the captured image of the camera. Thus, the dot code can be easily read. In addition, the lens unit with IR LED irradiation function of the same figure is used when the infrared ray shielding filter is not used in a smartphone or the like, or when the infrared ray is not completely cut off even if it is used.

  In FIGS. 4A to 4C, the number of the light sources 205 is two. However, the present invention is not limited to this, and the case where a high-performance diffuser 209 is provided or a diffused light emitting LED is used as the light source 205. In this case, since the light can be refracted and diffused to uniformly irradiate the print medium surface, only one light source 205 may be used.

  FIG. 30 is a diagram for explaining the relationship between the white LED 208, the filter of a mobile phone or a camera with a built-in smartphone, an infrared filter, and the wavelength and transmittance of an IR LED.

  A camera such as a smartphone is provided with an infrared blocking filter. On the other hand, the IR unit 211 (visible light blocking filter) is provided in the lens unit with an irradiation function shown in FIGS. 26 and 29C. The infrared cut filter cuts a wavelength of 700 nm or more. On the other hand, the IR filter cuts a wavelength of about 700 nm or less. Irradiating strong infrared light with a wavelength of about 850 nm with an IR LED, a dot pattern printed with ink that absorbs infrared rays, even for cameras such as smartphones using infrared rays that are transmitted around 5%. Can be read.

  FIG. 31 is a front view and a side view showing a state in which the lens unit 200 is attached to the camera of the tablet PC 212.

  As described above, the lens unit 200 can be attached and detached by an adhesive member (not shown) applied to the contact surface with the tablet PC 212. Of course, the lens unit 200 may be completely adhered or integrally formed with the tablet PC 212 so that it cannot be removed.

  In addition, although the example which attached the lens unit 200 to the camera of tablet-type PC212 was demonstrated in the same figure, of course, you may attach to the camera part of the smart phone 222.

  FIG. 32 and FIG. 33 are diagrams for explaining the form and attachment method of the lens unit 200.

  In the lens unit 200 of FIG. 32A, an adhesive member is provided in the lower opening on the bottom surface. It can be directly attached to and detached from the camera portion of the tablet PC 212 or the smartphone 222. Of course, the lens unit 200 may be completely adhered so that it cannot be removed, or may be integrally formed with the tablet PC 212 or the smartphone 222.

  In FIG. 32B, the clip 213 and the lens unit 200 are integrated. A portion of the clip 213 that is in contact with the bottom of the lens unit 200 has a hole for photographing the print medium surface or is transparent. The user can easily attach and remove the lens unit 200 by sandwiching the camera portion of the tablet PC 212 or the smartphone 222 with a clip. In addition, the service life is considerably longer than that of an adhesive member whose adhesive strength decreases during use.

  In FIG. 32 (c), the lens unit with an irradiation function described in FIG. 26 and the like and the clip 213 are integrated. The clip 213 is provided with a power supply cable (including a USB, an earphone, a cable with a dedicated portable connector, and the like). When the clip 213 is attached, the cable connector is inserted into the connector of the tablet PC 212 or the smartphone 222. Thereby, it becomes possible to take power from the tablet PC 212 or the smartphone 222. Note that the lens unit with an irradiation function without a clip can be similarly powered by the power supply cable.

  FIGS. 33A to 33C are diagrams illustrating an embodiment in which the cartridge-like case 221 and the lens unit 200 are integrated. This case is used for a smartphone 222 or a mobile phone. A portion of the case 221 that is in contact with the bottom of the lens unit 200 has a hole for photographing the print medium surface or is transparent. The user can easily attach and detach the lens unit 200 by fitting the case into the smartphone 222 or the mobile phone so that the lens unit 200 is located on the back side (opposite the display) of the smartphone 222. In addition, the service life is considerably longer than that of an adhesive member whose adhesive strength decreases during use. Further, the mounting position of the lens unit 200 is fixed, so that the lens unit 200 can be mounted accurately without being positioned each time.

  FIG. 4B is a diagram for explaining a state where the lens unit with an irradiation function and the case 221 are integrated. In this case, the case 221 is provided with a battery 206 and a switch. Note that a power supply cable may be provided as shown in FIG.

  FIG. 6C is a diagram illustrating a lens unit with an irradiation function that receives power from the smartphone 222 or a mobile phone. According to this, since it is not necessary to provide a power source for the case 222, the case 222 can be manufactured more inexpensively and easily. Note that a power supply cable may be provided as shown in FIG. Further, as shown in FIG. 5A, it may be used as a mobile phone protective case for mounting a lens unit without LED.

  FIG. 34 is a view showing an embodiment in which a dot pattern printed on a card 214 is read by a lens unit 200 attached to a camera of a tablet PC.

  (A) is a figure explaining the case where the dot pattern is provided in the whole one surface of the card | curd 214. FIG. The user brings the surface of the card 214 on which the dot pattern is provided into contact with the lens unit 200. The dot pattern printed on the card 214 is enlarged and photographed by the lens 202.

  When the user places the card 214 on the lens unit 200, the content output or operation command corresponding to the read code information is executed. Further, by rotating the placed card 214, it is possible to change the information to be output depending on the rotation angle between the direction of the dot pattern and the camera angle (camera upward direction). For example, when placed in 30 ° orientation of the card 214 to the camera, the audio of the "Hello" is output from the speaker (not shown), then was placed in the direction of 90 degrees by rotating the card 214 In this case, a voice saying “Goodbye” is output. Of course, the corresponding video content may be displayed on the display. Furthermore, even if the read code information is transmitted to the dot code management server via the Internet or a mobile phone network to view or download the corresponding content, or the tablet PC is controlled by an operation command corresponding to the code information Good. The same applies when a smartphone is used.

  Further, when the code information is defined by adding the XY coordinates, the information to be output is changed corresponding to the input XY coordinate values depending on which part of the card 214 is placed on the lens unit 200. Can be made. At the same time, information corresponding to the rotation angle may be used as the selection condition.

  If a lens unit with an irradiation function using a white LED 208 is used as the light source 205, the code information can be reliably read even in an environment where the surroundings cannot read the dot pattern. Furthermore, if a lens unit with an irradiation function using an IR LED 210 as a light source 205 is used to shoot a print medium on which dots are printed with an ink that absorbs infrared rays (carbon black or the like), only the dot portion is photographed black in the captured image. As a result, the dot code can be easily read. The lens unit with the IR LED irradiation function is used when an infrared cut filter is not used in a smartphone or the like, or when infrared rays are not completely cut off even if used.

  FIG. 6B is a diagram illustrating a case where a guard 215 is provided on one surface of the card 214 and a dot pattern is printed only in the guard 215. The guard 215 has a structure that fits into a dot pattern reading lens. When the user puts the guard 215 on the dot pattern reading lens, the dot pattern printed on the card 214 is enlarged and photographed by the lens 202.

  When the user puts the guard 215 on the lens unit 200 and then rotates the card 214, input / output information can be changed. In (a), when the card 214 is rotated, there is a problem that the card 214 is displaced and is not rotated well. By providing the guard 215 as shown in (b), this problem is solved, the card 214 can be rotated without being displaced, and the user can easily perform an operation desired. Furthermore, the visually impaired person can check the guard 215 and can easily operate it. The technique described in (a) and (b) for changing input / output information by reading a dot pattern is described in Japanese Patent No. 4465016. For visually impaired persons, this guard can recognize that the dot pattern is provided on the print medium and can be easily operated.

  FIG. 35 is a diagram for explaining an embodiment for reading a dot pattern provided in the figure 216.

  (A) is the figure which mounted the figure 216 on the lens for dot pattern reading attached to the camera of tablet-type PC. A dot pattern is printed on the bottom of the figure 216, and the camera reads the dot pattern on the bottom of the figure 216 and decodes the information.

  Note that by rotating the figure 216 on the lens unit 200, input / output information can be changed. For example, when placing the figure 216 is output from a speaker voice of "Hello" is not shown, when rotated 90 degrees, the sound of the "bye" is output.

  (B) is a diagram in which the figure 216 and the dot pattern reading lens are integrated. The figure 216 in the figure has a lens unit 200 attached to the lower part of the pedestal. A dot pattern is provided on the back side of the pedestal. When the figure 216 is placed on the camera of the tablet PC 212, the camera reads the dot code provided on the figure 216 via the lens of the figure 216.

  Note that by rotating the figure 216 on the camera, input / output information can be changed in the same manner as in FIG.

  A technique for changing output information by rotating the figure 216 as in (a) and (b) is described in Japanese Patent No. 4465016.

  Note that all of the operations and processes similar to those described in FIG. 34 are possible with respect to the above-described operation and information processing on the read code information, and the case where the white LED 208 or the IR LED 210 is used as the light source 205.

  FIG. 36 is a diagram for explaining a figure 216 incorporating a lens unit 200 with a white LED irradiation function.

  A lens unit 200, a white LED 208, and a battery 206 are built in the base of the figure 216. When the user places the figure 216 on a camera such as a smartphone, the camera reads a dot code provided on the figure 216 via the lens unit 200 of the figure 216. Even if the lens unit 200 is built in the figure 216 and light from the outside is blocked, the white LED 208 can irradiate the print medium surface and read the dot code. Further, it is desirable that the battery 206 of the white LED 208 is built in the figure, and the power button 207 is provided in a place where the figure is not conspicuous. Although not shown, a sensor-type power switch that is activated when the figure is lifted or touched may be used.

  Note that all of the operations and processes similar to those described in FIG. 34 are possible with respect to the above-described operation and information processing on the read code information, and the case where the white LED 208 or the IR LED 210 is used as the light source 205.

  FIGS. 37 to 38 are diagrams showing an embodiment in which a dot pattern printed on a card 214 is read by the lens unit 200 attached to the camera of the smartphone 222. FIG. The state, FIG. 38, shows a state of contact.

  In this case, the card 214 is fixed, the smartphone 222 is held, and a part of the card 214 is touched to read the dot pattern.

  Also, as shown in FIG. 38, the dot pattern captured using the lens unit 200 may be displayed as it is on the display of the smartphone 222 or the tablet PC 212. Of course, content corresponding to the read dot code may be displayed. When reading the dot pattern of the card 214 with the smartphone 222, the content output or operation command corresponding to the read code information is executed. Furthermore, by rotating the smartphone 222, it is possible to change the information to be output depending on the rotation angle between the direction of the dot pattern and the camera angle (camera upward direction). If the XY coordinates are defined in addition to the code information, the information to be output is changed corresponding to the input XY coordinate value depending on which part of the card 214 is photographed on the lens unit 200. be able to. At the same time, information corresponding to the rotation angle may be used as the selection condition.

Note that all of the operations and processes similar to those described in FIG. 34 are possible with respect to the above-described operation and information processing on the read code information, and the case where the white LED 208 or IR LED 210 is used as the light source 205.

<Circle pattern>

  39 to 50 show the concept and examples of a circle pattern in which an ID code is encoded. These are plural on the circumference, the circumference of an ellipse, or on the circumference of a circle between adjacent marks printed or engraved on the circumference of a predetermined closed curve (hereinafter, “circumference etc.”). Or a circle pattern encoded by a combination and / or arrangement of a plurality of distances between adjacent marks (hereinafter, “distance between marks”).

  FIG. 39 is a diagram illustrating a specific example of the circle pattern 300. FIG. 5A shows a circular circle pattern, FIG. 5B shows an elliptical circle pattern, and FIG. 5C shows a circle pattern formed by other closed curves.

  Thus, the circle pattern 300 can be formed by arranging the mark 301 on an arbitrary closed curve.

  FIG. 40 is a diagram showing another form of the circle pattern. This figure is a diagram in which one mark 301 is arranged at the centroid of a closed curve. When (a) is a circular circle pattern, (b) is an elliptical circle pattern, (c) is other This is the case of a circle pattern with a closed curve shape.

  Thus, by arranging the mark 301 at the centroid, it becomes easy to determine the area of the circle pattern 300 when the CPU analyzes the circle pattern 300 photographed by the camera.

  The place where the mark 301 is arranged may be the center of the closed curve as well as the centroid of the closed curve. The number of marks 300 arranged at the centroid or the center is not limited to one, but may be plural. In particular, when parameters such as the shape and size of the closed curve are not defined in advance, it is possible to give such information to the marks in the closed curve and to identify and decode the used code. By providing two marks 300, the ellipse can identify the ellipse and can easily decode the code. Note that it is desirable to change the size, shape, and color of the mark 300 in order to distinguish it from the mark 300 on the circumference.

  41 to 50 are diagrams for explaining still another embodiment.

  Here, FIG. 41 and subsequent figures describe the case where the circle pattern is circular, but it goes without saying that any of the embodiments is also applicable to an oval shape or any other closed curve shape circle pattern. .

  FIG. 41 is a diagram illustrating a circle pattern 300 in which a start point mark 302 and an encoding mark (information dot 303) are arranged as marks.

  As shown in FIG. 41, a start point mark 302 for defining a start point for encoding is arranged on a predetermined circumference, and an information dot 303 is arranged as an encoding mark clockwise, and a predetermined interval between adjacent marks is set. The ID code is encoded by a combination in which the intervals are aligned clockwise from the start point mark 302. Needless to say, encoding may be performed counterclockwise. In addition, the predetermined interval between the marks is set to a circumferential length between information dots having a plurality of circumferential lengths between adjacent marks or a distance between information dots. The combination index may be any of the perimeter length 304 between information dots and the distance 305 between information dots.

  (A) is a mark in which the start point mark 302 is larger than the information dot 303, (b) is a mark in which the start point mark 302 is different from the information dot 303, and (c) is a shape in which the start point mark 302 is the same as the information dot 303. (D) is a mark in which the start point mark 302 has the same shape as the information dot 303 but is identified by color, and (e) is a mark in which the start point mark 302 has the same shape as the information dot 303. (F) is a mark in which two marks having the same shape as the information dot 303 are arranged side by side in the outer circumferential direction. Both are formed so that the information dot can be identified as the start point mark 302 by the reading means of the information processing apparatus. Note that three or more (c) and (f) may be arranged side by side to form the start point mark 302, or (e) they may be shifted in the inner circumferential direction.

  (G)-(i) is an example in which two circle patterns 300 having different concentric diameters were formed. That is, similar-shaped circles having different sizes are arranged concentrically. Thereby, a larger amount of information can be defined. Of course, a plurality of circle patterns 300 may be formed to further increase the amount of information. In (g), all the information dots 303 have the same shape, and a dot having a size different from that of the information dot 303 is set as the start point mark 302 in the outer circle pattern 300. An information dot 303 is arranged as a start mark 302 on the inner periphery at the inner position. In (h), since the outer circumference and the inner circumference are easily distinguished, the sizes of the information dots 303 on the outer circumference and the inner circumference are made different, and the start point mark 302 has a different shape from the information dot 303. In (i), in order to easily discriminate between the outer circumference and the inner circumference, the shapes of the information dots 303 on the outer circumference and the inner circumference are made different, and the start point mark 302 has a size different from that of the information dot 303.

  In the embodiments of (g) to (i), as described above, when the circle pattern 300 is circular, the centers of similar-shaped circles having different sizes are made to coincide with each other so that a small circle becomes a large circle. Enclose. However, in the case of an elliptical shape or an arbitrary closed curve shape, the centroids of similar-shaped ellipses or closed curves having different sizes are matched, and the smaller ellipse or closed curve is included in the larger ellipse or closed curve.

  FIG. 42 shows an example in which a total of three marks, one start point mark 302 and two information dots 303, are arranged. The information dots 303 are arranged so that the intervals between the marks are one to three types. If three coordinate values on the circumference are obtained, the center position and radius can be obtained, and the interval between the marks can be easily calculated.

  In (a), three types of intervals are formed and information dots 303 are arranged. The shortest interval is (1) (corresponding to the circled number 1 in the figure, the same applies hereinafter), and the second shortest interval ( 2) This is a combination when the longest interval is (3), and there are six types of combinations clockwise from the start point mark.

  (B) is a combination in which information dots 303 are arranged with two types of intervals formed, the shortest interval being (1), and the second shortest interval being (2). There are six combinations clockwise. Thus, either (1) and (2) may be the same interval.

  (C) is a combination in which information dots 303 are arranged by forming one type of interval, and the interval is set to (1). Of course, there is only one type of combination. There are 13 types of combinations in the above (a) to (c), and 13 ID codes can be encoded. If this is formed by two circle patterns, 13 × 13 = 169 ID codes can be encoded.

In FIG. 42, a total of three marks are arranged, but the number of codes that can be encoded by the ID code is
If N is 4,

If N is 3 or 5,

により求まる。

It is obtained by.

  Therefore, the number of four marks is 75. Here, when the mark 301 is arranged so that both the three and four marks 301 are included in the circle pattern 300, 13 + 75 = 88 ID codes can be encoded. In addition, 541 ID codes can be encoded with 5 marks 301, 4683 ID codes with 6 marks 301, and 22174447 ID codes with 10 marks 301.

  FIG. 43 is a table in which code values are assigned to combinations when the three marks 301 shown in FIG. 42 are arranged. What code value is assigned to the combination case is arbitrary.

  FIG. 44 is a diagram illustrating a circle pattern in which one code is encoded by including a plurality of marks 301.

  In the present embodiment, L to M marks 300 continuous to the circle pattern 300 can be arranged. Then, there are M-L + 1 types of circle patterns 300.

  For example, in the figure, (a) shows a case where three marks 301 are arranged, (b) shows a case where four marks 301 are arranged, and (c) shows a case where five marks are arranged. That is, L = 3 and M = 5. Therefore, there are 5-3 + 1 = 3 types of circle patterns 300.

  In each of the three types, the ID code can be encoded by the combination described with reference to FIGS. As described above, in the case of (a), there are three marks 301, and 13 ID codes can be encoded. In the case of (b), there are four marks 301, and 88 ID codes can be encoded. In the case of (c), there are five marks 301, and 541 ID codes can be encoded. Therefore, when the circle pattern 300 includes 3 to 5 marks 301, 13 + 75 + 541 = 629 ID codes can be encoded.

  As described above, by setting so that different numbers of marks 301 can be arranged, the circle pattern 300 can encode more ID codes.

  FIG. 45 shows the arrangement of only four information dots 303 without the start point mark 302, and the information dots 303 are arranged such that the intervals between the information dots 303 are 1 to 4 types of intervals. The code is encoded only by the combination of the circumference or the distance between information dots. This is because the absence of the start point mark 302 reduces the amount of information, but it can be formed with only information dots having the same shape and is visually attractive. The information processing apparatus reads the start point mark 302 from the information dot 303. Can be easily decoded into an ID code. Needless to say, encoding may be performed clockwise or counterclockwise.

  In (a), four types of intervals are formed and information dots 303 are arranged. The shortest interval is (1), the second shortest interval is (2), the third shortest interval is (3), This is a combination when the long interval is (4), and there are 6 types of combinations in the clockwise direction.

  In (b), three types of intervals are formed and information dots 303 are arranged. The shortest interval is (1), the second shortest interval is (2), and the longest interval is (3). There are 9 types of combinations. Thus, any one or two of (1) to (3) may be the same interval.

  (C) is a combination in which information dots 303 are arranged by forming two types of intervals, the shortest interval being (1), and the second shortest interval being (2). There are four types of combinations clockwise. Thus, either (1) and (2) may be the same interval.

  (D) is a combination in which information dots 303 are arranged by forming one type of interval, and the interval is set to (1). Of course, there is only one type of combination. There are 20 types of combinations in the above (a) to (d), and 20 ID codes can be encoded. If this is formed by two circle patterns 300, 20 × 20 = 400 ID codes can be encoded. Even if there is no start point mark 302, encoding can be performed by permutation combination as in FIGS. 42 to 43 by determining the reference direction (for example, upward as shown in FIG. 42).

  FIG. 46 is a table in which code values are assigned to combinations when the four marks shown in FIG. 45 are arranged. What code value is assigned to the combination case is arbitrary.

  FIG. 47 is a diagram for explaining an embodiment in which a plurality of the same circle patterns 300 are arranged side by side.

  Thus, a plurality of circle patterns 300 may be arranged side by side. As a result, it is possible to arrange continuously on a medium having a certain area, such as a printed matter, so that the same information is output no matter where it is read.

  In addition, the circle pattern may be arranged with a smaller circle diameter and an interval.

  48 to 50 are diagrams for explaining an embodiment in which one code is encoded by a plurality of circle patterns 300. FIG.

  In this embodiment, one data block is composed of a plurality (9 in the figure) of circle patterns 300 arranged at different positions. One data block encodes one code.

  FIG. 48 is a diagram for explaining a method of defining a data block area.

  In the circle pattern 300 of the present embodiment, the same data block can be repeatedly printed on a printed matter or the like. In that case, if it is not possible to recognize which is the area of one data block, the CPU cannot accurately analyze the circle pattern 300 and execute processing corresponding to the code. Therefore, it is necessary to define the area of the data block.

  FIG. 5A is a diagram in which the start point mark 302 of a predetermined circle pattern 300 is different from the start point mark 302 of another circle pattern 300. In the figure, only the upper left circle pattern 300 has a start point mark 302 having a size different from that of the information dot 303, and the other circle pattern 300 has a start point mark 302 having a shape different from that of the information dot 303. . As a result, the area of the data block can be recognized with reference to the circle patterns 300 having different start point marks 302.

  FIG. 6B is a diagram in which the shape of the mark 301 of the predetermined circle pattern 300 is different from the shape of the mark 301 of another circle pattern 300. In the drawing, only the upper left circle pattern 300 is provided with a triangular mark 301, and the other circle pattern 300 is provided with a circular mark 301. Thereby, the area of the data block can be recognized with reference to the circle pattern 300 on which the triangular mark 301 is arranged.

  (C) is a diagram in which the arrangement method of the predetermined circle pattern 300 is different from the arrangement method of other circle patterns 300. FIG. In the figure, only the upper left circle pattern 300 has a start point mark 302 having a circular shape and an information dot 303 having a triangular shape, and other circle patterns 300 have a start point mark 302 having a triangular shape and the information dot 303 having a circular shape. Thereby, the area of the data block can be recognized based on the circle pattern 300 in which the start point mark 302 is circular and the information dot 303 is triangular.

  In addition to (a) to (c), it is possible to define the area of the data block by various methods.

  FIG. 49 is a diagram for explaining a method for defining the direction of a data block.

  Even for the same circle pattern 300, the analysis result of the CPU and the result of the process to be executed differ depending on which direction is the normal position, that is, the reference for recognizing the circle pattern 300. Therefore, it is necessary to define the direction of the data block in order to recognize which direction the circle pattern 300 is formed on.

  FIG. 6A defines the direction of the data block according to the position of the start point mark 302. In the figure, the start point mark 302 is located on the left. Thereby, it can be recognized that the data block is facing left.

  FIG. 6B defines the direction of the data block by the mark 301 arrangement method. In this case, the position of the circle pattern 300 having a specific combination of mark intervals is defined as the data block direction. The specific combination is not used for the circle pattern 300 other than the circle pattern 300 that defines the direction of the data block. For example, in (b), the mark 301 is arranged so that only the circle pattern 300 at the upper left is a combination of (1), (2), (3), and (4) (corresponding to the circled numbers in the figure). Combinations of (1), (2), (3), and (4) are not used for other circle patterns. Thereby, it can be recognized that the data block is upward. Although not shown, only the circle pattern 300 at the upper left may be formed with four marks 301 and other marks 301 other than four.

  FIG. 4C defines the direction of the data block by providing the start point mark 302 only for the specific circle pattern 300. In the figure, only the circle pattern 300 at the upper left has a start point mark 302 arranged at the top. In other circle patterns 300, the start point mark 302 is not arranged. Thereby, it can be recognized that the data block is upward. According to this, since the direction of the data block is defined by the circle pattern 300 at the upper left, other circle patterns can encode codes without providing the start point mark 302. Therefore, the data block generation algorithm can be simplified.

  FIG. 50 is a diagram for explaining an embodiment in which 3 × 3 circle patterns of data blocks are continuously arranged.

  Data blocks are arranged continuously in the vertical and horizontal directions. Therefore, when reading with a camera, it is necessary to read one data block. If adjacent data blocks are the same, the same number of 3 × 3 circle patterns 300 as the number of data blocks around the center read by the camera may be read, as indicated by the alternate long and short dash line in FIG. However, it is necessary to recognize where each circle pattern 300 is arranged. That is, a means for defining a data block area as shown in FIG. 49 is required. In the figure, only the start point mark 302 of the upper left circle pattern 300 is different in size. This defines the area and direction of the data block. Assuming that + in the figure is the center to be read by the camera, the surrounding 3 × 3 circle pattern always includes a circle pattern 300 having a different size only at the start point mark 302, so that the region and direction can be understood. The code of each 3 × 3 circle pattern can be decoded in accordance with a predetermined order, and one code can be read.

  If many information dots 303 are arranged on one circumference, the amount of information of the circle pattern 300 can be increased. However, when the number of information dots 303 increases, the distance between the information dots 303 becomes closer, the appearance becomes worse, the information dots 303 are connected due to printing accuracy and reading accuracy, and the code is read and analyzed accurately. The problem that cannot be done. Therefore, by arranging one circle code 300 with different numbers of circle patterns 300 as described above, it is possible to increase the amount of information of the circle pattern 300 as a data block while solving the above problem.

  The mark 301 of the circle pattern 300 may be provided by notching in addition to printing or engraving. Specifically, those described in FIGS. 23A to 23C.

  The circle pattern 300 described with reference to FIGS. 39 to 50 can also be realized by providing such a notch.

Conventionally, a two-dimensional code such as a dot pattern is suitable for placement on a straight or rectangular plane, but it has been difficult to place it on a circular or donut-shaped medium. In the circle pattern 300 of the present invention, it is possible to easily place a mark on a circle, an ellipse, or an irregular closed curve shape to form a two-dimensional code. Therefore, it is used as an ID code for identifying the lens cover 203 used in the lens unit 200 of the present invention. In addition, it can be used as a two-dimensional code for a circular or donut-shaped medium. Further, since the circle pattern 300 encodes the code by comparing the distances between the marks 301, the code can be accurately decoded even if it is arranged on a curved surface, and it has been difficult to arrange a two-dimensional code in the past. Can also be placed on curved surfaces. Furthermore, even if the dot pattern (circle pattern 300) is greatly deformed by tilting the optical reading means, the code can be correctly decoded for the above reason.

<Other Examples of Lens Unit>

  FIGS. 51 to 58 illustrate another embodiment of the lens unit 200 for reading a dot pattern.

  The following lens unit 200 is not limited to the embodiments described below. Needless to say, the following lens unit 200 can be combined with any of the embodiments described above.

(ID code and clip)
In the embodiment described above, when the printed ID code 401 is used, the ID code 401 is printed on the lens cover 203 or the transparent lens cover 204. However, the ID code 401 can be provided by other methods.

  FIG. 51 is a diagram illustrating a state where the ID code 401 is directly printed on the upper opening of the lens holder. In the drawing, the circle pattern 300 is directly printed as the ID code 401, but other ID codes 401 may be printed.

  Alternatively, the ID code 401 may be printed on a sticker and attached to the upper opening of the lens holder 201.

  Further, the ID code may be fitted between the lens cover 201 and the lens 202 or screwed.

  52 to 53 are diagrams for explaining a lens unit with a clip provided with a lens cover 203 capable of sandwiching a medium on which an ID code 401 is printed.

  This clip 213 is a modification of the clip described in FIG. That is, the clip 213 for sandwiching the camera portion of the tablet PC 212 or the smartphone 222 is provided integrally with the lens unit 200. The structure of the clip 213 will be described later.

  52A is a perspective view of a lens unit with a clip, and FIG. 52B is a front view. The lens unit 200 includes a lens cover 203, a lens holder 201, and a clip 213. The lens cover 203 and the lens holder 201 are separable, and an ID medium 402, which is a medium on which an ID code 401 is printed, is sandwiched between the lens cover 203 and the lens holder 201 as shown in FIG. Yes.

  The center of the lens holder 201 is a transparent area provided with an opening 403 or a transparent sheet such as a film, and an area necessary for photographing a subject is secured.

  With such a structure, the lens unit 200 having the ID code 401 can be easily manufactured. Further, the manufacturer can collect the lens unit 200 that is no longer needed by the user, remove the ID medium 402 that has been used, and sandwich the new ID medium 402 to provide it to other users. A lens unit that takes into account the global environment and economy can be realized.

  FIG. 52 shows an example of the lens unit 200 provided with a lens cover 203 capable of sandwiching an ID medium, and it is needless to say that the present invention is not limited to this form. For example, a form without the clip 213 may be used.

  FIG. 53 is a diagram for explaining the ID medium 402 used in the lens holder 201 of FIG.

  The ID medium 402 is obtained by printing an ID code 401 on a circular medium. The center of the medium is an opening, and an area necessary for photographing the subject is secured. An ID code 401 is printed around the opening. FIG. 6A shows an ID medium 402 on which a circle pattern 300 that is an ID code 401 is printed. FIG. 5B shows an ID medium 402 on which a focusing pattern 404 and a circle pattern 300 for focusing with autofocus are printed.

  The focusing pattern 404 is preferably printed with ink that transmits infrared light and visible light. Accordingly, since the focusing pattern 404 is not photographed by the camera, the camera can photograph only the necessary ID code 401 and the dot pattern of the subject.

  The center of the medium may be a transparent region provided with a transparent sheet such as a film instead of the opening 403. By providing the transparent sheet, the lens 202 can be prevented from becoming dirty.

  The ID medium 402 may be integrally formed with the lens holder 201.

(Adjuster and non-slip)
54 to 56 are diagrams illustrating the adjuster 406 and the slip stopper 407. FIG.

(Adjuster)
The adjuster is a device for adjusting the height and length, and the adjuster 406 of the present invention is provided for adjusting the height of the lens unit 200.

  FIG. 54 shows a lens unit 200 having no clip, and FIGS. 55 to 56 show a lens unit 200 having a clip. FIG. 57 is a perspective view showing the structure of the adjuster 406.

  As shown in FIG. 57, the adjuster 406 has a cylindrical structure having an opening 403 at the center. A plurality of grooves are provided on the inner wall of the adjuster 406. On the other hand, the lens holder 201 is also provided with a groove so as to be fitted to the adjuster 406.

  As shown in FIG. 54A, the lens unit 200 includes a lens-integrated lens holder 405 and an adjuster 406. FIG. 6B shows the most frequently used embodiment of the present invention, which includes an ID medium 402, a lens cover 203, a lens-integrated lens holder 405, a screw-type fastener 408, an adjuster 406, and a non-slip 407. Yes. On the upper part of the lens-integrated lens holder 405, a screw-like fastener 408 (cap with screw) is fixedly attached. On the other hand, the adjuster 406 is attached to the lower part of the lens-integrated lens holder 405.

  FIG. 55 is a perspective view of the clip-equipped lens unit 200 having the adjuster 406 and the anti-slip 407, and FIG. FIG. 56 is a diagram illustrating a case where the height is adjusted by the adjuster 406 in the lens unit with clip 200.

  The basic structure of the lens holder 201 main body is the same as that of the lens unit 200 of FIG. Clip 213 is provided between threaded fastener 408 and adjuster 406. When the distance between the camera and the lens 202 is reduced, the adjuster 406 is moved downward as shown in FIG. When the distance is increased, the adjuster 406 is moved upward as shown in FIG. The difference in distance between when the adjuster 406 is moved to the uppermost position and when it is moved to the lowermost position is about 2 cm.

  The optimal focus of the camera provided on the smartphone 222 or the like may differ depending on the model. In that case, the optimum distance from the lens to the camera also differs. Therefore, depending on the structure of the lens unit 200, there is a problem that the focus is not accurately adjusted and optimal photographing cannot be performed. On the other hand, it is very expensive to manufacture individual lens units 200 for each model so that the focus is accurately adjusted.

  Furthermore, the user often uses the smartphone 222 or the like with a cover (protective case) attached. Since the thickness of the cover differs depending on the product, there is a problem that the focus cannot be accurately adjusted depending on the cover to be used, and the optimum photographing cannot be performed.

  The adjuster 406 of the present invention solves such a problem. In other words, by providing the adjuster 406 in this way, the distance from the lens 202 to the camera is optimally adjusted to photograph the subject accurately regardless of what camera or cover is used. It becomes possible.

  Note that the subject can be taken with the upper opening of the lens unit 200 in contact with the subject, or the lens unit 200 and the subject can be taken at a certain distance. It is determined by the size of the dot pattern of each subject or the like whether to touch the surface or how far away to shoot.

  The center of the adjuster 406 may be a transparent region provided with a transparent sheet or the like instead of the opening 403. By providing a transparent sheet or the like, it is possible to prevent the lens 202 from becoming dirty.

  The structure of the adjuster 406 is not limited to that described above, and may be formed integrally with the lens holder 201. Of course, any structure may be used as long as the distance from the lens 202 to the camera can be adjusted appropriately.

(Cleat)
Next, the anti-slip 407 will be described.

  The anti-slip has a donut-like structure having an opening 403 at the center, and is provided at the lower part of the lens holder 201. In the present embodiment, the lower end of the adjuster 406 is fitted. Further, it is made of a viscous material such as rubber.

  Since the surface of the smartphone 222 or the like is made of a smooth material, there is a problem that even if the lens unit 200 is attached, it slides down. Moreover, even if it is fixed with the clip 213 or the like to prevent slipping, the lens unit 200 may slightly shake and focus may not be accurately achieved. By providing the anti-slip in this way, it is possible to prevent sliding or shaking from the smartphone 222 or the like.

  The anti-slip 407 may be provided by being attached to or screwed into the adjuster 406 in addition to being fitted to the lower portion of the adjuster 406 as in the present invention. Alternatively, the lens unit 200 may be provided by being directly attached, fitted, or screwed into the lower portion of the lens unit 200. Further, it may be provided by being mounted between the adjuster 406 and the lens holder 201. Furthermore, the adjuster 406 and the anti-slip 407 may be integrally formed.

(clip)
Next, the above-described clip 213 will be described with reference to FIG.

  One end of the clip 213 is attached to the lens holder 201, and the other end is formed so as to sandwich the back side of the side where the camera is provided.

  The clip 213 includes an arm 410 and a fastener. The fastener is for attaching the lens holder 201, and is provided at one end of the arm 410. The fastener includes a ring-shaped fastener 409 shown in FIG. 5A and a U-shaped fastener 411 shown in FIG. The ring-shaped fastener 409 has an advantage that strength is strong although there is a problem that it is not convenient because it is necessary to first remove the ring and then remove the clip 213 when removing the lens holder 201. On the other hand, the U-shaped fastener 411 has a problem that the strength is weak, but has an advantage that the lens holder 201 can be easily pulled out and is highly convenient.

  The other end of the arm 410 is formed so as to sandwich the back side of the smartphone 222 or the like.

  In addition, you may attach a 2nd fastener to the upper part of a fastener. As shown in FIGS. 54 and 55, the second fastener is preferably a screw-like screw fastener 408, but may take other forms. By attaching the second fastener, the fasteners 409 and 411 of the clip 213 can be more firmly fixed.

  In addition, an O-ring 412 may be attached between the fasteners 409 and 411 and the adjuster 406 or between the fasteners 409 and 411 and the second fastener. Thereby, the adjuster 406 and the second fastener can be firmly fixed.

  Further, the clip 213 may be integrally formed with one or more of the lens holder 201, the lens cover 203, and the adjuster 406.

  58 and 59 are perspective views showing the configurations of the lens unit 200. FIG.

  As shown in FIG. 58, the lens unit 200 includes a lens cover 203, an ID medium 402, a screw-like fastener 408, a lens-integrated lens holder 405, an adjuster 406, and a non-slip 407. In addition, the above-described clip 213 may be provided.

  FIG. 59 shows an example in which an O-ring 412 is further provided. An O-ring 412 is inserted 406 between the threaded fastener 408 and the adjuster.

  The lens holder 201 may be provided with a thread and the adjuster 406 may be attached and detached with a screw.

  Needless to say, the lens holder 405 is not integral with the lens 202 but may be provided separately.

(Other structures)
In addition, various structures are conceivable for the lens unit 200 of the present embodiment.

  FIG. 61 shows a base 413 provided around the outer peripheral wall of the upper opening of the lens-integrated lens holder 405. By providing the pedestal 413, it is possible to stably place the subject and to prevent shake during photographing.

  The pedestal may be integrally formed with the lens holders 201 and 405 or the lens cover 203. The pedestal, the lens cover 203, and the lens holders 201 and 405 may be integrally molded.

  The lens unit 200 may be provided with an IR filter as described with reference to FIG.

  The lens unit may be provided with a light source and a power source as described with reference to FIGS.

(Usage form)
FIG. 62 is a diagram for explaining the most preferable usage form of the lens unit 200 described above.

  FIG. 5A shows a usage form of the lens unit 200 that does not have the clip 213 shown in FIG.

  The lens unit 200 not having the clip 213 is suitable for use in the tablet PC 212. This is because the tablet PC 212 is often used by being placed on a desk, and the lens unit 200 can be stably arranged.

  FIGS. 5B and 5C show usage forms of the lens unit 200 having the clip 213 shown in FIGS.

  The lens unit 200 having the clip 213 is suitable for use in a smartphone 222 or a mobile phone. This is because the smartphone 222 and the mobile phone are often used by being held in hand, and therefore the lens unit 200 is likely to be displaced or detached simply by arranging the lens unit 200.

  FIG. 6B shows the case where the adjuster 406 is moved downward. If the distance between the camera and the lens 202 is too close, the camera cannot focus accurately and an appropriate captured image cannot be obtained. Therefore, the distance between the camera and the lens is kept appropriate by moving the adjuster 406.

  FIG. 10C shows the case where the adjuster 406 is moved upward. In the figure, a smartphone cover 414 is provided on the smartphone 222. A certain distance has already occurred between the camera and the smartphone cover 414. Therefore, the adjuster 406 is moved upward so that the distance between the camera and the lens 202 is not increased.

  By using the adjuster in this way, the distance H from the surface of the camera lens to the lower end of the lens 202 of the lens unit 200 can be maintained at the optimum distance.

  Thus, since the lens unit 200 of the present invention can be used in accordance with the state of the tablet PC 212, the smartphone 22, and the mobile phone, it is extremely flexible and convenient.

  It should be noted that the usage form of the lens unit 200 is not limited to that described above, and can be variously changed according to the user's preference, usage status, and the like.

(Image of human body part)
Furthermore, the lens unit 200 of the present invention can photograph not only a dot pattern but also a part of a human body.

  In the part of the human body, it is skin, scalp, hair, nails, eyes and the like. Although the human body has been illustrated, the predetermined part is not limited to a person but can be any part of a living organism. Further, the predetermined part may be any subject or photographed image having a unique feature, and may be any subject as long as it can be associated with a unique ID code.

  As an example, a case where the skin of a human body is photographed will be described.

  In order to accurately diagnose the skin condition, a highly accurate skin image magnified about 30 times is essential. Until now, accurate skin diagnosis has been impossible unless an image is taken with an expensive skin diagnostic machine. However, by attaching the lens unit 200 of the present invention to the smartphone 222, it is possible to easily shoot a highly accurate skin image. . Most women use the smartphone 222 in a protective case, but it is possible to shoot optimally without removing the protective case by installing an adjustment function that focuses even if it is attached from the top of the case. In addition, by providing an ID with a dot code at the lens opening and photographing the dot code together with the skin to perform an individual skin diagnosis, it is possible to provide appropriate aging care. Here, the captured skin images are taken in the shooting environment, that is, in the morning and evening in the outdoors and in the surrounding environment (sunset, cloudy, rain, snow, building color, green forest, etc.), indoor lighting and surrounding environment Since the color of light entering the lens changes due to the shooting of the color of the wall, the color, intensity, and arrangement of the lighting, it is difficult to perform proper skin diagnosis. In addition to the shooting environment, there is a difference in camera performance so that the smartphone 222 appears slightly bluish, reddish, and whitish. Therefore, in the present invention, the color of the medium itself is set to white, and in the image of the ID medium 402 captured at the same time as the captured skin image, image analysis is performed to determine how the white color of the ID medium 402 is changed. The correction amount is obtained, and the skin image is corrected based on the correction amount. Further, the light entering from the periphery of the lens is not uniform and varies depending on the direction. Therefore, as shown in FIG. 63, the image is based on the image of the medium in at least the surrounding 4 to 8 directions where the circle dots 300 are formed. It is necessary to analyze and determine the correction amount of the skin image. FIG. 63 shows an example in which light is strongly incident from the lower right. Based on these correction amounts in the 4 to 8 directions, the correction of the skin image is performed by interpolating the correction amount in the entire skin photographing region. The simplest calculation method of the correction amount is that R, G, and B are 100% for white, so if the captured ID medium images are R ′, G ′, and B ′, the correction amount is the difference ΔR = R−R ′, ΔG = G−G ′, ΔB = B−B ′, and ΔR, ΔG, and ΔB may be added to the photographed skin image. Furthermore, in order to improve the accuracy of image analysis, the white light of the ID medium 402 is photographed in an optimal light environment and camera for skin diagnosis, and the correction amount is set based on the photographed values of R, G, and B. It is desirable to calculate. Further, if the dot of the circle dot 300 is printed in black and the correction amount is calculated using the white color of the photographed ID medium 402 and the black dot, the accuracy is further improved. Since black has R, G, and B of 0%, if the circle dot image on the captured ID medium 402 is R ″, G ″, B ″, the correction amounts ΔR, ΔG, ΔB based on white are , Correction amount complemented by black based correction amount R ", G", B "(the correction amount varies depending on the level of R, G, B for the photographed skin image) R, G, B level And the skin image may be corrected. For this purpose, it is necessary that the dots of the ID medium 402 around the skin photographing region are formed at positions in the 4 to 8 directions.

  Note that the correction amount may be calculated in the same manner by setting the ID medium to black and the dots to white. Alternatively, the skin image may be corrected by calculating a correction amount for each color using R, G, and B instead of black dots.

  Here, the second circle dot pattern shown below may be used in order to always arrange the dots at positions in the 4-8 directions of the ID medium around the skin imaging region.

  As shown in FIG. 64, the circle dot pattern is a key dot in a form in which reference dots are arranged at predetermined intervals on a circle-shaped virtual closing curve, and at least one of the reference dots can be distinguished from other dots. Define the arrangement direction and start point of the circle dot pattern, and on the circle (virtual closing curve) virtually defined by the reference dot, start from the virtual point determined from the reference dot arrangement, and at least one of the distance and the direction Information is defined by arranging information dots at positions determined by one. In order to distinguish key dots from other information dots, (1) the size of the dots is changed. (2) Change the dot shape. (3) The dots are shifted in a predetermined direction. (4) Arranging a plurality of dots. (5) Change the dot color. A key dot is expressed by at least one of the above. In addition, information can be defined by whether or not dots are arranged at virtual points. In a) of the figure, one dot is arranged above the reference dot, and a key dot is defined by these two dots. The information dots are arranged in four directions with reference to the direction of the key dots (upward). In FIG. 5B, key dots are defined by arranging two dots in the normal direction of the circle so as to insert a circle (virtual closing curve). The information dots are arranged in four diagonal directions with reference to the outward direction of the normal direction of the circle. Further, the information dots may be arranged in the vertical and horizontal directions with reference to the direction of the key dots (upward). Moreover, you may arrange | position in the up-down-left-right direction on the basis of the normal line direction of a circle. In that case, you may arrange | position along the circle in the left-right direction. Of course, the information dots may be arranged only in the circle direction without the vertical direction. Needless to say, all information dots may be arranged in any direction.

  Reference numeral 65 denotes numerical information defined by the arrangement of information dots. In the figure, a) shows the numerical information in four directions, b) in the figure shows the four directions in the vertical direction, and c) in the figure shows the numerical information in eight directions in the four directions and the four directions in the vertical direction. Although not shown, more information can be defined by changing the distance from the virtual point. In order to further increase the amount of information, a plurality of circle dots having similar shapes and different sizes may be arranged at the same central point.

The skin diagnosis may not be performed by directly capturing a skin image, but may be captured using the lens unit 200 of the present invention by attaching a horny checker to the skin and collecting a horny layer from the skin. In any case, the captured image is transmitted to the external database. A service that performs image processing and pattern recognition on the external database side, collates with a skin image database, performs skin diagnosis, and returns the result to the user is extremely in line with the needs of the user.

  The present invention is visible on postcards, stamps, greeting cards, coupons, game cards, educational cards, figures, and all print media that use conventional two-dimensional codes such as barcodes and QR codes. Industrial applicability of providing an invisible dot pattern that can be read by light is considered.

  Furthermore, the present invention is considered to have industrial applicability of providing a lens unit that can be mounted on a tablet PC, smartphone, or mobile phone even from the top of a protective case.

  Furthermore, the present invention provides a dot pattern as a two-dimensional code for an ID medium provided with a circle pattern, as well as a circular or donut-shaped medium, and simultaneously photographs the ID medium and the subject, and associates the ID with the subject. The industrial applicability is considered.

101 dot pattern 102 image area 1021 predetermined area 1022 component area 103 print medium 104 icon 105 server 106 customer terminal 107 provider terminal 108 printing apparatus 200 lens unit 201 lens holder 202 lens 203 lens cover 204 transparent lens cover 205 LED
206 Battery 207 Battery button 208 White LED
209 Diffuser 210 IR LED
211 IR filter 212 Tablet PC
213 Clip 214 Card 215 Guard 216 Figure 221 Case 221 Smartphone 230 Infrared blocking filter 300 Circle pattern 301 Mark 302 Start point mark 303 Information dot 304 Information dot circumference 305 Information dot distance 401 ID code 402 ID medium 403 Opening 404 Focusing Pattern 405 Lens-integrated lens holder 406 Adjuster 407 Non-slip 408 Screw-like fastener 409 Ring-like fastener 400 Arm 411 U-shaped fastener 412 O-ring 413 Base 414 Smartphone cover

Claims (66)

A lens unit that is attached to an information processing apparatus including a camera and an analysis unit that decodes an information code,
A cylindrical lens holder provided at both ends with a lower opening that is detachably mounted so as to surround the photographing port of the camera, and an upper opening,
A lens disposed at a predetermined position inside the cylindrical lens holder;
An ID code that is attached to the upper opening of the lens holder, has an opening or a transparent area necessary for photographing a predetermined subject, and is one of the information codes for authentication in the analysis means is encoded An ID medium formed so that a photographed pattern can be taken with the camera;
A lens unit with
The lens unit according to claim 1, wherein the ID medium is attached by being stuck, fitted, or screwed into an upper opening of the lens holder.
The lens unit according to claim 1, wherein the pattern in which the ID code is encoded is formed near an opening of the ID medium or a peripheral edge of the transparent region.
The pattern is formed of a plurality of marks arranged based on a predetermined rule on a circumference of a predetermined circle, a circumference of a predetermined ellipse, or a circumference of a predetermined closed curve, and the ID is determined according to the predetermined rule. The lens unit according to claim 1, wherein the code is a circle pattern encoded.
The pattern according to any one of claims 1 to 4, wherein a pattern for facilitating focusing is printed near the periphery of the opening of the ID medium, or near the center or the periphery of the transparent area of the ID medium. The lens unit according to claim 1.
The lens unit according to claim 5, wherein the pattern is printed with a transparent ink.
The lens unit according to claim 1, wherein the ID medium is integrally formed with the lens holder.
The lens unit according to claim 1, further comprising an infrared filter at a predetermined position.
The lens unit according to claim 1, wherein the predetermined subject is photographed in contact with an upper opening of the lens holder.
10. The lens cover according to claim 1, further comprising a lens cover provided in an upper opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject. Lens unit.
The lens unit according to claim 10, wherein the predetermined subject is photographed in contact with an upper opening of the lens holder or the lens cover.
The ID medium is attached to the upper opening of the lens cover, either fitted, screwed, or inserted between the lens cover and the lens holder. The lens unit according to claim 10 or 11.
The lens unit according to claim 10, wherein the lens cover is integrally formed with at least one of the lens holder and the ID medium.
The lens unit according to claim 1, further comprising a non-slip attached to a lower opening of the lens holder for attaching to the information processing apparatus.
The lens unit according to claim 14, wherein the anti-slip is attached by being stuck, fitted, or screwed into a lower opening of the lens holder.
The lens unit according to claim 14 or 15, wherein the anti-slip is integrally formed with the lens holder.
An adjuster provided at a lower opening of the lens holder, having an opening or a transparent area necessary for photographing the predetermined subject, and adjusting to an appropriate distance from the lens to the camera. The lens unit according to claim 1.
18. The lens unit according to claim 1, further comprising a pedestal for stably placing the predetermined subject around the outer peripheral wall of the upper opening of the lens holder. Lens unit.
The lens unit according to claim 18, wherein the pedestal is integrally formed with the lens holder.
11. The subordinate to claim 10, wherein the pedestal and a lens cover provided in an upper opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject are integrally molded. Item 18. The lens unit according to Item 18.
The lens unit further includes a clip for fixing the lens unit to be attached to a camera connected to the information processing apparatus or an information processing apparatus incorporating the camera. The lens unit according to any one of -20.
The lens unit according to claim 21, wherein one end of the arm of the clip is attached to the lens holder, and the other end is formed so as to be inserted into a back side of the information processing apparatus provided with the camera. .
The lens unit according to claim 21 or 22, wherein one end of an arm of the clip attached to the lens holder is a ring-shaped or U-shaped fastener, and is attached to the fastener through the lens holder. .
24. The lens unit according to claim 23, wherein a screw-like second fastener is attached through the lens holder to secure the clip fastener.
25. The lens unit of claim 24, wherein an O-ring is attached through the lens holder between the clip fastener and the second fastener.
The lens unit according to any one of claims 21 to 25, wherein the clip is integrally formed with at least one of the lens holder and the lens cover.
The clip is designed such that when the information processing apparatus is placed on a horizontal plane with the lens unit facing upward by inserting the back side of the information processing apparatus, a predetermined area of the clip is in contact with the horizontal plane. The lens unit according to any one of claims 21 to 26.
A lens unit that is attached to an information processing apparatus including a camera and an analysis unit that decodes an information code,
A cylindrical lens holder provided at both ends with a lower opening that is detachably mounted so as to surround the photographing port of the camera, and an upper opening,
A lens disposed at a predetermined position inside the cylindrical lens holder;
An adjuster provided at a lower opening of the lens holder, having an opening or a transparent area necessary for photographing the predetermined subject, and appropriately adjusting a distance from the lens to the camera. , Lens unit.
An ID code that is attached to the upper opening of the lens holder, has an opening or a transparent area necessary for photographing a predetermined subject, and is one of the information codes for authentication in the analysis means is encoded 30. The lens unit according to claim 28, further comprising an ID medium formed so that the formed pattern can be photographed by the camera.
30. The lens unit according to claim 29, wherein the ID medium is attached by being stuck, fitted, or screwed into an upper opening of the lens holder.
31. The lens unit according to claim 29, wherein the pattern in which the ID code is encoded is formed in the vicinity of the opening of the ID medium or the periphery of the transparent region.
The pattern is formed of a plurality of marks arranged based on a predetermined rule on a circumference of a predetermined circle, a circumference of a predetermined ellipse, or a circumference of a predetermined closed curve, and the ID is determined according to the predetermined rule. The lens unit according to any one of claims 29 to 31, wherein the code is an encoded circle pattern.
The pattern for making it easy to focus at the time of the imaging | photography of the said camera was printed in the vicinity of the periphery of the opening part of the said ID medium, or the center vicinity or periphery of the transparent area of the said ID medium. The lens unit according to claim 1.
The lens unit according to claim 32, wherein the pattern is printed with a transparent ink.
The lens unit according to any one of claims 29 to 34, wherein the ID medium is integrally formed with the lens holder.
36. The lens unit according to any one of claims 29 to 35, further comprising an infrared filter at a predetermined position.
37. The lens unit according to claim 28, wherein the predetermined subject is photographed in contact with an upper opening of the lens holder.
38. The lens cover according to any one of claims 29 to 37, further comprising: a lens cover provided in an upper opening of the lens holder and having an opening or a transparent area necessary for photographing the predetermined subject. The lens unit according to claim 1.
39. The lens unit according to claim 38, wherein the predetermined subject is photographed in contact with an upper opening of the lens holder or the lens cover.
40. The lens unit according to any one of claims 29 to 39, further comprising an anti-slip attached to a lower opening of the lens holder for attaching to the information processing apparatus.
41. The lens unit according to claim 40, wherein the non-slip is attached to the lower opening of the lens holder, either by being attached, fitted, or screwed.
42. The lens unit according to claim 40 or 41, wherein the non-slip is integrally formed with the lens holder.
The anti-slip is attached to the opening of the adjuster, either attached, fitted, screwed, or attached between the adjuster and the lens holder. The lens unit according to 40-42.
44. The lens unit according to claim 43, wherein the adjuster is integrally formed with at least one of the lens holder and the anti-slip.
45. The lens unit according to claim 29, further comprising a pedestal for stably placing the predetermined subject around the outer peripheral wall of the upper opening of the lens holder. Lens unit.
46. The lens unit according to claim 45, wherein the pedestal is integrally molded with the lens holder.
The said base and the lens cover which is provided in the upper opening part of the said lens holder, and has an opening part or transparent area required in order to image | photograph the said predetermined | prescribed subject was integrally molded. Lens unit.
30. The lens unit further includes a clip for fixing the lens unit to be attached to a camera connected to the information processing apparatus or an information processing apparatus incorporating the camera. 48. The lens unit according to any one of -47.
49. The lens unit according to claim 48, wherein one end of the arm of the clip is attached to the lens holder, and the other end is formed so as to be inserted into a back side of the information processing apparatus provided with the camera. .
The lens unit according to claim 48 or 49, wherein one end of the arm of the clip attached to the lens holder is a ring-shaped or U-shaped fastener, and is attached to the fastener through the lens holder. .
51. The lens unit according to claim 50, wherein a screw-like second fastener is attached through the lens holder to secure the clip fastener.
52. The lens unit of claim 51, wherein an O-ring is attached through the lens holder between the clip fastener and the adjuster or the second fastener.
49. The lens unit according to claim 48, dependent on claim 38, wherein the clip is integrally formed with at least one of the lens holder, the lens cover, and the adjuster.
39. Dependent on claim 38, wherein the lens holder is provided with a thread, and at least the adjuster of the pedestal, the lens cover, the second fastener, the clip, or the adjuster is detachable with a screw. 49. The lens unit according to claim 48, which is dependent on claim 45.
The clip is designed such that when the information processing apparatus is placed on a horizontal plane with the lens unit facing upward by inserting the back side of the information processing apparatus, a predetermined area of the clip is in contact with the horizontal plane. 49. The lens unit according to claim 48.
The lens unit according to claim 1, wherein the camera is built in the information processing apparatus.
The camera is connected to the information processing device by wire or wirelessly, and transmits an image of the predetermined subject photographed by the camera and / or an information code decoded by the analysis means to the information processing device. The lens unit according to any one of claims 1 to 56.
58. The lens unit according to claim 1, wherein the camera includes the analysis unit.
The predetermined subject is a print medium on which a dot pattern in which an information code is encoded is printed,
59. The lens unit according to claim 1, wherein the analyzing unit decodes an information code from the dot pattern photographed by the camera.
The lens unit according to any one of claims 1 to 59, wherein the lens holder is formed integrally with the lens.
The lens unit further includes a light source installed at a predetermined position on an outer peripheral wall of the lens holder so that the predetermined subject is irradiated almost uniformly.
The lens unit according to claim 1, further comprising: a power source that supplies electric power to the light source.
62. The lens unit according to claim 61, wherein the power is supplied from the information processing apparatus.
The lens according to any one of claims 1 to 62, wherein the information processing apparatus includes a storage unit that decodes an ID code photographed by the camera and records the photographed image of the predetermined subject in association with each other. unit.
64. The information processing apparatus includes a transmission unit configured to transmit a captured image of the predetermined subject associated with the ID code to a server together with the decrypted ID code recorded in the storage unit. The lens unit described.
The lens unit according to any one of claims 1 to 58 and 59 to 64, wherein the predetermined subject is a part of a human body.
  The lens unit according to any one of claims 1 to 65, wherein the information processing device is a smartphone, a mobile phone, a PC with a camera, or a digital camera.

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