JP2009005303A - Image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a user to have difficulties in understanding a reading region of an image of which predetermined information is encoded. <P>SOLUTION: A scanner 40b includes a CCD image sensor 108 for scanning an original on a platen glass 102 and reading a visible image thereon, and an infrared light receiving portion 112 for reading an invisible image of the original on the platen glass 102 fixed thereto. A black cover 109 for transmitting infrared light is mounted between the platen glass 102 and infrared light receiving portion 112 so that the mounting position of the infrared light receiving portion 112 is not viewed from the side of the platen glass 102. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image reading apparatus that reads an image of a document.

  2. Description of the Related Art Image reading devices that automatically read image information of a document are used as reading devices such as copying machines and facsimile machines, and scanners for computer input. In this type of image reading apparatus, an image of an original is read by irradiating the original with light using a light source and receiving reflected light reflected from the original with an image sensor.

  Recently, in order to distinguish special manuscripts such as banknotes and securities from general manuscripts in response to the heightened security awareness and the trend of digitization, image shapes that absorb or reflect infrared rays on special manuscripts, for example. A technique for forming an invisible image that is difficult to see visually by using a material (ink, toner, etc.) has begun to be adopted. In addition to the special manuscript, a technique for forming an invisible image in which information such as ID is embedded in the manuscript on which confidential information or the like is formed as a visible image by using the image forming material is also considered. ing.

  For this reason, image reading apparatuses are also required to read infrared images (code images) obtained by encoding predetermined information in addition to reading visible images (document images). In response to such a request, the infrared filter is configured so that infrared, red, green, and blue color filters can be selectively inserted into the optical path of the reflected light from the document placed on the document table. A technique of sequentially executing red image reading, green image reading, and blue image reading has been proposed (see, for example, Patent Document 1).

JP-A-6-284283

By the way, when the user knows that the code image is being read by the image reading device, hiding the code image reading area on the document with, for example, a blank sheet, obstructs the reading of the code image. Can be considered. Then, even if a code image including information prohibiting duplication is formed on the original, duplication can actually be performed.
It is an object of the present invention to make it difficult for a user to understand the presence of a portion where an infrared image or code image is read when viewed from a document table.

According to a first aspect of the present invention, there is provided a document table on which a document is placed, a visible light receiving unit that receives visible light reflected from the document via the document table, and an infrared that is reflected from the document through the document table. Image reading including an infrared light receiving unit that receives light, and an infrared transmitting member that is disposed between the document table and the infrared light receiving unit and covers the infrared light receiving unit and transmits the infrared light Device.
A second aspect of the present invention is the image reading apparatus according to the first aspect, wherein the infrared transmitting member has a lower light transmittance for the visible light than a light transmittance for the infrared light.
A third aspect of the present invention is the image reading apparatus according to the first aspect, wherein the infrared transmitting member is black.
The invention according to claim 4 further includes a visible light source that irradiates the original with visible light through the document table, and an infrared light source that irradiates the document with infrared light through the document table, The image reading apparatus according to claim 1, wherein an infrared light source is disposed closer to the infrared light receiving unit than the infrared transmitting member.

According to a fifth aspect of the present invention, there is provided a document table on which a document is placed, a document image reading unit that reads a document image from the document placed on the document table, and a partial area of the document placed on the document table. An image including a code image reading unit that reads a code image, and a shielding member that is disposed between the document table and the code image reading unit and shields the code image reading unit from the document table side to the user. It is a reading device.
According to a sixth aspect of the present invention, the document image reading unit reads the document image based on a light reception result of light in a visible region reflected from the document, and the code image reading unit reflects from the document. The code image is read based on a light reception result of light in an infrared region, and the shielding member has higher light transmittance for light in the infrared region than light transmittance for light in the visible region. An image reading apparatus according to claim 5.
A seventh aspect of the present invention is the image reading apparatus according to the fifth aspect, further comprising a switching unit that moves and switches the partial area read by the code image reading unit.

According to the first aspect of the present invention, it is possible to make it difficult for the user to understand the presence of the portion where the infrared image is read when viewed from the document table, that is, the infrared light receiving unit.
According to the invention described in claim 2, it is possible to make it difficult to visually confirm the presence of the infrared light receiving part.
According to the third aspect of the present invention, the infrared light receiving unit can be hidden when viewed from the document table side.
According to the invention of claim 4, it is possible to make it difficult to confirm the infrared light source from the document table side.
According to the fifth aspect of the present invention, it is possible to make it difficult for the user to know the presence of the portion where the code image is read, that is, the code image reading unit, when viewed from the document table.
According to the sixth aspect of the present invention, it is possible to make it difficult to visually confirm the presence of the code image reading unit.
According to the seventh aspect of the present invention, it is possible to select the read target area of the code image on the document from a wide range.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 shows an example of the configuration of a system to which the present embodiment is applied. This system includes a terminal device 10, an identification information management server 20, a document management server 30, an image forming device 40, and a network 70. Among these, the terminal device 10 instructs printing of an electronic document. The identification information management server 20 functioning as a determination device manages identification information given to a sheet (medium) when printing an electronic document, and an image obtained by superimposing a code image including the identification information on the image of the electronic document. Generate. The document management server 30 manages electronic documents. The image forming apparatus 40 includes a printer device 40a as a printing device and a scanner device 40b as a reading device. The printer device 40a prints an image in which a code image is superimposed on an image of an electronic document, and the scanner device 40b. To read the image on the medium. The network 70 connects the terminal device 10, the identification information management server 20, the document management server 30, and the image forming device 40 (printer device 40a and scanner device 40b) through a communication line.

The identification information management server 20 is connected to an identification information repository 25 that stores identification information, and the document management server 30 is connected to a document repository 35 that stores electronic documents.
Further, the system scans and inputs the printed matter 50 output from the printer device 40a of the image forming apparatus 40 to the scanner device 40b of the image forming apparatus 40 according to an instruction from the terminal device 10, and the printer device 40a. And a copy 60 obtained by outputting the data.

The outline of the operation of this system will be described below.
First, the terminal device 10 instructs the identification information management server 20 to superimpose and print the code image on the image of the electronic document managed in the document repository 35 (1). At this time, printing attributes such as paper size, orientation, reduction / enlargement, and duplex printing are also input from the terminal device 10.
As a result, the identification information management server 20 acquires the electronic document that has received the print instruction from the document management server 30 (document repository 35) (2). Then, the identification information management server 20 gives a code image including identification information managed in the identification information repository 25 and position information determined according to the print attribute to the acquired electronic document image. Then, the image forming apparatus 40 is instructed to print (3).

Here, information that uniquely identifies each medium is employed as the identification information. For example, it may be information obtained by combining the identification number of the image forming apparatus 40 and the serial number of printing of the medium in the image forming apparatus 40 or the date and time of printing. It may be managed information. Alternatively, information that uniquely identifies an electronic document printed on a medium may be adopted as identification information instead of information that uniquely identifies each medium.
The position information is information for specifying a coordinate position (X coordinate, Y coordinate) on each medium. For example, it is conceivable to express coordinates in a coordinate system set by taking the upper left point of the medium as the origin, taking the X axis in the right direction of the medium and the Y axis in the lower direction.

  Thereafter, the printer device 40a of the image forming apparatus 40 outputs the printed matter 50 in accordance with the instruction from the identification information management server 20 (4). In the printer device 40a of the image forming apparatus 40, a code image as an example of the code image given by the identification information management server 20 and a document image corresponding to the electronic document are formed on a medium.

  Here, the printer device 40a forms the code image as an invisible image using an invisible toner whose infrared light absorption rate is equal to or higher than a certain reference. In addition, the code image in this Embodiment should just contain at least identification information, and does not need to contain positional information. In addition, the printer device 40a forms a document image based on an electronic document as a visible image using visible toner whose infrared light absorption rate is equal to or less than a certain reference. Note that the difference in the absorption rate of infrared light between the toner used for forming the code image and the toner used for forming the document image is that the code image is read by irradiating the infrared light with the scanner device 40b or the like. This is to ensure reading accuracy.

On the other hand, it is assumed that the printed material 50 is scanned and input to the scanner device 40b of the image forming apparatus 40 in order to obtain a copy 60 of the printed material 50 output in this way (5). At this time, the scanner device 40b reads a code image (invisible image) and a document image (visible image) formed on the printed matter 50 as a document. Then, the scanner device 40b analyzes the code image based on the read invisible image, and outputs the obtained identification information to the identification information management server 20 (6).
The identification information management server 20 determines whether or not copying is permitted for the electronic document to which the input identification information is assigned, that is, whether or not it has a copy right. When the identification information management server 20 determines that copying of the electronic document is permitted, the identification information management server 20 displays the identification information managed in the identification information repository 25 and the position information determined according to the print attribute. A code image is generated, and the image forming apparatus 40 is instructed to print the code image (7).
Thereafter, the printer device 40a of the image forming apparatus 40 superimposes the received code image and the visible image (document image) read by the scanner device 40b in accordance with an instruction from the identification information management server 20, and has the same contents as the printed matter 50. The copy 60 having the visible image is output (copy output) (8).
If the identification information management server 20 determines that copying is not permitted for the electronic document, it does not issue a print instruction. For this reason, the copy 60 is not output in the printer device 40a of the image forming apparatus 40.

  However, such a configuration is merely an example. For example, the function of the identification information management server 20 and the function of the document management server 30 may be provided in one server, or the function of the identification information management server 20 may be an image. The image processing unit of the forming apparatus 40 may be realized. In other words, the presence or absence of the copy right may be determined in the printer device 40a or the scanner device 40b of the image forming apparatus 40. In the present embodiment, the “electronic document” includes, for example, only text data, as well as text data including image data such as photographs, or only image data. The thing comprised by is also included.

  Further, here, an example is described in which a code image is analyzed using an invisible image read by the scanner device 40b, and based on the obtained identification information, it is determined whether or not there is a copy right for the printed matter 50 having this identification information. This is just an example. For example, an electronic document that is the basis of the printed matter 50 or another electronic document may be taken out from the document management server 30 based on the obtained identification information. Further, as the identification information, for example, characteristics such as the original size of the printed matter 50 and the print information may be embedded.

  2A to 2C are diagrams for explaining a two-dimensional code image generated by the identification information management server 20 and printed by the printer device 40a of the image forming apparatus 40. FIG. FIG. 2A is a diagram expressed in a lattice shape to schematically show units of a two-dimensional code image formed and arranged by an invisible image. FIG. 2B shows a unit of the two-dimensional code image. Further, FIG. 2C is a diagram for explaining a diagonal pattern of backslash “\” and slash “/”.

  These two-dimensional code images shown in FIGS. 2A to 2C are formed as invisible images in which machine reading by infrared irradiation and decoding processing operate stably over a long period of time and information is recorded at high density. Is done. Moreover, it is preferable that it is an invisible image with little noise given to the visible image of the medium surface which outputs an image. In the present embodiment, an invisible image is formed on the entire surface of the medium (paper surface) in accordance with the size of the medium to be printed. However, “entire surface” does not mean to include all four corners of the paper. In an electrophotographic apparatus such as the printer device 40a, the end of the paper surface is usually a part that cannot be printed, so even if there is no invisible image printed on the part, it is formed on the “entire surface”. Suppose that

  The two-dimensional code pattern shown in FIG. 2B includes an area in which a position code indicating a coordinate position on a medium is stored and an area in which an identification code for uniquely specifying an electronic document or a print medium is stored. Contains. It also includes an area for storing the synchronization code. As shown in FIG. 2A, a plurality of two-dimensional code patterns are arranged, and two-dimensional information in which different position information is stored on the entire surface of the medium (paper surface) according to the size of the medium to be printed. Cords are arranged in a grid. That is, a plurality of two-dimensional code patterns as shown in FIG. 2B are arranged on one surface of the medium, each of which includes a position code, an identification code, and a synchronization code. In the plurality of position code areas, different position information is stored depending on the place where each area is arranged. On the other hand, the same identification information is stored in the areas of the plurality of identification codes regardless of the place where they are arranged.

  In FIG. 2B, the position code is arranged in a 6 bit × 6 bit rectangular area. Each bit value is formed by a plurality of minute line bitmaps having different rotation angles, and represents the bit value 0 and the bit value 1 in the hatched pattern (pattern 0 and pattern 1) shown in FIG. . More specifically, the bit value 0 and the bit value 1 are expressed using backslash “\” and slash “/” having different slopes. The diagonal line pattern is composed of 8 pixels × 8 pixels at 600 dpi (dot per inch). The diagonal line pattern (pattern 0) that rises to the left has a bit value of 0, and the diagonal line pattern (pattern 1) that rises to the right has bits. The value 1 is expressed. Therefore, one bit (0 or 1) is expressed by one oblique line pattern. By using such a minute line bitmap having two kinds of inclinations, the noise given to the visible image is extremely small, and a two-dimensional code pattern in which a large amount of information is digitized and embedded is provided. .

That is, a total of 36-bit position information is stored in the position code area shown in FIG. In the present embodiment, of these 36 bits, 18 bits are used for encoding the X coordinate, and the other 18 bits are used for encoding the Y coordinate. If all 18 bits are used for position encoding, 2 ¹⁸ (about 260,000) positions are encoded. In this embodiment, each hatched pattern is composed of 8 pixels × 8 pixels (600 dpi) as shown in FIG. Since one dot of 600 dpi is 0.0423 mm, the size of the two-dimensional code (including the synchronization code) shown in FIG. 2B is about 3 mm in both vertical and horizontal directions (8 pixels × 9 bits × 0.0423 mm). Become. When 260,000 positions are encoded at intervals of 3 mm, a length of about 786 m is encoded. In this way, all 18 bits may be used for position encoding, or redundant bits for error detection and error correction may be included when a detection error of a hatched pattern occurs.

The identification code is arranged in a rectangular area of 2 bits × 8 bits and 6 bits × 2 bits, and stores identification information of a total of 28 bits. When using the 28-bit all as the identification information, it will represent the identity of two ways ²⁸ (about 270 million). Similarly to the position code, the identification code may include redundant bits for error detection and error correction in 28 bits.

In the example shown in FIG. 2 (c), the two hatched patterns differ in angle from each other by 90 °. For example, if the angle difference is 45 °, four types of hatched patterns are formed. In the case of such a configuration, 2-bit information (0 to 3) is expressed by one oblique line pattern. That is, the number of bits to be expressed is increased by increasing the angle type of the hatched pattern.
In the example shown in FIG. 2C, encoding of bit values is described using a hatched pattern, but the pattern to be used is not limited to the hatched pattern, and information such as a dot pattern such as a QR code is used. Any pattern can be used as long as the pattern can be embedded.

<Embodiment 1>
FIG. 3 is a diagram illustrating a schematic configuration of a scanner device 40b as an example of the reading device according to the first embodiment. 3A shows a side sectional view of the scanner device 40b, and FIG. 3B shows a top view of the scanner device 40b.
The scanner device 40 b includes a reading unit 100 that reads an image of a fixed original (for example, printed matter 50), and a platen cover 120 that is used to fix the original to the reading unit 100.

The reading unit 100 includes an apparatus frame 101 that forms a casing, and a platen glass 102 as an example of a document table on which a document to be scanned is placed in a stationary state. The reading unit 100 scans almost the entire platen glass 102 and moves at a half speed of the full rate carriage 103 that reads an image and supplies the light obtained from the full rate carriage 103 to the imaging unit. A half-rate carriage 104 is provided. The full rate carriage 103 includes an illumination lamp 105 as an example of a visible light source that irradiates white light on the document, a reflector 105A that reflects the light emitted from the illumination lamp 105 toward the platen glass 102, and a reflection obtained from the document. A first mirror 106A for receiving light is provided. Further, the half-rate carriage 104 is provided with a second mirror 106B and a third mirror 106C that provide the light obtained from the first mirror 106A to the imaging unit. Further, the reading unit 100 includes an imaging lens 107 and a CCD image sensor 108. Among these, the imaging lens 107 optically reduces the optical image obtained from the third mirror 106C. A CCD image sensor 108 as an example of a visible light receiving unit photoelectrically converts an optical image formed by the imaging lens 107. In this embodiment, the CCD image sensor 108 includes three one-dimensional line sensors, that is, one-dimensional imaging elements, so that red (R), green (G), and blue (B) visible images, that is, full-color images can be read. Configured. In this embodiment, reading is performed by scanning an image of a document placed on the platen glass 102 with the full rate carriage 103 and the half rate carriage 104. At this time, a visible image on almost the entire surface excluding the edge of the original is read. Here, in the present embodiment, almost the entire surface except the edge of the document is referred to as “all areas”. In the present embodiment, the document image reading unit is configured by the first mirror 106A, the second mirror 106B, the third mirror 106C, the imaging lens 107, and the CCD image sensor 108.
Note that the scanner device 40b according to the present embodiment employs a so-called corner registration method in which one corner of the platen glass 102 is set to the registration reference position 102a. Therefore, when reading a document, the document is placed on the platen glass 102 so that one corner of the document matches the registration reference position 102a.

  The reading unit 100 further includes an infrared image reading unit 110 used for reading an infrared image of a document placed on the platen glass 102. An infrared image reading unit 110 as an example of a code image reading unit includes four infrared LEDs 111a to 111d as an example of an infrared light source that irradiates an original with infrared light, and reflected light (infrared light) obtained from the original. ) Is received. In the following description, each infrared LED is referred to as a first infrared LED 111a, a second infrared LED 111b, a third infrared LED 111c, and a fourth infrared LED 111d. Here, the infrared light receiving unit 112 is attached to the lower side of the center of the platen glass 102. The first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, and the fourth infrared LED 111d are attached around the infrared light receiving unit 112. The first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, the fourth infrared LED 111d, and the infrared light receiving unit 112 are attached to the inner bottom surface of the device frame 101. The first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, the fourth infrared LED 111d, and the infrared light receiving unit 112 do not overlap with the movement trajectory of the full rate carriage 103 or the half rate carriage 104. , Its height is set. The first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, and the fourth infrared LED 111d emit light at a wavelength corresponding to the infrared absorption wavelength of the invisible image formed on the printed matter 50 as the document. . The first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, the fourth infrared LED 111d, and the infrared light receiving unit 112 face the upper side of the reading unit 100, that is, the platen glass 102 side. Is arranged in.

  In this embodiment, a cover 109 is attached to the inside of the apparatus frame 101. The cover 109 as an example of an infrared transmitting member or a shielding member is on the lower side of the platen glass 102, more specifically, below the full rate carriage 103 or the half rate carriage 104, and includes the first infrared LED 111a, It is disposed above the second infrared LED 111b, the third infrared LED 111c, the fourth infrared LED 111d, and the infrared light receiving unit 112. The cover 109 is provided so as to cover almost the entire bottom surface of the apparatus frame 101, and its end is fixed to the apparatus frame 101. Further, the cover 109 is bent in a Z-shape, and an opening for allowing visible reflected light from the third mirror 106c toward the imaging lens 107 to pass is formed in a part of the cover 109.

  Further, the reading unit 100 further includes a control / image processing unit 130. The control / image processing unit 130 is input from an infrared area sensor 114 (see FIG. 5 described later) as an example of a two-dimensional imaging unit in the present embodiment provided in the CCD image sensor 108 or the infrared light receiving unit 112. Predetermined processing is performed on the image data. The control / image processing unit 130 controls the operation of each unit of the reading unit 100.

  On the other hand, the platen cover 120 that can be opened and closed with respect to the reading unit 100 is opened and closed by moving the front side in the figure up and down with the back side in the figure as an axis. Further, when the platen cover 120 is closed with the document placed on the platen glass 102, the platen cover 120 presses the document against the platen glass 102 to bring it into close contact therewith. An opening / closing sensor 121 that detects an opening / closing operation of the platen cover 120 with respect to the reading unit 100 is attached between the reading unit 100 and the platen cover 120. In FIG. 3B, the description of the platen cover 120 and the open / close sensor 121 is omitted.

  FIG. 4 is a diagram illustrating the light transmission characteristics of the cover 109 described above. In FIG. 4, the horizontal axis represents the wavelength λ (nm) and the vertical axis represents the light transmittance T (%). In the present embodiment, the cover 109 is made of, for example, a transparent resin base material such as methacrylic acid resin or epoxy resin containing an absorbent having light absorption characteristics in the visible region. Therefore, the cover 109 has a characteristic of absorbing light having a wavelength in the visible region such as 350 to 700 nm and transmitting light having a wavelength in the near infrared region of 800 nm to 1200 nm.

  In the present embodiment, as shown in FIG. 3, when the user looks at the inside of the apparatus frame 101 from the platen glass 102 side, the first infrared LED 111 a and the second infrared image reading unit 110 are configured. The infrared LED 111 b, the third infrared LED 111 c, the fourth infrared LED 111 d, and the infrared light receiving unit 112 are present on the back side of the cover 109. As described above, the cover 109 has a characteristic of absorbing light having a wavelength in the visible region. For this reason, when the user views the reading unit 100 through the platen glass 102, the cover 109 looks black. As a result, the first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, the fourth infrared LED 111d, and the infrared light receiving unit 112 that are present on the back side of the cover 109 are hidden by the cover 109 and shielded. That is, it will be hidden.

FIG. 5 is a diagram showing a detailed configuration of the infrared light receiving unit 112 in the first embodiment. The infrared light receiving unit 112 includes a housing 113, an infrared area sensor 114, a lens unit 115 including four imaging lenses, and a shutter unit 116.
The casing 113 has a rectangular parallelepiped shape, and an infrared area sensor 114 is fixed to the inner bottom portion thereof. A lens unit 115 is fixed to the upper portion of the infrared area sensor 114 in the housing 113. Further, a shutter unit 116 as an example of a switching unit is attached to the upper portion of the lens unit 115 in the housing 113 in a rotatable state.
The infrared area sensor 114 is composed of a two-dimensional CMOS (Complementary Metal Oxide Semiconductor) image sensor, that is, a two-dimensional image sensor. Therefore, unlike the line sensor used in the CCD image sensor 108, an infrared image of a predetermined two-dimensional region in the main scanning direction and the sub-scanning direction is read by one reading. In this embodiment, a CMOS image sensor having 4 million read pixels is used. Further, the reading resolution of the CMOS image sensor is appropriately set according to the forming resolution of the code image formed on the original, that is, the printed matter 50 (in the present embodiment, the width of the oblique pattern). In this embodiment, the code image is formed at a resolution of 600 dpi (dot per inch) 2 pixels, that is, 300 dpi, and therefore, the reading resolution of the CMOS image sensor is read at 400 dpi or higher. Therefore, the infrared area sensor 114 in the present embodiment reads an area of about 16129 mm ² , that is, a postcard size (about 100 mm × about 150 mm = 15000 mm ² ) from the following formula.
4000000 / (400 × 400) × (25.4 × 25.4) = 16129 mm ²
The infrared area sensor 114 is not limited to a CMOS image sensor. For example, an alternative device such as a CCD area image sensor may be used.
The lens unit 115 includes four lenses 115a to 115d having a function of transmitting and collecting infrared light. In the following description, each lens is referred to as a first lens 115a, a second lens 115b, a third lens 115c, and a fourth lens 115d.
The shutter part 116 has a disk shape and includes an opening part 116a for exposing any one of the first lens 115a to the fourth lens 115d constituting the lens part 115, and is illustrated by a motor (not shown). Rotate in the direction of the middle arrow.

  Thus, in the infrared light receiving unit 112 according to the present embodiment, the first lens 115a, the second lens 115b, the third lens 115c, and the first lens 115a are rotated by stopping the shutter unit 116 at a predetermined position. Any of the four lenses 115d is exposed. Thereby, the infrared area sensor 114 receives infrared light transmitted through the exposed lens. At this time, a region (referred to as an infrared imaging region in the following description) that is a source of reflected light received by the infrared area sensor 114 differs depending on which lens is exposed. In this embodiment, the cover 109 is provided between the platen glass 102 and the infrared image reading unit 110 (see FIG. 3). However, as described above, the cover 109 transmits near infrared light. Since it has the characteristic, it does not become an optical obstacle in the infrared image reading.

FIG. 6 is a diagram for explaining an infrared imaging region read by the infrared area sensor 114. In FIG. 6, the shutter 116 is not shown.
For example, the first lens 115a reflects infrared light reflected by the registration reference position 102a, that is, the first reading region R1 close to the corner side in the first area S1 of the platen glass 102 on the registration reference position 102a side. To form an image. Here, the 1st infrared LED 111a is arrange | positioned in the approximate center part of 1st area | region S1. For this reason, the infrared area sensor 114 receives infrared light mainly emitted from the first infrared LED 111a and reflected by the first reading region R1. In addition, for example, the second lens 115b transmits, to the infrared area sensor 114, infrared light reflected by the second reading region R2 close to the corner side in the second region S2 adjacent to the lower side of the first region S1 in the drawing. Make an image. Here, the 2nd infrared LED 111b is arrange | positioned in the approximate center part of 2nd area | region S2. For this reason, the infrared area sensor 114 mainly receives the infrared light emitted from the second infrared LED 111b and reflected by the second reading region R2. Further, for example, the third lens 115c couples the infrared light reflected by the third reading region R3 close to the corner side to the infrared area sensor 114 in the third region S3 adjacent to the right side of the first region S1 in the drawing. Let me image. Here, the third infrared LED 111c is disposed at substantially the center of the third region S3. For this reason, the infrared area sensor 114 receives infrared light mainly emitted from the third infrared LED 111c and reflected by the third reading region R3. Furthermore, for example, the fourth lens 115d is adjacent to the right side of the second region S2 in the drawing and is adjacent to the lower side of the third region S3 in the drawing, and the fourth reading region R4 close to the corner side. The infrared light reflected by the light is imaged on the infrared area sensor 114. Here, the fourth infrared LED 111d is disposed at substantially the center of the fourth region S4. For this reason, the infrared area sensor 114 mainly receives infrared light emitted from the fourth infrared LED 111d and reflected by the fourth reading region R4.

FIG. 7A is a diagram for explaining the reception of infrared light when the first region S1 is an infrared imaging region. At this time, the opening 116a of the shutter 116 is stopped on the first lens 115a. In this case, of the infrared light reflected from the platen glass 102 side, only the reflected light from the first reading region R1 in the first region S1 passes through the opening 116a of the shutter unit 116. The infrared reflected light from the first reading region R1 that has passed through the opening 116a is imaged on the infrared area sensor 114 by the first lens 115a.
On the other hand, FIG. 7B is a diagram for explaining the reception of infrared light when the second region S2 is an infrared imaging region. At this time, the opening 116a of the shutter 116 is stopped on the second lens 115b. In this case, only the reflected light from the second reading region R2 in the second region S2 among the infrared light reflected from the platen glass 102 side passes through the opening 116a of the shutter unit 116. The infrared reflected light from the second reading region R2 that has passed through the opening 116a is imaged on the infrared area sensor 114 by the second lens 115b.

  FIG. 8 is a functional block diagram of the control / image processing unit 130. The control / image processing unit 130 operates the signal processing unit 131 that processes the visible image data input from the CCD image sensor 108 and the infrared image data input from the infrared area sensor 114, and the operation of the reading unit 100. And a control unit 132 for controlling.

  The signal processing unit 131 performs image processing on the visible image processing unit 150 that performs image processing on the visible image data obtained by the CCD image sensor 108 and the infrared image data obtained by the infrared area sensor 114. And an infrared image processing unit 160 to be applied. The output of the visible image processing unit 150 is sent to, for example, the printer device 40a (see FIG. 1), and the output of the infrared image processing unit 160 is sent to, for example, the identification information management server 20 (see FIG. 1).

  On the other hand, the control unit 132 includes a reading controller 141, a sensor controller 142, an illumination controller 143, and a scan controller 144. Among these, the reading controller 141 controls the entire reading unit 100. The sensor controller 142 controls the image data capturing operation by the CCD image sensor 108 and the infrared area sensor 114. The illumination controller 143 controls lighting / extinguishing of the illumination lamp 105 made of a white light source and the infrared LEDs 111a to 111d in accordance with a predetermined timing. The scan controller 144 turns on / off the motor in the reading unit 100 and controls the scanning operation by the full rate carriage 103 and the half rate carriage 104 and the rotation / stop operation of the shutter unit 116 provided in the infrared light receiving unit 112. To do. From these various controllers, control signals are output to the reading unit 100, and these operation controls are executed based on the control signals. The reading controller 141 is based on a control signal from the host system, a sensor output detected by the opening / closing sensor 121 when the platen cover 120 is opened / closed, a selection from a user via a UI (User Interface), and the like. Is controlling.

FIG. 9A shows a functional block diagram of the visible image processing unit 150. The visible image processing unit 150 includes an analog processing unit 151, an A / D conversion unit 152, a visible shading correction unit 153, and an image processing unit 154.
The analog processing unit 151 performs analog correction such as gain / offset adjustment on the visible image data from the CCD image sensor 108.
The A / D conversion unit 152 converts visible image data subjected to analog correction into digital data.
The visible shading correction unit 153 performs visible shading correction on the input visible image data. In the visible shading correction, input visual image data is corrected according to variations in sensitivity of each element in the corresponding three line sensors and the light quantity distribution characteristics of the illumination lamp 105.
The image processing unit 154 performs various types of image processing on the input visible image data that has been subjected to shading correction, and outputs it as document image data. Examples of processing performed by the image processing unit 154 include γ / gray balance correction, color space conversion, enlargement / reduction, filtering processing, contrast adjustment, and background removal.

On the other hand, FIG. 9B shows a functional block diagram of the infrared image processing unit 160. The infrared image processing unit 160 includes an analog processing unit 161, an A / D conversion unit 162, an infrared shading correction unit 163, a binarization processing unit 164, and an identification information analysis unit 165.
The analog processing unit 161 performs analog correction such as gain / offset adjustment on the infrared image data from the infrared area sensor 114.
The A / D converter 162 converts the infrared image data subjected to analog correction into digital data.
The infrared shading correction unit 163 performs infrared shading correction on the input infrared image data. In infrared shading correction, input infrared image data is corrected according to variations in sensitivity of each element in the infrared area sensor 114 and the light quantity distribution characteristics of the infrared LEDs 111a to 111d.
The binarization processing unit 164 binarizes (0 or 1) the infrared image data that has been subjected to the shading correction, and outputs it.
The identification information analysis unit 165 functioning as an acquisition unit analyzes the identification information after performing processing such as correction of distortion by reading from the code image included in the binarized infrared image data as necessary. Output identification information. Note that the order of processing such as binarization and distortion correction may be appropriately selected in the order of high accuracy of identification information analysis.

Now, an original reading operation using the scanner device 40b of the present embodiment will be described with reference to the flowchart shown in FIG.
The platen cover 120 is opened by the user, and after the document is placed on the platen glass 102, the platen cover 120 is closed. At this time, the open / close sensor 121 detects that the platen cover 120 has shifted from the open state to the closed state (step 101). Upon receiving this detection, the reading controller 141 sends a control signal to the sensor controller 142, the illumination controller 143, and the scan controller 144 to execute the size detection of the document placed on the platen glass 102 (step 102). Then, the reading controller 141 determines an infrared imaging region based on the document size detection result (step 103). Next, the reading controller 141 sends a control signal to the scan controller 144, rotates the shutter unit 116 provided in the infrared light receiving unit 112, and stops the opening 116a on the lens corresponding to the determined infrared imaging region. Let

  Next, the reading controller 141 sends a control signal to the illumination controller 143 to light all the infrared LEDs 111a to 111d (step 104). Further, the reading controller 141 sends a control signal to the sensor controller 142 to execute infrared image reading by the infrared area sensor 114 (step 105). When the infrared image reading is completed, the reading controller 141 sends a control signal to the illumination controller 143 to turn off all the infrared LEDs 111a to 111d (step 106).

  Subsequently, upon receiving a scan operation or copy operation start instruction from the UI or the like (step 107), the reading controller 141 sends a control signal to the illumination controller 143 to turn on the illumination lamp 105 (step 108) and the scan controller. A control signal is sent to 144 to start the scanning operation by the full rate carriage 103 and the half rate carriage 104. Further, the reading controller 141 sends a control signal to the sensor controller 142 to cause the CCD image sensor 108 to read a visible image (step 109). When the reading of the visible image corresponding to the document size is completed, the reading controller 141 sends a control signal to the illumination controller 143 to turn off the illumination lamp 105, and sends a control signal to the scan controller 144. The rate carriage 104 is moved to the original position (position indicated by a solid line in FIG. 3) (step 110), and a series of processing is completed.

In step 105, the infrared image data read by the infrared area sensor 114 is input to the infrared image processing unit 160. When the document to be read includes a code image such as the printed matter 50 (see FIG. 1), identification information is acquired by performing various processes on the infrared image data by the infrared image processing unit 160. The The acquired identification information is sent to the identification information management server 20 (see FIG. 1) as described above.
In step 109, the visible image data read by the CCD image sensor 108 is input to the visible image processing unit 150. Then, after various processing is performed by the visible image processing unit 150, it is output to the printer device 40a and the like as document image data.

Now, the determination of the infrared imaging region in step 103 will be specifically described.
In the present embodiment, the reading controller 141 basically randomly selects an infrared imaging region from the first region S1, the second region S2, the third region S3, and the fourth region S4 shown in FIG. decide. However, an area where no original exists is generated depending on the size of the original to be read. Therefore, in the present embodiment, the infrared imaging region is determined from the region where the document exists based on the detection result of the document size.

FIG. 11 shows an infrared imaging area selection table stored in a memory (not shown) provided in the reading controller 141. This infrared imaging area selection table associates the document size with the document existing area where the document exists in the first area S1 to the fourth area S4.
When the document size is A3SEF (Short Edge Feed), the document exists in all of the first area S1 to the fourth area S4, so the document existence area is the first area S1, the second area S2, the second area S2, and the second area S2. It becomes 3 area | region S3 and 4th area | region S4. When the document size is A4SEF, the document exists in the first area S1 to the third area S3, but does not exist in the fourth area S4. Therefore, the document existing area is the first area S1. The second region S2 and the third region S3. Furthermore, when the document size is A4LEF (Long Edge Feed), the document exists in the first area S1 and the second area S2, but does not exist in the third area S3 and the fourth area S4. The document presence area is the first area S1 and the second area S2. Furthermore, when the document size is a postcard, the document exists only in the first area S1 and does not exist in the second area S2 to the fourth area S4. Therefore, the document existing area is the first area S1. Become.

  For example, when the document size is A3SEF, the reading controller 141 acquires the first region S1, the second region S2, the third region S3, and the fourth region S4 as the document presence region for the A3SEF from the infrared imaging region selection table. Then, the reading controller 141 selects one area at random from the four areas. For example, when the third region S3 is selected, the reading controller 141 sends a control signal to the scan controller 144, rotates the shutter 116 provided in the infrared light receiving unit 112, and the opening 116a is positioned on the third lens 115c. The shutter unit 116 is stopped at the position.

Here, in the present embodiment, since the reading unit 100 is provided with the cover 109, even if the user opens the platen cover 120 in this state and looks into the reading unit 100 through the platen glass 102, It is difficult to understand that the infrared image reading unit 110 exists and that the infrared image reading unit 110 reads the infrared image of the document itself. Even if it is known that infrared image reading is being performed, the position of the opening 116a of the shutter unit 116 that constitutes the infrared light receiving unit 112 is stopped by the presence of the cover 109. That is, it becomes difficult to visually confirm which region is selected as the infrared imaging region.
For this reason, for example, a situation in which the code image cannot be read by masking the selected infrared imaging region is less likely to occur.

  Further, since the cover 109 is provided in the reading unit 100, for example, when dust or the like enters from the upper side of the reading unit 100 for some reason, the entered dust is collected on the cover 109 and the infrared image reading unit 110. Are not directly attached to the first infrared LED 111a, the second infrared LED 111b, the third infrared LED 111c, the fourth infrared LED 111d, and the infrared light receiving unit 112. Accordingly, when dust is removed, the cover 109 needs to be cleaned, so that maintenance is good.

  In the present embodiment, an example in which a selected infrared imaging region, that is, a region having a size of a postcard size is read out of each of the first region S1, the second region S2, the third region S3, and the fourth region S4. However, the present invention is not limited to this, and for example, the entire selected infrared imaging region may be read.

<Embodiment 2>
FIG. 12 is a diagram illustrating a detailed configuration of the infrared light receiving unit 112 according to the second embodiment. The infrared light receiving unit 112 includes a housing 171, a support 172, an infrared area sensor 173, and a lens 174. Since other elements constituting the scanner device 40b are the same as those in the first embodiment, detailed description thereof is omitted.
The casing 171 has a cylindrical shape, and an infrared area sensor 173 is fixed to an inner bottom portion thereof. A cylindrical lens 174 is fixed to the upper portion of the infrared area sensor 173 in the housing 171. An opening is formed on the upper side of the lens 174.
The support body 172 is attached to the lower side of the housing 171 and supports the housing 171. The support 172 has one end attached to the housing 171 and extending in a direction perpendicular to the sensor surface of the infrared area sensor 173, and the first arm 172a from the other end of the first arm 172a. And a second arm 172b extending in a predetermined angular direction.
The infrared area sensor 173 is configured by a two-dimensional CMOS image sensor as in the first embodiment.
The lens 174 has a function of transmitting and collecting infrared light.
In the present embodiment, the housing 171 and the support 172 constitute a holding body.
A bearing 175 is attached to the second arm 172 b of the support body 172. The bearing 175 is fixed to the device frame 101 (see FIG. 3) of the reading unit 100. The bearing 175 supports the support body 172 and the housing 171 attached to the support body 172 via the second arm 172b so as to perform a circular motion.
Furthermore, a motor 176 as an example of a drive unit is attached to the other end of the second arm 172b of the support 172. When the motor 176 is driven, the support 172 and the casing 171 rotate in the circumferential direction.
Therefore, in the present embodiment, the switching unit is configured by the support 172, the motor 176, and the like.

FIG. 13 is a diagram for explaining the behavior of the infrared light receiving unit 112 when the infrared light receiving unit 112 shown in FIG. 12 is attached to the scanner device 40b shown in FIG.
In the present embodiment, as described with reference to FIG. 12, the casing 171 constituting the infrared light receiving unit 112 is attached to the scanner device 40b in an inclined state. The support 172 of the infrared light receiving unit 112 is connected to a motor 176 and rotates while maintaining an inclined state as shown in the figure.
In the first embodiment, the infrared imaging area is changed by switching the lens to be used. In the present embodiment, the infrared imaging area is changed by rotating the infrared light receiving unit 112 itself. Do.

  Also in the present embodiment, similarly to the first embodiment, a document reading operation is executed based on the procedure shown in FIG. However, in this embodiment, after the reading controller 141 determines the infrared imaging region in Step 103, the infrared light receiving unit 112 is rotated by sending a control signal to the scan controller 144, and the determined infrared imaging is performed. The infrared light receiving unit 112 is moved and stopped so as to face the region. At this time, the stop position of the infrared light receiving unit 112 is appropriately selected from the range facing the determined infrared imaging region. Therefore, even when, for example, the first region S1 is selected as the infrared imaging region, the actual imaging range by the infrared area sensor 173 provided in the infrared light receiving unit 112 is changed every time. .

Here, also in the present embodiment, since the cover 109 is provided in the reading unit 100 as in the first embodiment, the presence of the infrared image reading unit 110 including the infrared light receiving unit 112 and the infrared light receiving. It is difficult to visually confirm where the casing 171 of the unit 112 is facing.
Further, by providing the cover 109, it is difficult for dust that has entered the cover 109 to be blocked and directly attached to the lens 174 or the like constituting the infrared light receiving unit 112.

  In the present embodiment, the infrared imaging region is changed by rotating the infrared light receiving unit 112 in an inclined state. However, the present invention is not limited to this. For example, the infrared light receiving unit 112 is attached to the bottom surface of the apparatus frame 101 so as to move in the main scanning direction and the sub-scanning direction, and infrared light reception is performed at a position facing the infrared imaging region determined based on the document size detection result. The unit 112 may be moved. Even in this case, the presence of the cover 109 makes it difficult to visually confirm the stop position of the infrared light receiving unit 112.

<Embodiment 3>
FIG. 14 is a diagram illustrating a schematic configuration of the scanner device 40b according to the third embodiment. 14A shows a side sectional view of the scanner device 40b, and FIG. 14B shows a top view of the scanner device 40b. The basic configuration of the scanner device 40b is almost the same as that described in the first embodiment, but the infrared light receiving sections 112 are provided at four locations. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, the infrared light receiving unit 112 includes a first infrared light receiving unit 112a, a second infrared light receiving unit 112b, a third infrared light receiving unit 112c, and a fourth infrared light receiving unit 112d. Here, the first infrared light receiving unit 112a is provided adjacent to the first infrared LED 111a. Thereby, the 1st infrared light-receiving part 112a receives the infrared reflected light from 1st area | region S1 shown in FIG. Further, the second infrared light receiving portion 112b is provided adjacent to the second infrared LED 111b. Thereby, the 2nd infrared light-receiving part 112b receives the infrared reflected light from 2nd area | region S2 shown in FIG. Further, the third infrared light receiving portion 112c is provided adjacent to the third infrared LED 111c. Thereby, the 3rd infrared light-receiving part 112c receives the infrared reflected light from 3rd area | region S3 shown in FIG. The fourth infrared light receiving unit 112d is provided adjacent to the fourth infrared LED 111d. Accordingly, the fourth infrared light receiving unit 112d receives the infrared reflected light from the fourth region S4 illustrated in FIG.

  As in the first embodiment, a cover 109 is attached to the inside of the apparatus frame 101. The cover 109 is lower than the full rate carriage 103 and the half rate carriage 104, and constitutes a first infrared LED 111a, a second infrared LED 111b, a third infrared LED 111c, a fourth infrared LED 111d, and an infrared light receiving unit 112. The first infrared light receiving unit 112a, the second infrared light receiving unit 112b, the third infrared light receiving unit 112c, and the fourth infrared light receiving unit 112d are provided above. The cover 109 is provided so as to cover almost the entire bottom surface of the apparatus frame 101, and its end is fixed to the apparatus frame 101. The cover 109 is bent in a Z-shape, and an opening for allowing visible reflected light from the third mirror 106 </ b> C toward the imaging lens 107 to pass therethrough is formed in a part of the cover 109. The cover 109 has the light transmission characteristics shown in FIG. 4 as in the first embodiment.

FIG. 15 is a diagram illustrating a detailed configuration of the infrared light receiving unit 112 according to the third embodiment. In the present embodiment, the first infrared light receiving unit 112a, the second infrared light receiving unit 112b, the third infrared light receiving unit 112c, and the fourth infrared light receiving unit 112d constituting the infrared light receiving unit 112 are the same. Therefore, the first infrared light receiving unit 112a will be described as an example.
The first infrared light receiving unit 112 a includes a housing 181, an infrared area sensor 182, and a lens 183.
The casing 181 has a cylindrical shape, and an infrared area sensor 182 is fixed to the inner bottom portion thereof. A cylindrical lens 183 is fixed to the upper portion of the infrared area sensor 182 in the housing 181. An opening is formed on the upper side of the lens 183.
The infrared area sensor 182 is configured by a two-dimensional CMOS image sensor as in the first embodiment.
The lens 183 has a function of transmitting and collecting infrared light.
And in this Embodiment, the 1st infrared light-receiving part 112a, the 2nd infrared light-receiving part 112b, the 3rd infrared light-receiving part 112c, and the 4th infrared light-receiving part 112d which were comprised in this way are apparatus. It is attached to the frame 101 in a fixed state.
That is, in the first embodiment, the infrared imaging region is changed by switching the lens to be used, whereas in this embodiment, the infrared imaging region is changed by changing the infrared light receiving unit itself. Make changes. Also in this embodiment, since the cover 109 has a characteristic of transmitting near-infrared light, it does not optically interfere with infrared image reading.

  Also in the present embodiment, similarly to the first embodiment, a document reading operation is executed based on the procedure shown in FIG. However, after the reading controller 141 determines the infrared imaging area in step 103, a control signal is sent to the sensor controller 142, whereby the first infrared light receiving unit 112a, the second infrared light receiving unit 112b, and the third infrared light receiving unit are transmitted. The light receiving unit that captures the infrared image data is selected from the unit 112c and the fourth infrared light receiving unit 112d. Therefore, for example, when the first region S1 is selected as the infrared imaging region, the infrared image data of the infrared area sensor 182 provided in the first infrared light receiving unit 112a is captured.

Here, also in the present embodiment, since the cover 109 is provided in the reading unit 100 as in the first and second embodiments, the first infrared light receiving unit 112a and the second infrared light receiving unit 112 are configured. The presence of the infrared light receiving part 112b, the third infrared light receiving part 112c, the fourth infrared light receiving part 112d, the first infrared light receiving part 112a, the second infrared light receiving part 112b, the third infrared light receiving part 112c, It is difficult to visually confirm where the 4-infrared light receiving unit 112d is attached.
Further, by providing the cover 109, it is possible to suppress a situation in which dust that has entered the cover 109 is blocked and directly attached to the lens 183 and the like constituting the infrared light receiving unit 112.

In the first to third embodiments, each infrared LED and infrared light receiving unit 112 constituting the infrared image reading unit 110 are configured to be covered with the cover 109, but at least the infrared light receiving unit 112 is covered. 109 may be covered.
In the first to third embodiments, the cover 109 is configured by a single plate material. However, the cover 109 may be configured by a combination of a plurality of members.
Furthermore, in Embodiments 1 to 3, the cover 109 is configured using a resin. However, as long as it has a characteristic of absorbing light in the visible region and transmitting light in the near infrared region, The material may be other than resin.

  In the first to third embodiments, one of the first region S1 to the fourth region S4 is selected based on the document size detection result. However, the present invention is not limited to this. For example, the infrared light receiving unit 112 is fixedly disposed below the first region S1 where all documents can exist, and the infrared image receiving unit 112 always provides an infrared image of the first region S1. May be read. Also in this case, the infrared light receiving unit 112 is hidden by the cover 109, and visual confirmation becomes difficult.

It is a figure which shows an example of a structure of the system to which this Embodiment is applied. (A)-(c) is a figure for demonstrating the two-dimensional code image formed with a printer apparatus. 1 is a diagram illustrating a schematic configuration of a scanner device according to Embodiment 1. FIG. It is a figure which shows the light transmission characteristic of the cover provided in the reading part of a scanner apparatus. 3 is a diagram showing a configuration of an infrared light receiving unit in Embodiment 1. FIG. It is a figure for demonstrating the infrared imaging area | region by an infrared area sensor. (A) is a figure for demonstrating light reception of the infrared light in case the 1st area | region is made into the infrared imaging area, (b) is the figure of the infrared light in the case where the 2nd area | region is made into the infrared imaging area. It is a figure for demonstrating light reception. It is a functional block diagram of a control and image processing unit. (A) is a functional block diagram of a visible image processing part, (b) is a functional block diagram of an infrared image processing part. 6 is a flowchart for explaining a document reading operation using the scanner device of the first embodiment. It is a figure which shows an example of an infrared imaging area | region selection table. FIG. 5 is a diagram showing a schematic configuration of an infrared light receiving unit in the second embodiment. 6 is a diagram illustrating the behavior of an infrared light receiving unit in Embodiment 2. FIG. 6 is a diagram illustrating a schematic configuration of a scanner device according to Embodiment 3. FIG. FIG. 10 is a diagram showing a configuration of an infrared light receiving unit in a third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terminal device, 20 ... Identification information management server, 25 ... Identification information repository, 30 ... Document management server, 35 ... Document repository, 40 ... Image forming device, 40a ... Printer device, 40b ... Scanner device, 50 ... Printed matter, 60 ... Copy, 70 ... Network, 100 ... Reading section, 101 ... Device frame, 102 ... Platen glass, 102a ... Register reference position, 103 ... Full rate carriage, 104 ... Half rate carriage, 105 ... Illumination lamp, 105A ... Reflector, 106A DESCRIPTION OF SYMBOLS 1st mirror, 106B ... 2nd mirror, 106C ... 3rd mirror, 107 ... Imaging lens, 108 ... CCD image sensor, 109 ... Cover, 110 ... Infrared image reading part, 111a ... 1st infrared LED, 111b ... second infrared LED, 111c ... third infrared LED, 111d 4th infrared LED, 112 ... Infrared light receiving part, 112a ... 1st infrared light receiving part, 112b ... 2nd infrared light receiving part, 112c ... 3rd infrared light receiving part, 112d ... 4th infrared light receiving part, 113 ... Case, 114 ... Infrared area sensor, 115 ... Lens part, 115a ... First lens, 115b ... Second lens, 115c ... Third lens, 115d ... Fourth lens, 116 ... Shutter part, 116a ... Opening part, 120 ... Platen cover, 130 ... Control / image processing unit, S1 ... First region, S2 ... Second region, S3 ... Third region, S4 ... Fourth region

Claims (7)

A platen on which the document is placed;
A visible light receiving unit that receives visible light reflected from the document via the document table;
An infrared light receiving unit that receives infrared light reflected from the document through the document table;
An image reading apparatus that is disposed between the document table and the infrared light receiving unit and includes an infrared transmitting member that covers the infrared light receiving unit and transmits the infrared light.   The image reading apparatus according to claim 1, wherein the infrared transmitting member has lower light transmittance with respect to the visible light than light transmittance with respect to the infrared light.   The image reading apparatus according to claim 1, wherein the infrared transmitting member is black. A visible light source for irradiating the original with visible light via the original table;
An infrared light source that irradiates the original with infrared light through the original table;
The image reading apparatus according to claim 1, wherein the infrared light source is disposed closer to the infrared light receiving unit than the infrared transmitting member. A platen on which the document is placed;
A document image reading unit for reading a document image from the document placed on the document table;
A code image reading unit that reads a code image from a partial area of the document placed on the document table;
An image reading apparatus including a shielding member that is disposed between the document table and the code image reading unit and shields the code image reading unit from the document table side with respect to a user. The document image reading unit reads the document image based on a light reception result of light in a visible region reflected from the document;
The code image reading unit reads the code image based on a light reception result of light in an infrared region reflected from the document,
The image reading apparatus according to claim 5, wherein the shielding member has higher light transmittance with respect to light in the infrared region than light transmittance with respect to light in the visible region.   The image reading apparatus according to claim 5, further comprising a switching unit that moves and switches the partial area read by the code image reading unit.

Images