JP4656975B2 - Image display device, image display method, and program for causing computer to execute the method - Google Patents

Description

  The present invention relates to an image display device with a small display, an image display method, and a program for causing a computer to execute the method, and in particular, an OSD (On Screen Display) function can display the actual size of a subject image together with the image. The present invention relates to a photographing apparatus (for example, a digital camera) having a small display, a PDA (Personal Digital Assistants), a reference size display device such as a mobile phone, a reference size display method, and a program for causing a computer to execute the method.

  In recent years, digital still cameras, mobile phones with digital cameras, and the like have become widespread as media for image information. These devices can provide various functions as image information is handled as electronic data.

  One of such functions is an OSD (On Screen Display) function. The OSD function has been used as a user interface so far. For example, an icon or a character representing the device state and operation conditions is displayed on the display screen in a form that is superimposed on the main image, and is set for the user. By indicating or guiding the operated operation mode with an icon or the like, an interaction between the apparatus and the user is enabled.

  As a conventional example showing an apparatus having an OSD function, for example, the following Patent Document 1 can be cited. The invention described in Patent Document 1 relates to a digital camera, and enables operation in a mode in which image data stored in a memory card is reproduced and displayed and a mode in which a captured image is displayed in a through mode. In the figure, the image data and the character data indicating the counter, date, shooting conditions, etc. are combined and displayed on-screen.

JP-A-11-146234

  Here, the OSD function can be realized by a device such as a digital camera or a mobile phone equipped with a small display. In general, what is displayed on the display is an imaging condition or an icon indicating the setting thereof. It is. However, although such an icon, for example, an icon indicating shooting in close-up mode can be displayed on the OSD, information on the size of the subject on the close-up shot image cannot be displayed. It was.

  When the image actually captured is displayed as a reference indicating the size of the subject, that is, when an object is imprinted, the size of the subject in the image can be seen at a glance when the image is viewed after shooting. So it is very convenient.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an image display apparatus, an image display method, and a method for displaying an actual size of a subject image together with an image on a computer. It is to provide a program to be executed.

In order to solve the above-described problems and achieve the object, the invention according to claim 1 is an image display device that displays a captured image of a subject acquired by an imaging unit via an optical system, the optical system A focal point acquisition unit that acquires position information of a focal point in the captured image; a distance acquisition unit that acquires distance information between the subject corresponding to the positional information acquired by the focal point acquisition unit and the imaging unit; A focus acquisition unit that acquires optical focal length information that is a focal length of the optical system, the distance information acquired by the distance acquisition unit, and the optical focal length information acquired by the focus acquisition unit. and scale acquiring means for acquiring the scale information indicating the size of the subject in focus, the position information of the focus, and the optical focal length information, the scale A broadcast, and associating means for associating the captured image, the position information of the focus associated with the captured image by the association means, the optical focal length information, based on said scale information, the captured image the position of the focus in, together with the position to display the scale information serves as a focal point mark indicating a focus point, with a display means for displaying the optical focal length information with the captured image It is characterized by that.

According to a second aspect of the present invention, in the image display device according to the first aspect, the association unit further associates the distance information with the captured image, and the display unit further associates the distance information. It is displayed together with the captured image .

Further, the invention according to claim 3 is the image display apparatus according to claim 1 or 2, wherein the display means before Symbol distance information displayed in the optical point focal length information, and scale information of at least one of The apparatus further comprises selection means for receiving a selection input for selecting a display shape and selecting the at least one display shape according to the received selection input, wherein the display means displays according to the display shape selected by the selection means. It is a thing to do.

Further, the invention according to claim 4, in the image display apparatus according to any one of claims 1 to 3, the case of displaying at least one of the distance information and the optical focal length information, the captured image an arrangement means for arranging a position away from the focal point in further comprising, said display means, based on the placed position by said locating means, at least one of the distance information and the optical focal length information The display is performed at a position distant from the focal point.

Further, according invention in claim 5, in the image display apparatus according to any one of claims 1 to 4, in the captured image, determining means for focusing the subject and the background image of the object further wherein the display means, the the position of the determined background image by determining means, characterized in that for displaying at least one of the distance information and the optical focal length information.

Further, the invention according to claim 6, the image display apparatus according to any one of claims 1 to 5, wherein the display means is enlarged or reduced at least one of the distance information and the optical focal length information It is characterized by being displayed.

In the invention, in the image display apparatus according to claim 4 or 5, wherein the display means, information of the background image determined information position disposed by the positioning means and by said determination means according to claim 7 based on at least one of information between, and characterized in that to display an enlarged or reduced at least one of the distance information and the optical focal length information.

The invention according to claim 8 is the image display device according to any one of claims 1 to 7, wherein the scale information includes image information and text information. At least the image information of the scale information is displayed at a focal point position in the captured image .

The invention according to claim 9 is the image display device according to any one of claims 1 to 8, wherein the captured image , position information of the focal point, optical focal length information, scale information, storing means for synthesizing and stored in a single file, further characterized by comprising.

According to a tenth aspect of the present invention, in the image display device according to the ninth aspect, the storage unit stores the captured image , the focal position information , the optical focal length information, and the scale information . It is stored as an associated file.

The invention according to claim 11 is an image display method for displaying a captured image of a subject acquired by an imaging unit via an optical system on a display unit, and a focal point position in the captured image by the optical system. A focal point acquisition step for acquiring information, a distance acquisition step for acquiring distance information between the subject corresponding to the position information acquired by the focal point acquisition step and the imaging means, and a focal length of the optical system. a focus acquisition step of acquiring an optical focal length information, based on the optical focal distance information acquired by the distance information and the focus acquisition step obtained by the distance obtaining step, indicates the size of the subject in the focus point and scale acquisition step of acquiring the scale information, the position information of the focus, and the optical focal length information, and the scale information, about the captured image Applying an associating step, the position information of the focus associated with the captured image by the association step, and the optical focal length information, based on said scale information, the position of the focal point in the captured image, the position with displays the scale information serves as a focal point mark indicating the focus point, characterized in that it comprises a display step of displaying the optical focal length information on the display unit together with the captured image .

The invention according to claim 12 is the image display method according to claim 11, wherein the associating step further associates the distance information with the captured image, and the displaying step further relates the distance information. It is what is displayed on the said display means with the said captured image, It is characterized by the above-mentioned.

Further, the invention according to claim 13, in the image display method according to claim 11 or 12, wherein the display means before Symbol distance information displayed in the optical point focal length information, and scale information of at least one of The method further includes a selection step of receiving a selection input for selecting a display shape and selecting the at least one display shape according to the received selection input, wherein the display step is performed according to the display shape selected by the selection step. It is displayed on a display means.

The invention according to claim 14, in the image display method according to any one of claims 11 to 13, at least one of the distance information and the optical focal length information, is displayed on the display means If the arrangement step of arranging a position away from the focal point in the captured image, wherein further, the display step, based on the position positioned by the positioning step, the distance information between the optical focal length information At least one of the above is displayed at a position away from the focal point on the display means.

The invention according to claim 15, in the image display method according to any one of claims 11 to 14, in the captured image, a determination step of determining in-focus the object and the background image of the object further includes the display step, wherein the position of the background image determined by the determining step, on the display unit, and displays at least one of the distance information and the optical focal length information And

  The invention according to claim 16 is a program that causes a computer to execute the image display method according to any one of claims 11 to 15.

Further, according to the invention according to claim 1, obtains the position information in the captured image of the focus of the subject image to be photographed, the focal length of the optical system of the distance information and the photographing between the focal point and the image pickup means of the subject get some optical focal length information, the position information of the focus, with the distance information and the optical focal length information, scale information indicating the size of the subject in the captured image, photographed also serves as a focal point mark indicating the focus point Since the image is displayed at the focal point of the image and the optical focal length information is displayed together with the captured image, it is possible to display the actual size of the subject and whether the captured image is taken with a wide-angle lens. There is an effect that it is possible to provide a highly convenient image display device that can know whether the image is taken or not .

In addition, according to the second aspect of the present invention, it is possible to provide a highly convenient image display apparatus that can also display distance information between the in-focus point of the subject and the imaging unit together with the captured image.

Further, according to the invention of claim 3, since it is possible to select a display shape such as distance information displayed on the display means , optical focal length information, and scale information that also serves as the in-focus mark , the operator can select the display shape. There is an effect that it is possible to provide a highly flexible and convenient image display device capable of changing the display shape according to preference.

Further, according to the invention according to claim 4, the distance information to the object, a etc. optical focal length information, on the image to be photographed, it is possible to display the position away from the focal point, the object image There is an effect that it is possible to provide an image display device that is highly convenient to display without visually hindering.

Further, according to the invention according to claim 5, and subject to focus as a photographing target, and determines the background image, the distance information on the position of the background image, so Show etc. optical focal length information, object There is an effect that it is possible to provide a highly convenient image display device that can display an image without visually obstructing it.

Further, according to the invention according to claim 6, distance information, it can be displayed in an enlarged or reduced etc. optical focal length information, without interfering with the object image visually, and in appropriate size There is an effect that it is possible to provide a highly convenient image display device capable of displaying.

Further, according to the invention according to claim 7, the position of the background is not a subject on distant or image from focus on the image, distance information, and enlarged or reduced etc. optical focal length information display Therefore, there is an effect that it is possible to provide a highly convenient image display device that displays a subject image without visually hindering it.

Further, according to the invention according to claim 8, scale information, see contains image information and text information, since the display at least image information on the position of the focal point on the captured image is displayed in an easy form to understand exactly Thus, there is an effect that it is possible to provide a highly convenient image display device.

In addition, according to the invention according to claim 9, the captured image, the position information of the focus, optical science focal length information, and scale information and the convenience of being able to be stored by combining into a single file There is an effect that a high image display device can be provided.

Further, according to the invention according to claim 10, the captured image, the position information of the focus, optical science focal length information, and the scale information, highly convenient that can be stored as associated file image There is an effect that a display device can be provided.

Further, according to the invention according to claim 11, obtains the position information in the captured image of the focus of the subject image to be photographed, the focal length of the optical system of the distance information and the photographing between the focal point and the image pickup means of the subject get some optical focal length information, the position information of the focus, with the distance information and the optical focal length information, scale information indicating the size of the subject in the captured image, photographed also serves as a focal point mark indicating the focus point Since the image is displayed at the focal point of the image and the optical focal length information is displayed together with the captured image, it is possible to display the actual size of the subject and whether the captured image is taken with a wide-angle lens. There is an effect that it is possible to provide a highly convenient image display device that can know whether the image is taken or not .

In addition, according to the twelfth aspect of the present invention, it is possible to provide a highly convenient image display device that can also display distance information between the focal point of the subject and the imaging unit together with the captured image.

According to the invention of claim 13, it is possible to select a display shape such as distance information displayed on the display means , optical focal length information, and scale information that also serves as a focal point mark . There is an effect that it is possible to provide a highly flexible and convenient image display device capable of changing the display shape according to preference.

Further, according to the invention according to claim 14, the distance information to the object, a etc. optical focal length information, on the image to be photographed, it is possible to display the position away from the focal point, the object image There is an effect that it is possible to provide an image display device that is highly convenient to display without visually hindering.

Further, according to the invention according to claim 15, the subject was focusing to be photographed subject, and determines the background image, the distance information on the position of the background image, so Show etc. optical focal length information, object There is an effect that it is possible to provide a highly convenient image display device that can display an image without visually obstructing it.

  According to the sixteenth aspect of the invention, there is an effect that the computer can execute the image display method according to any one of the eleventh to fifteenth aspects.

  An image display apparatus, an image display method, and a program for causing a computer to execute the method according to the present invention will be described with reference to the following first to fourth embodiments shown with accompanying drawings. The embodiment described below shows an example applied to a digital camera. However, an electronic device equipped with a small display as a user interface that can check the setting of an operation mode or the like by icon display using an OSD function. If it exists, it can also be implemented in devices other than digital cameras.

(1. Embodiment 1)
The digital camera according to Embodiment 1 provides reference size information indicating the size of the subject at the focal point in the image based on the distance information to the subject by autofocusing or focusing operation of the optical system by manual operation or the like. The acquired image is displayed alongside the icon indicating the reference size along with the captured image. By displaying the icon indicating the reference size side by side with the subject in this way, the digital camera is highly convenient because the size of the subject can be easily determined even after shooting.

  FIG. 1 is a block diagram illustrating a basic configuration of a digital camera according to the first embodiment. A digital camera 10 shown in FIG. 1 includes a lens 11, a mechanical mechanism 12 including a lens driving unit, a CCD (Charge Coupled Device) 13, a CDS (correlated double sampling) circuit 14, and an A / D (analog / digital) converter 15. , Digital signal processing circuit 16, compression / decompression circuit 17, DRAM (Dynamic Random Access Memory) 18, memory card 19, OSD control unit 20, driver 21, SG (Sync Generator Unit) 22, CPU (Central Processing Unit) 23, operation A unit 24, a bus 25, a ROM (Read Only Memory) 26, an LCD 27, an icon generator ROM 28, an icon ROM 29, and a VRAM 30 are provided as constituent elements.

  The lens unit includes a lens 11 and a mechanical mechanism 12 including a lens driving unit, a diaphragm, a filter unit, and a zooming unit that drive the lens 11. A CCD (charge coupled device) 13 converts an image input via the lens unit into an electric signal (analog image data). The CDS (Correlated Double Sampling) circuit 14 is a circuit for reducing noise for the CCD type image pickup device. The A / D converter 15 converts analog image data input from the CCD 13 via the CDS circuit 14 into digital image data. That is, the output signal of the CCD 13 is converted into a digital signal by the A / D converter 15 at the optimum sampling frequency through the CDS circuit 14.

  The digital signal processing unit 16 divides the image data input from the A / D converter 15 into color difference data and luminance data, and performs various processing, correction, and data processing for image compression / decompression.

  The image compression / decompression circuit 17 includes, for example, orthogonal transformation / inverse orthogonal transformation, which is a process of JPEG-compliant image compression / decompression, and Huffman coding / Huffman decoding, which is a process of JPEG-compliant image compression / decompression. Etc.

  The DRAM 18 temporarily stores the compressed image data. The memory card 19 stores the compressed image data as an image data file.

  The LCD 27 directly displays the image data captured by the CCD 13 and displays an image corresponding to the image data recorded on the memory card 19. The LCD 27 displays the set digital still camera state, for example, the set mode display and error display, using an OSD (On Screen Display) function described in detail later.

  The CPU 23 controls the operation of each unit of the digital camera 10 according to a control program stored in the ROM 26 in accordance with an instruction from the operation unit 24 or an external operation instruction such as a remote controller (not shown). Specifically, the CPU 23 includes a driving operation of the lens 11 by the lens driving unit of the mechanical mechanism 12, a control of the image data recording operation, a control of the reproduction operation of the image data, an icon display of the OSD control unit 20, and scale information. A control command related to display of shooting information is issued.

The operation unit 24 includes operation buttons and the like for externally performing function selection, shooting instruction, and other various settings. The OSD control unit 20 generates icon data (in this case, the icon data includes counter, time, date character display data, symbol data such as shooting conditions, and shooting information including scale information), The data is output to the digital signal processing circuit 16 at a dot clock timing of a predetermined cycle.

  The digital camera 10 described above has a playback mode in which image data captured by the CCD 13 and temporarily stored in the memory card 19 is displayed on the LCD 27, and a through image mode in which the image data captured by the CCD 13 is directly displayed on the LCD 27. ing.

  Next, the image data recording operation of the digital camera will be described. First, the subject image via the lens 11 is converted into an electrical signal (analog image data) by the CCD 13 and then input to the A / D converter 15 via the CDS 14, and the analog image data is converted into digital image data. The The converted digital image data is signal-processed by the digital signal processing circuit 16 and stored in the DRAM 18 via the bus 25. The digital image data stored in the DRAM 18 is input to the compression / expansion circuit 17 through the bus 25, subjected to compression processing, and stored in the DRAM 18 again. When the compression process is completed, the CPU 23 records the compressed image data stored in the DRAM 18 as an image data file in a predetermined form on the memory card 19 via the bus 25.

  In the operation of the reproduction mode of the image data stored in the memory card 19, when the image data file of the memory card 19 to be reproduced is designated by the operation of the operation unit 24, the compressed image of the designated image data file is designated. Data is read and stored in the DRAM 18. The image data stored in the DRAM 18 is input to the compression / expansion circuit 17 via the bus 25, decompressed, and stored again in the DRAM 18. The decompressed image data stored in the DRAM 18 is input to the digital signal processing circuit 16 via the bus 25, converted into a video signal, and displayed on the LCD 27.

  In the operation in the through image mode in which captured image data is directly displayed, first, the subject image via the lens 11 is converted into an electrical signal (analog image data) by the CCD 13 and then passed through the CDS 14 and then the A / D converter. 15, the analog image data is converted into digital image data. The converted digital image data is subjected to signal processing by the digital signal processing circuit 16, temporarily stored in the DRAM 18, converted into a video signal, and displayed on the LCD 27.

  The OSD control unit 20 includes a command decoder that decodes a command input from the CPU 23. The OSD control unit 20 also stores an icon data generator ROM 28 for outputting icon data corresponding to a command sent from the CPU 23, an icon ROM (Read Only Memory) 29 for storing icon information, and icon data read from the icon ROM 29. A video (V) RAM 30 is provided. The OSD control unit 20 digitally outputs the dot clock to the output controller and the timing of the dot clock input from the oscillation circuit by synchronizing the icon data developed in the video RAM with the vertical synchronizing signal and the horizontal synchronizing signal. And an output controller for sending to the signal processing circuit 16.

  In the digital camera according to the first embodiment, a portion of the subject to be focused is marked in the captured image, and the actual distance information measured and the like is acquired and associated as shooting information and displayed as reference information. The The reference information displayed on the screen is simply called an icon in terms of form.

  In the OSD control unit 20 that has received the command data from the CPU 23, the icon data specified by the command decoded by the command decoder is read from the icon data generator ROM 28 and developed in the video RAM 30, and then the icon data is output by the output controller. In synchronization with the vertical synchronizing signal and the horizontal synchronizing signal, the signal is sent to the digital signal processing circuit 16 at the timing of the dot clock input from the oscillation circuit.

  The digital signal processing circuit 16 synthesizes the through image or the reproduction image to be reproduced and the icon data input from the OSD control unit 20, converts the signal so that it can be displayed on the LCD 27, and then on-screen the LCD 27. Display.

  The reference information display program read by the CPU 23 includes (1) a focal point acquisition function for acquiring position information focused on the subject on the photographed image, and (2) measuring the distance from the lens extension amount to the subject. Distance information acquisition function for acquiring information, (3) scale acquisition function for acquiring reference information indicating the size of the subject in accordance with the acquired distance information at the focal point, and (4) information about the acquired distance information and the focal point. And an association function for associating the captured image with each other and (5) a display function for displaying reference information indicating the size of the subject at the focal point associated with the captured image on the LCD 27 together with the image. In this way, in the first embodiment, a display function for displaying shooting data such as the size of a subject at the time of shooting with an icon is displayed by icon display using the OSD function.

  An operation for acquiring reference information indicating how much a subject is actually in a captured image will be described. Here, the digital camera 10 is configured to apply so-called hill-climbing AF, in which the focusing lens moves from the contrast of the image signal of the subject to be focused, and the distance from the moved feed amount to the actual subject is obtained. . By using this AF method, the distance to the actual subject is calculated based on the amount of extension of the lens when the subject to be photographed is focused. In this case, when the accuracy is limited, the distance measured is calculated and displayed with, for example, two significant digits.

  FIG. 2 is a diagram for explaining a calculation method of how much a reference length indicated in image information is a corresponding actual length. Now, the lens 11 is extended by the lens driving unit, the subject 201 to be photographed is in focus, and lens extension amount information is acquired. When the lens extension amount information is acquired, the distance c to the actual subject corresponding to the extension amount is calculated.

  On the other hand, the image of the subject 201 is projected as a subject image 203 onto the imaging plate of the CCD 13 via the lens 11. At this time, a scale (icon) 204 serving as a reference to be displayed on the image can be determined in advance by designating a predetermined pixel position. The length of the scale 204 on the image pickup plate of the CCD 13 is calculated as b from the number of pixels.

Here, when the focal length of the lens is a, when the actual length in the vicinity of the subject corresponding to the scale 204 on the imaging plate is x, the following relationship (Equation 1) is satisfied.
tan θ = b / a = x / c (Formula 1)
Therefore, the actual length x corresponding to the scale 204 is x = (bc) / a
Is calculated from The control program of the CPU 23 calculates x from the given numerical value and displays the numerical value of x.

  Here, in FIG. 2, the subject 201 and the scale 222 are displayed apart from each other, but the distance from the digital camera is the same. Similarly, the subject 203 and the scale 204 which are images on the imaging plate of the CCD 13 are displayed apart from each other, but the distance from the lens 11 is the same. Further, the distance of the subject 201 in the in-focus portion is calculated by measuring the distance at the focal point.

  The CPU 23 displays icon information indicating shooting data such as a reference icon that can be compared with the subject at the focal point and the distance to the subject in accordance with a reference information display program stored in the ROM 26 in accordance with an instruction from the operation unit 24. The generated icon information is transmitted to the digital signal processing circuit 16 as a video signal and displayed on the LCD 27 so as to be superimposed on the photographed image.

  FIG. 3A is a schematic diagram for explaining an example in which an in-focus mark and scale information are displayed on the LCD 27. On the screen 31, the focused point 31b is attached to the focused person 31a, the image of the unfocused person 31c is blurred, and the scale is 140 cm (31d) as scale information at this time. Is displayed. On the screen 32, a scale 32b as scale information is attached to the person 32a as a focus information instead of the focus mark for the focused person 32a, and the right corner of the screen is displayed. In addition, a numerical value 140 cm (32c) which is the length of the scale is displayed.

  As the scale information, the focus mark may be indicated in this way, and the actual size of the indicated focus mark may be displayed as a number. Further, the focus mark may be a design that is a schematic of a ruler, a circular annular design, or a rectangular design. In addition, it is possible to design cans, bottles, cigarette cases, etc. familiar to the operator. It is desirable that the icon be displayed in a scale that is suitable for display on the screen.

  FIG. 3B is a schematic diagram illustrating an example in which a focus mark, scale information, and distance measurement information are displayed on the LCD. The screen 33 is a display on the LCD 27 before photographing, and when the shutter button is half-pressed, the mechanical mechanism 12 causes a focusing operation to focus on the person 34a on the screen 34 and to focus on the person 34a that is in focus. A focus mark 34b is attached. On the screen 34, shooting data 34c is displayed on the right side of the screen as distance measurement data up to the focused person 34a. In the shooting data 34c, the distance measured by the distance measuring unit to the person 34a of the focused subject is 10.3 meters, and a scale indicating the actual measurement at the focal point and a numerical value 140 centimeter which is the length of the scale. It is displayed that there is.

  FIG. 4 is a flowchart for explaining a procedure for displaying reference information on the LCD of the digital camera according to the first embodiment. When the operator presses the shutter button of the digital camera halfway, the focusing unit of the mechanical mechanism 12 enters a focusing operation for focusing on the subject. The mechanical mechanism 12 determines whether or not the subject is in focus (step S101), and if not in focus, the mechanical mechanism 12 repeats the focusing operation (No in step S101). When the in-focus portion focuses on the subject (Yes in Step S101), the distance measuring unit of the mechanical mechanism 12 measures the distance to the in-focus point of the subject (Step S102), and when measured (Yes in Step S102), The mechanical mechanism 12 detects whether or not photographing has been completed (step S103).

  If shooting is not completed, steps S101 to S103 are repeated. When shooting is completed (Yes in step S103), the above-described actual scale information is calculated using the acquired distance information (step S104), the calculated scale information is associated with the captured image (step S105), and the association is performed. The obtained scale information is displayed as an icon on the LCD 27 so as to overlap the photographed image (step S106). Here, the scale information is displayed overlaid on the image after shooting is completed, but it may be configured to be displayed on the LCD 21 before shooting.

  Here, it is desirable that the icon to be displayed can be displayed as a translucent image. The inconvenience that the captured image is hidden by the area of the icon can be avoided.

  When a display method using a translucent image is used, it is also possible to adopt a method in which the user can select semi-transparent / non-transparent (for example, an operation at the time of display or a user-set item prepared in advance). Note that the method of superimposing the translucent image on the image on the base of the display screen can be implemented by applying known means.

  Further, the photographing operation of the camera can be performed independently of the icon display operation here. Although the idea to make the above icon a semi-transparent image is also shown, while the icon to be displayed can perform its function, it should be avoided to limit the shooting operation as much as possible, Even when the icon is displayed, the camera can be set in a state in which a shooting operation can be performed, that is, by pressing a release (shutter) button. By performing control according to these conditions, it is possible to perform proper photographing without missing a photo opportunity.

  In the above description, the icon information indicating the scale information is generated and the icon is displayed after shooting, but the icon information indicating the subject image and the scale information is displayed on the LCD 27 before shooting. You can also.

  Further, at the time of shooting, both the captured image information and icon information such as in-focus and distance information are stored in the memory card 19, and scale information and the like are displayed together with the image when the stored information is displayed on the display device. It can also be set as the structure to do.

  Here, when storing the captured image information and the in-focus and distance information or their icon information, they are stored in association with each other, and when the stored information is displayed on the display device, the scale information or the like is stored as an image. It can also be set as the structure which reads in association and displays.

  In this way, the digital camera according to Embodiment 1 acquires distance information to the subject focused by autofocusing or focusing operation of the optical system by manual operation, and the size of the subject at the focal point in the image. The reference size information indicating the reference size is acquired, and an icon indicating the reference size is juxtaposed and displayed together with the captured image, which makes it easy to easily understand the size of the subject on the image even after capturing.

(2. Embodiment 2)
The digital camera according to the second embodiment is different from the first embodiment in that it includes a zoom mechanism that makes the optical system focal length of the lens variable, acquires optical system focal length information in the zoom mechanism, and provides distance measurement information and optical information. According to the system focal length information, icon information for displaying the actual size and distance information at the focal point of the subject is generated and displayed on the LCD 27.

  In the digital camera according to the second embodiment, the lens 11 shown in FIG. 1 is a variable focus lens having a zooming function, and the mechanical mechanism 12 makes the optical focal length of the lens variable. The reference information display program read by the CPU 23 further executes (6) an optical system focal length information acquisition function for acquiring the optical system focal length information of the lens, and the subject according to the distance information and the optical system focal length information at the focal point. Reference information indicating the size of the subject, and associating the acquired distance information and information about the focal point with the captured image, and indicating the size of the subject at the focal point associated with the captured image Is displayed on the LCD 27 together with the image.

In the first embodiment, the formula for obtaining the actual length x corresponding to the scale 204 on the image shown in FIG. 2 differs from the first embodiment in that the optical focal length changes. That is, if the changing optical focal length is now B, the actual value x corresponding to the scale 204 in FIG.
tan θ = B / a = x / c (Formula 2)
Therefore, when the optical focal length B of the lens is detected from zooming of the zoom mechanism and the optical focal length division is obtained by the reference information display program, the actual length x corresponding to the scale 204 deforms (Equation 2). Thus, it can be calculated by calculating x = (Bc) / a.

  FIG. 5 is a schematic diagram for explaining an example in which an in-focus mark, scale information, optical focal length information, and distance measurement information are displayed on the LCD. The screen 35 is an example of a display on the LCD 27 after photographing. The mechanical mechanism 12 causes a focusing operation by pressing the shutter button halfway, and the person 35a on the screen 35 is focused and focused. The in-focus mark 35b is attached. Further, in the example displayed on the screen 35, as the shooting data up to the focused person 35a, the right side of the screen is 35 mm (35c) which is the optical focal length information of the lens, and the scale 35b at this time is large. 140 centimeters (35d), which is information indicating the height, is displayed. In addition, although the optical system focal length of a lens is displayed here as what was converted into the general silver salt 35mm film camera, the display method can be changed arbitrarily. For example, the optical system focal length of an actual digital camera lens can be displayed as it is.

  Further, on the screen 36, as the in-focus mark, an annular scale information 36b in the subject person 36a, an optical focal length information of the lens at this time, 35 mm (36c), and an annular image are shown on the image at this time. 140 cm (36d), which is the diameter value converted from the actual design as an actual measurement, is displayed as shooting data.

  FIG. 6 is a flowchart for explaining a procedure for displaying reference information on the LCD of the digital camera according to the second embodiment. FIG. 6 is a schematic diagram illustrating an example in which reference information is displayed when the subject is focused on the optical system during shooting. Steps up to step S202 are the same as steps up to step S102 in FIG. When the distance measuring unit measures the distance to the subject (Yes in Step S202), it is determined whether or not information on the optical focal length by the zooming function of the mechanical mechanism 12 has been acquired (Step S203). Detects whether it is completed (step S204).

  If shooting is not completed, steps S201 to S204 are repeated. When shooting is completed (Yes in step S204), scale information on the image is acquired based on the acquired distance information and optical focal length information (step S205), and the acquired scale information is associated with the shot image (step S206). The associated scale information is displayed as an icon on the LCD 27 so as to overlap the photographed image (step S207). In the display in this case, the acquired optical focal length information is also displayed.

  Thus, in the second embodiment, the icon data using the OSD function is used to display shooting data such as the size of the subject when the zoom lens is used, the in-focus mark, the optical focal length information, and the distance information to the subject. In addition to the captured scale information, the optical focal length information of the zoom lens can also be displayed by executing a display function that displays the icon as an icon, so whether the captured image was taken with a wide-angle lens is a telephoto lens You can know if it was taken with

(3. Embodiment 3)
The digital camera according to the third embodiment is different from the first embodiment in that an icon for accepting a selection input from the operator and displaying the size, distance information, etc. at the focal point of the subject is displayed on the LCD 27 from different designs. It is a point to be displayed.

  In the digital camera according to the third embodiment, the operation unit 24 illustrated in FIG. 1 includes a reception button that receives an icon design selection from the operator, and transmits a selection request signal by the received selection input.

  The reference information display program read by the CPU 23 selects and acquires the focal point mark, the distance information of the subject at the focal point, and the reference information indicating the size of the subject according to the selection request signal received by the CPU 23, and displays the icon. Is displayed on the LCD 27 together with the image.

  The operator presses an operation button (not shown) of the operation unit 24 between the icons 35b, c, and d on the screen 35 shown in FIG. 5 and the icons 36b, c, and d on the screen 36, for example. Can be selected.

  FIG. 7 is a diagram illustrating an example of reference icons displayed in an image. FIG. 8 is another diagram illustrating an example of reference icons displayed in an image. FIG. 9 is another diagram illustrating an example of reference icons displayed in an image.

  The medicine bottle 50a is now displayed on the screen 50 displayed on the LCD 27 of FIG. Here, in step S305 in FIG. 7, when the operator presses the selection button of the operation unit 24 and the design selection of the scale information is input, the reference size image setting screen 51 appears. Here, a can 51a, a cigarette 51b, and a human hand 51c are shown as reference size images, and now when the can is selected by pressing the OK button, the enlargement / reduction ratio is calculated and is suitable on the screen. The size is displayed as a can image 52a on the screen 52. When the display position is moved by an input from the operation unit 24 and the OK button is pressed, the position of the can 53a to be copied together with the image 53 is determined.

  Here, it is desirable to provide a button for determining whether or not to display the reference size image. By placing the cursor on the reference display determination screen 55 shown in FIG. 8 and pressing the determination button, the can 56a is displayed on the screen 56 next to the medicine bottle 50a that is the subject.

  Further, as shown in FIG. 9, the reference size image can be imprinted by displaying scales 57a and 57b representing the actual size on a part of the frame of the screen. Further, the scale shown by pressing the selection button can be changed to the can 58a again.

  FIG. 10 is a flowchart for explaining a procedure for displaying reference information on the LCD of the digital camera according to the third embodiment. Steps up to step S304 are the same as steps up to step S104 in FIG. Scale information is acquired on the image based on the acquired distance information (step S304), and the operator accepts an input for selecting a display design for the scale information (step S305). If accepted, scale information for displaying the received design is displayed. Select (step S306). Subsequent steps S307 and subsequent steps are the same as those after step S105, and thus description thereof is omitted.

  As described above, in the third embodiment, when photographing data such as scale information by icon display using the OSD function is displayed together with the focal point, the selection input of the operator is received and the design is changed and displayed. Can perform functions that can As a result, it is possible to display on the LCD 27 icons indicating the focal point and the shooting data with a design according to the preference of the operator.

(4. Embodiment 4)
The digital camera according to the fourth embodiment is different from the first embodiment in that an icon for displaying the size, distance information, and the like of the subject at the focal point is displayed on the background portion of the image away from the focal point on the LCD 27. is there.

  The reference information display program read by the CPU 23 of the digital camera according to the fourth embodiment executes a function of determining the background in the photographed image, and the distance information of the subject at the focal point and the subject for the focal point mark. A layout function is executed for arranging a position for displaying reference information indicating the size of the image in a background image other than the focal point. Then, an icon such as photographing data is displayed at a position on the image displayed on the LCD 27 arranged by the discrimination function and the layout function.

  Here, since the technique which an inventor etc. already invented can apply the technique which arrange | positions and displays an image, such as an icon, in background parts other than a focusing point, description is abbreviate | omitted here.

  FIG. 11 is a schematic diagram illustrating a display example of reference information according to the fourth embodiment. FIG. 12 is a schematic diagram illustrating another display example of the reference information according to the fourth embodiment. On the screen 38 where photographing has been completed with respect to the image 37 before photographing preparation, the photographing data 38c is displayed in a state of being arranged in a distant background portion with respect to the subject 38a and the focal point 38b. Similarly, on the screen 40 where photographing has been completed for the image 39 before photographing preparation, the photographing data 40c is displayed in a state of being arranged in a distant background portion with respect to the subject 40a and the focal point 40b.

  FIG. 13 is a flowchart for explaining a procedure for displaying reference information on the LCD of the digital camera according to the fourth embodiment. Steps up to step S405 are the same as steps up to step S105 in FIG. The read program associates the scale information with the captured image information (step S405), detects the background portion other than the focal point of the subject, arranges the scale information in the background portion (step S406), and displays the captured image on the LCD 27, The scale information arranged in the background portion is displayed (step S407).

  As described above, in the digital camera according to the fourth embodiment, the background is determined in the captured image, and the position of the icon such as the shooting data is arranged and displayed on the background position other than the in-focus mark on the image. Therefore, since icons such as shooting data can be displayed without hiding the focal point and important subject image information, the convenience is high.

  As described above, the image display device, the image display method, and the program for causing the computer to execute the method according to the present invention are useful for the image display technology, and in particular, digital cameras, PDAs (Personal Digital Assistants), and mobile phones. The present invention is useful for image display technology for displaying or displaying photographing information in a photographing apparatus having a small display such as a digital camera.

1 is a block diagram illustrating a basic configuration of a digital camera according to Embodiment 1. FIG. It is a figure explaining the calculation method how much the reference | standard length shown in image information is some corresponding actual length. It is a schematic diagram explaining the example in which the focus mark and scale information were displayed on LCD. It is a schematic diagram explaining the example in which the focus mark, scale information, and ranging information were displayed on LCD. 6 is a flowchart illustrating a procedure for displaying reference information on the LCD of the digital camera according to the first embodiment. FIG. 10 is a schematic diagram illustrating an example in which a focal point mark, scale information, optical focal length information, and distance measurement information are displayed on the LCD of the digital camera according to the second embodiment. 10 is a flowchart illustrating a procedure for displaying reference information on the LCD of the digital camera according to the second embodiment. FIG. 10 is a diagram for explaining an example of reference icons displayed in an image on an LCD of a digital camera according to a third embodiment. It is another figure explaining the example of the reference icon displayed in the image of LCD. It is another figure explaining the example of the reference icon displayed in the image of LCD. 10 is a flowchart for explaining a procedure for displaying reference information on an LCD of a digital camera according to a third embodiment. FIG. 10 is a schematic diagram illustrating an example of reference information on an LCD of a digital camera according to a fourth embodiment. FIG. 16 is a schematic diagram showing another example of reference information on the LCD of the digital camera according to the fourth embodiment. 15 is a flowchart for explaining a procedure for displaying reference information on the LCD of the digital camera according to the fourth embodiment.

Explanation of symbols

10 Digital Camera 11 Lens 12 Mechanical Mechanism 13 CCD
14 CDS
15 A / D (Analog / Digital) Converter 16 Digital Signal Processing Circuit 17 Compression / Expansion Circuit 18 DRAM
19 Memory Card 20 OSD Control Unit 21 Driver 22 SG (Sync Generator)
23 CPU
24 Operation unit 25 Bus 26 ROM
27 LCD
28 Icon Generator ROM
29 Icon ROM
30 VRAM

Claims (16)

An image display device that displays a captured image of a subject acquired by an imaging unit via an optical system,
In-focus acquisition means for acquiring position information of the in-focus in the captured image by the optical system;
Distance acquisition means for acquiring distance information between the subject corresponding to the position information acquired by the in-focus acquisition means and the imaging means;
Focus acquisition means for acquiring optical focal length information which is a focal length of the optical system;
Scale acquisition means for acquiring scale information indicating the size of the subject at the in-focus point based on the distance information acquired by the distance acquisition means and the optical focal length information acquired by the focus acquisition means ;
The position information of the focus, and the optical focal length information, and associating means and said scale information, associated with the captured image,
The position information of the focus associated with the captured image by the association means, the optical focal length information, the based on the scale information, the position of the focal point in the captured image, the position is in focus and it displays the scale information serves as a focal point mark indicating that the display means for displaying the optical focal length information with the captured image,
An image display device comprising: The associating means further associates the distance information with the captured image,
The image display apparatus according to claim 1, wherein the display unit further displays the distance information together with the captured image. The display means before Symbol distance information displayed in the optical point focal length information, and accepting at least selection input selecting one of the displayed shape of the scale information in accordance with the received selection input, display of the at least one A selection means for selecting a shape;
The image display apparatus according to claim 1, wherein the display unit displays according to a display shape selected by the selection unit. When displaying at least one of the optical focal length information and the distance information, the arrangement means for arranging a position away from the focal point in the captured image, further comprising,
The display means, and wherein on the basis of the position location by positioning means, at least one of the distance information and the optical focal length information, and displays a position away from the focus point The image display device according to any one of claims 1 to 3. In the captured image, determining means for focusing the subject and the background image of the subject, further comprising,
The display means, the position of the background image determined by said determining means, any of claims 1 to 4, characterized in that for displaying at least one of the distance information and the optical focal length information The image display apparatus as described in any one. The display means, the image display apparatus according to any one of claims 1 to 5, wherein the distance information and the is for displaying an enlarged or reduced at least one of the optical focal length information . The display means, based on said at least one of information with the information of the determined background image placement means and information of the deployed position by the determination means determines at least the distance information and of the optical focal length information 6. The image display device according to claim 4, wherein any one of them is enlarged or reduced for display. The scale information includes image information and text information,
The image display device according to claim 1, wherein the display unit displays at least the image information of the scale information at a focal point position in the captured image. 9. The storage device according to claim 1, further comprising storage means for combining and storing the captured image , the focal position information , the optical focal length information, and the scale information in one file. The image display apparatus as described in any one. 10. The storage unit according to claim 9, wherein the storage unit stores the captured image , position information of the focal point, the optical focal length information, and the scale information as an associated file. Image display device. An image display method for displaying a captured image of a subject acquired by an imaging unit via an optical system on a display unit,
A focal point acquisition step of acquiring position information of a focal point in the captured image by the optical system;
A distance acquisition step of acquiring distance information between the subject corresponding to the position information acquired by the in-focus acquisition step and the imaging means;
A focus acquisition step of acquiring optical focal length information which is a focal length of the optical system;
A scale acquisition step of acquiring scale information indicating the size of the subject at the focal point based on the distance information acquired by the distance acquisition step and the optical focal length information acquired by the focus acquisition step ;
The position information of the focus, and the optical focal length information, and associating step and said scale information, associated with the captured image,
The position information of the focus associated with the captured image by the association step, and the optical focal length information, the based on the scale information, the position of the focal point in the captured image, the position is in focus a display step of displaying on said display means together with, the optical focal length information with the captured image serves as a focus mark displaying said scale information indicating that,
An image display method comprising: The association step further relates the distance information to the captured image,
The image display method according to claim 11, wherein the display step further displays the distance information together with the captured image on the display unit . The display means before Symbol distance information displayed in the optical point focal length information, and accepting at least selection input selecting one of the displayed shape of the scale information in accordance with the received selection input, display of the at least one a selection step of selecting the shape, wherein further,
The image display method according to claim 11 or 12, wherein the display step displays the image on the display unit according to the display shape selected in the selection step. At least one of the distance information and the optical focal length information, when displaying on the display means, the arrangement step of arranging a position away from the focal point in the captured image, wherein further,
Wherein the display step, based on the position positioned by the positioning step, at least one of the distance information and the optical focal length information, and displays a position away from the focal point in the display unit The image display method according to claim 11, wherein: In the captured image, a determination step of determining the in-focus the object and the background image of the object, wherein further,
Wherein the display step, the position of the background image determined by the determining step, the claims on the display means, characterized in that for displaying at least one of the distance information and the optical focal length information The image display method according to any one of 11 to 14.   A program for causing a computer to execute the image display method according to any one of claims 11 to 15.

Images