JPH10262136A - Original reading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To judge the external side of original width to be white in transmitting an original by means of a facsimile so as to transmit excellent image data and to enable detecting a boundary as against original width in reading the original as a scanner by permitting the coloring of an original carrier means to be a light color which is judged to be white when a read image is binary- processed. SOLUTION: An original reading device is provided with carrier means 7, 8, 9, 10, 11 and 14, a contact sensor 12 and a reading roller 13. Then, the reading roller 13 to be the background color of the original is constituted in the upper part of the contact sensor 12 by width for covering the whole reading width of the contact sensor 12. The coloring of the reading roller 13 is made to be the one by which about a half of the output of the contact sensor 12 is obtained compared with a case without the original. That is, the white of the reading roller 13 is adopted as the color to be judged white (gray, for example) in the binary-processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image reading apparatus and an apparatus having an image reading function.

[0002]

2. Description of the Related Art Today, with the development of information processing systems, various information processing devices have been developed. Among these devices, information processing devices such as an image reading device and a facsimile device having an image reading function have been widely used not only in offices but also in ordinary households.

A reading section used in these information processing apparatuses includes a reduction optical system for reducing an original image and leading the image to a photoelectric conversion element such as a CCD, and a CCD which brings the original image close to the original and converts the original image into a CCD.
And a 1: 1 optical system that guides the image at the same magnification.

FIG. 12 shows an example of a conventional document reading apparatus using an equal-magnification optical system, which includes an electric board (control board 201, main power supply 202), a recording section 203, a reading section 204, an operation section 205 and the like. ing.

The recording section 203 includes a recording sheet transport section 206 for sequentially feeding a plurality of recording sheets one by one to the recording section, and a recording apparatus 207 by an ink jet system. A reading unit 204 includes a document tray 208 for setting and stacking documents, and an upper document guide 2 for guiding a document conveying path.
09, a lower document guide 210, a document separation unit 211 for sequentially feeding a plurality of documents, a contact sensor 212 using a photoelectric conversion element, and a contact sensor 212 for bringing the document into close contact with the contact sensor 212 and transporting the document to a paper exit. It is constituted by a reading roller 213 which is attached by being urged.

[0006] The outer peripheral surface of the reading roller 213 may be formed in white according to the background color (background color) of the document, or may be formed in black instead of the background color of the document. . In addition, the contact sensor 212
Is mounted on a box-shaped contact sensor holder 214 rotatably mounted on the lower document guide 210, and the contact sensor holder 2 is rotated by a coil spring 215.
14 is urged by the reading roller 213.

[0007]

However, in the above conventional example, since the outer peripheral surface of the document reading roller 213 is white, when the document is transmitted by facsimile, the same color as the background color is applied outside the document width. The presence of the document reading roller 213 does not cause unnecessary image data to be transmitted, so that excellent image data can be transmitted. Since the original reading roller 213 having the same background color as the original exists, image data outside the original width is read as image data. In other words, when a document of a small paper size such as a postcard or a business card is read, the document is read as image data of the same size as the standard size (A4, B4, etc.) which is full of the document reading width, and the data amount increases. .

When the outer peripheral surface of the original reading roller 213 is black, when the original is read using a scanner for reading image data into the PC, there is a black original reading roller 213 different from the background color of the original. Therefore, the boundary can be detected with respect to the document width, so that the black image data outside the document width can be discarded and the image data can be read. That is, when a small-sized document such as a postcard or a business card is read, the original small-sized image data can be taken as it is. However, when the original is transmitted by switching to the facsimile function, there is a black original reading roller different from the background color outside the original width, so that extra black image data hitting outside the original width is transmitted. That is, a document having a size different from the size of the transmission document is transmitted. In addition, since the transmission document has a high percentage of black in this way, a recording-based facsimile that performs inkjet printing or toner printing on the receiving side consumes extra ink and toner more than usual to record extra black image data. There is a problem of doing it.

Therefore, an object of the invention described in claim 1 is to
When sending a document by facsimile, the outside of the document width is judged to be white and good image data can be sent without sending unnecessary image data. An object of the present invention is to provide a document reading device capable of detecting a boundary with respect to a document width.

An object of the present invention is to read image data by discarding image data outside the document width by detecting a boundary with respect to the document width when reading a document as a scanner for taking image data into a PC. To read a small paper size document such as a postcard or business card,
An object of the present invention is to provide a document reading apparatus capable of reading image data of a small size as it is.

An object of the invention described in claim 3 is to make the light color of the read white background gray, to determine that the image is white when the image is binarized, and to obtain good image data in facsimile original transmission. An object of the present invention is to provide a document reading apparatus that enables transmission and that can detect the paper width of a document by comparing the background color of the document with gray when used as a scanner.

A fourth object of the present invention is to provide a document reading apparatus which can be constituted at a cost equivalent to that of a conventional reading optical system as a light color which is determined to be white when a read white background is subjected to binarization processing of a read image. To provide.

An object of the present invention is to provide an image processing apparatus in which a white background has a width equal to or larger than a reading width of a reading means such as a reading sensor, and the width of the document is reliably detected and the width of the document is set as a background color. It is an object of the present invention to provide a document reading device capable of discarding unnecessary extra image data.

An object of the present invention is to provide a document reading apparatus in which a white paper is set as a light-colored roller so that a document is not jammed in a reading section and the conveyance can be performed more reliably. .

An object of the present invention is to provide a white light source for illuminating a document, at least one line of reading elements for reading a light image obtained from the document, and red, green and blue (hereinafter referred to as RG).
B) and a color document reading apparatus having a white background to be read on the upper surface facing the original document, and a color system similar to a color filter used for monochrome reading by the reading means in a color document reading apparatus having a white background to be read. When transmitting a document by facsimile, it is possible to determine that the outside of the document width is white, transmit good image data without transmitting unnecessary image data, and read the document as a scanner that takes image data into a PC. In some cases, there is a need to provide a document reading apparatus capable of detecting a boundary with respect to a document width.

An object of the present invention is to provide a document reading means comprising a light source of three colors of RGB for illuminating a document and a reading element for reading a light image obtained from the document, and a color having a reading white background on an upper surface facing the document. In a document reading apparatus, when a document is transmitted by facsimile with the color scheme of the white background to be read as the same color scheme as the light source color used for black and white reading by the reading means, the outside of the document width is judged to be white and extra Good image data can be sent without sending data, and PC
An object of the present invention is to provide a document reading apparatus capable of detecting a boundary with respect to a document width when reading a document as a scanner for reading image data.

According to a ninth aspect of the present invention, there is provided an original reading means comprising a white light source for illuminating the original, at least one line of reading elements for reading a light image obtained from the original, and three color filters of RGB. In a color document reading apparatus having a white reading background on the opposing upper surface, the color of the white reading background is set to a color similar to the color filter used for black and white reading of the reading means, and the document is read with a color filter of a color other than that used for black and white reading, When reading the original as a scanner that takes in the image data to the PC by detecting the paper width of the original by comparing the read output of the background color of the original with the output of the white background, image data outside the original width is detected by detecting the boundary with respect to the original width. Discard the original and read it, and read a small paper size original such as a postcard or business card and import it as image data of the same size In both cases, a document reading apparatus capable of comfortably performing copiers in color reading, transferring and recording image data unnecessarily without taking unnecessary time, and improving the quality without increasing the cost of the apparatus is provided. It is in.

An object of the present invention is to provide a document reading means comprising a light source of three colors of RGB for illuminating a document and a reading element for reading a light image obtained from the document, and a color having a reading white background on an upper surface facing the document. In the document reading apparatus, the color of the white background is set to be similar to the color of the light source for black and white reading, the document is read by a light source of a color other than the light source for black and white reading, the paper width of the document is detected, and the image data is read into a PC by a scanner. In this case, the image data outside the document width is discarded and the document is read by detecting the boundary with respect to the document width, and a small paper size document such as a postcard or a business card can be read and captured as the same size image data. The time required for reading copiers, image data transfer, and recording can be done comfortably without taking unnecessary time, which increases equipment costs. It is to provide a document reading apparatus to improve the quality.

An object of the invention described in claim 11 is to provide a document reading apparatus which comprises a series of document conveying means including a reading plate or a reading roller having a reading white background, and which can further reduce the size of the document reading apparatus. Is to do.

An object of the invention described in claim 12 is that an RGB three color filter or an RGB 3 color filter is used as the reading means.
In a color original reading apparatus using a color light source, by setting the white background to be read to a width equal to or larger than the reading width of the reading unit,
An object of the present invention is to provide a document reading apparatus capable of reliably detecting a document width and discarding unnecessary image data outside the document width as a background color of the document.

An object of the invention described in claim 13 is that the image reading apparatus is configured as a multifunction device having a facsimile function and a scanner function that can be loaded into an image PC, and a single common reading unit transmits a facsimile original. ,
Good image data can be transmitted without transmitting unnecessary image data outside the document width.When reading a document as a scanner that takes in image data to a PC, the boundary can be detected with respect to the document width. By discarding image data and reading it, it is possible to read image data of the same size when reading a small paper size document such as a postcard or business card, and to improve the quality without increasing the cost of the device. It is an object of the present invention to provide a document reading apparatus which can be improved.

[0022]

According to a first aspect of the present invention, there is provided a document reading apparatus having a document reading means having a transport means for transporting a document and a document reading means. The document reading apparatus is characterized in that the color arrangement of the conveying means is a light color which is determined to be white when the image read by the reading means is subjected to a binarization process. According to this configuration, when a document is transmitted by facsimile, the outside of the document width is determined to be white, and when the document is read by a scanner that captures image data into a PC, a boundary can be detected with respect to the document width.

According to another configuration for realizing the object of the invention according to the present invention, in a document reading apparatus having a document reading means and a feeding means for feeding a document, a color arrangement of the feeding means is provided. And a detecting unit configured to detect the width of the document by comparing the background color of the document and the light color to be determined as white when the image read by the reading unit is subjected to the binarization processing. The document reading apparatus is characterized in that: According to this configuration, when the scanner is used as a scanner that captures image data into a PC, image data outside the document width can be discarded and read by detecting the boundary with respect to the document width.

In a specific configuration for realizing the object of the invention according to the present application, the light color of the read white background is close to the slice level in the case of the black and white binarization processing. 3. The document reading apparatus according to claim 1, wherein the color is gray determined to be white in the conversion processing. According to this configuration, gray is determined to be white by the binarization processing, and good image transmission can be performed by facsimile transmission. In the case of a scanner, a boundary with respect to the document width can be detected.

In another specific configuration for realizing the object of the invention according to the present application, the reading means reads a light source illuminating a document and a light image obtained from the document. 3. The document reading device according to claim 1, wherein the document reading device comprises a reading element. According to this configuration, the reading unit in which the color arrangement of the read white background is light can be configured at the same cost as a conventional reading optical system using a white read background such as white or black.

According to another specific configuration for realizing the object of the invention according to the present application, the transporting means includes a roller having a width equal to or larger than the reading width of the reading means. The document reading device according to claim 1, wherein the document reading device is provided. According to this configuration, the width of the document can be reliably detected because the white background has a width equal to or larger than the reading width of the reading unit.

According to another specific configuration for realizing the object of the invention according to the present application, the color arrangement of the rollers is lightened as described in claim 6. In the device. According to this configuration, the original can be conveyed so as not to be jammed while maintaining the light color effect of the read white background.

According to another aspect of the present invention, a white light source for illuminating an original, a reading element for reading a light image obtained from the original, and a plurality of different colors are provided. An original reading means comprising a color filter of
In a document reading apparatus having a white background to be read on a surface opposite to a document reading position, the color of the white background to be read is similar to a color filter used for monochrome reading by the reading means. is there. According to this configuration, in a document reading apparatus using three color filters of red, green, and blue as the reading means, good image data can be transmitted in the case of facsimile transmission, and a scanner for capturing an image into a PC In the case of using it, the boundary can be detected with respect to the document width.

According to another aspect of the present invention, a light source for illuminating a document and a reading element for reading a light image obtained from the document are provided. In a document reading apparatus having a document reading unit to be configured and a white reading background on the upper surface opposite to the document reading position, the color of the white reading background is similar to the light source color used for monochrome reading by the reading unit. The document reading apparatus is characterized in that: According to this configuration, in a document reading apparatus using three color light sources of red, green and blue as the reading means, good image data can be transmitted in the case of facsimile transmission.
When used as a scanner for taking in an image into C, a boundary can be detected with respect to the document width.

According to another aspect of the present invention, a white light source for illuminating an original, a reading element for reading a light image obtained from the original, and a plurality of different colors are provided. In a document reading apparatus having a document reading unit constituted by a color filter and a white reading background on a surface opposite to the document reading position, the color of the white reading background is set to a color similar to the color filter used for monochrome reading by the reading unit. Make up,
Reading the original with a color filter of a color other than that used for reading the black and white, and detecting the paper width of the original by comparing the read output of the background color of the original with the output of the white background; In the device. According to this configuration, in a document reading apparatus that uses three color filters of red, green, and blue as the reading unit, when reading a document as a scanner that captures image data into a PC, a boundary is detected with respect to the document width and the document is detected. Image data outside the width can be discarded and read.

According to another aspect of the present invention, a light source for illuminating a document and a reading element for reading a light image obtained from the document are provided. A document reading device having a reading white background on a surface opposite to a document reading position, wherein the color of the reading white background is constituted by a color similar to a light source color used for monochrome reading by the reading device; An original reading device that reads the original with a light source of a color other than that used for monochrome reading, and detects the paper width of the original by comparing the read output of the background color of the original with the output of the white background. is there.
According to this configuration, in a document reading apparatus that uses light sources of three colors of red, green, and blue as a reading unit, when reading a document as a scanner that captures image data into a PC, a boundary is detected with respect to the document width and the document width is detected. Outside image data can be discarded and read.

In a specific configuration for realizing the object of the invention according to the present application, as described in claim 11, the document reading device has means for transporting the document. The document reading device according to any one of the first to tenth aspects. According to this configuration, the size of the apparatus can be reduced by arranging the transporting means efficiently.

According to another specific configuration for realizing the object of the invention according to the present application, the reading white background has a width equal to or larger than the width of the original read by the reading means. The document reading apparatus according to any one of claims 7 to 11, wherein: According to this configuration, the width of the document can be reliably detected, and unnecessary image data outside the document width can be discarded.

According to another specific configuration for realizing the object of the invention according to the present application, the document reading apparatus has a facsimile function and a scanner function for capturing an image into a computer. 13. The document reading apparatus according to claim 1, wherein: According to this configuration, one reading unit can perform both good image transmission of a facsimile document and reading of image data that discards image data outside the document width as a scanner.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the entire structure of a document reading apparatus according to a first embodiment of the present invention. In FIG. 1, a main body chassis 1 of the document reading apparatus, a control board 2 for controlling the apparatus, an operation panel 3 for operating the apparatus, a control board 4 for the operation panel 3, and a stack A light-colored reading roller 13 is disposed on the upper surface of the document tray 6 opposite to the reading-system contact sensor 12, and another document conveying system is disposed.

Next, the operation will be described. The original 5 having a plurality of sheets is rotated by a driving motor (not shown) in a direction indicated by an arrow in a direction indicated by an arrow in FIG.
Is urged toward the separation roller 7 to be conveyed to a wedge-shaped place between the friction piece 9 and the separation roller 7. Then, the plurality of originals 5 are separated one by one by the friction pieces 9, and the feed roller 10a is rotated by a drive motor (not shown) in the direction of the arrow shown in the figure to obtain the urging force of the opposing auxiliary roller 10b. Conveyed. The document transport guide 11 guides the document 5 from the separation roller 7 to a contact sensor 12 described later.

A reading roller 13 which is a feature of the present invention and serves as a background color of a document is formed on the upper portion of the contact sensor 12 so as to cover the entire reading width of the contact sensor 12. A light source (not shown) (not shown) that irradiates the document 5 is arranged inside the contact sensor 12. The original 5 read by the contact sensor 12 is transferred to the discharge rollers 1
4a is rotated by a drive motor in the direction of the arrow shown in the figure, and the urging force of the opposing auxiliary roller 14b is obtained to discharge the sheet outside the image reading apparatus in the direction of the arrow a shown.

Next, the color arrangement of the reading roller 13 will be described in detail. FIG. 2 is a diagram showing a read output of the contact sensor 12 shown in FIG. 2A shows the output of the contact sensor 12 when there is no original, and FIG. 2B shows the output when there is an original. The vertical axis shows the output of the contact sensor 12, and the horizontal axis shows the reading width direction. Is shown.

FIG. 2A shows the slice level when a black-and-white binarization process is performed at a position about half the output of the contact sensor 12 by a dashed line.
Is a color determined to be white in the binarization processing close to the slice level (gray in this embodiment).

FIG. 2B shows the output of the contact sensor 12 reading the original 5. More specifically, the output is a state in which the leading end (beginning of reading) of the document 5 is being read. At this time, b is the reading width of the document 5, and c is outside the width of the document (the background color of the document 5 at this time is a normal white color). Therefore, since there is a difference in the gray color arrangement between the original 5 and the reading roller 13, such an output waveform is obtained.

As described above, according to the first embodiment,
When a document is transmitted by facsimile, good image data can be transmitted without transmitting unnecessary image data to determine white outside the document width.

When a document is read by a scanner that takes image data into a PC, a boundary can be detected with respect to the document width, so that image data outside the document width can be discarded and read. That is, when a small-sized document such as a postcard or a business card is read, the small-sized image data can be directly used. Therefore, the quality can be improved without increasing the cost of the document reading device.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a sectional view showing the entire structure of a document reading apparatus according to a second embodiment of the present invention.

The second embodiment shown in FIG. 3 is different from that of FIG. 1 in that a reading roller 13 provided on the upper surface opposite to the contact sensor 12 and serving as a background color of a document is provided.
Is changed to the reading plate 15. All other configurations are the same as in FIG.

Similar to the case of the reading roller 13, the color of the reading plate 15 is set to a color close to the slice level and determined to be white in the binarization processing (gray in the present embodiment).
Therefore, the same effects as those of the first embodiment can be obtained in the second embodiment.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a sectional view showing the entire structure of a document reading apparatus according to the third embodiment of the present invention. FIG. 5 is an operation explanatory diagram of the document reading apparatus shown in FIG.

FIG. 4 shows the overall structure of a multifunction device having a facsimile function using a single reading unit and a scanner function that can be loaded into an external PC. FIG. 5 shows the opening and closing of the panel and the detached state of the inkjet cartridge, which are performed from the state of FIG. Here, an ink jet recording apparatus is employed as a recording system of the facsimile function.

In FIGS. 4 and 5, the apparatus has a paper feeding system A for supplying a recording sheet and a recording system B as a recording apparatus.
A reading system C for reading an image described on a document,
It is composed of an operation unit D.

The sheet feeding system A separates and feeds the recording sheets 102 placed on the sheet feeding cassette 101 one by one by a sheet feeding section including a sheet feeding roller 103 and a sheet feeding piece 104 for pressing the recording sheet 102. The recording sheet 102 is fed to a feed roller pair 105.
a and 105b, and are supplied to a recording system B described later. A front end sensor 106 such as a photo sensor or a micro switch for detecting the front end position of the recording sheet 102 is disposed near the front side of the recording system B. The paper feed cassette 101 is provided detachably with respect to the main body 107. Also, a paper feed roller 103, a paper feed piece 104, a feed roller 105
a, 105 b and the tip sensor 106 are provided on the main body 107.

The recording system B records an image on the recording sheet 102 supplied from the paper feeding system A according to an image signal transmitted from another apparatus or an image signal transmitted from the reading system C. Specifically, the platen roller 108 of the recording system B
The recording sheet 102 is conveyed, and ink droplets ejected from the inkjet cartridge 109 in accordance with the image signal adhere to the recording sheet 102 to form an image.

The recording sheet 102 on which a predetermined image has been formed is further conveyed in the direction of arrow a, and a pair of discharge rollers 110a, 110a
0b and discharged out of the apparatus, and the recording paper tray 11
1 is loaded. Platen roller 108, discharge roller 1
10a and 110b are provided in the apparatus main body 107, respectively.

The ink jet cartridge 109
As shown in FIG. 5, the recording cover 112 is opened in the direction of arrow c so that it can be detached from the apparatus main body 107 in the direction of arrow d.

Next, the operation will be described. The reading system C irradiates the original 113 with light, converts the reflected light into an electric signal, and transmits this signal to another device or to its own recording system B according to the operation mode. More specifically, a plurality of documents 113 are placed on a document mounting table 114 and a document tray 115, and the documents 113 are separated and fed one by one by a separation roller 116a and a pressure contact piece 116b pressed against the separation roller 116a. The transport rollers 117a and 117b and the discharge rollers 118a and 118b transport the paper and discharge it to the outside of the apparatus.

The reading roller 130, which is the most characteristic of this embodiment, is formed on the upper surface facing the reading unit 119 (using a contact sensor), and the color scheme is close to the slice level and white in the binarization processing as described above. (Here gray). The document mounting table 114, the document tray 115, the separation roller 116a, the transport roller 117a, the discharge roller 118a, the contact sensor 119, and the reading roller 130 are provided in the apparatus main body 107, respectively.

The operation section D is for switching operations such as a mode switching operation, a copy operation, a transmission operation, and a scanner operation, and is provided with keys according to various operations. The operation unit D is provided above the document conveying mechanism in the reading system C, and is configured to be rotatable with respect to the apparatus main body 107 in the direction of arrow e as shown in FIG. It should be noted that a handset (not shown) of a telephone for performing transmission and reception is provided at one end of the operation unit D.

FIG. 6 is a perspective view showing the arrangement and appearance of the electrical system of the document reading apparatus shown in FIG. In this embodiment, the system board 121a is provided on the bottom of the apparatus, and the power supply unit 121b is provided on the right side of the apparatus. Others include a board 121c for controlling the operation unit D, a relay board 121d, a board 121e for controlling a telephone and a telephone line, and an interface board 12 for connecting to an external computer.
1f.

Next, regarding the paper feed unit, the paper feed roller 103
Is a roller made of a material having a high friction coefficient such as silicon rubber, and is rotated in the direction of the arrow in FIG.
1. The uppermost recording sheet 102 is fed out. Paper feed strip 104
Is a sheet material such as urethane rubber containing cork,
It is rotatably supported by an arm (not shown), and is pressed toward the paper feed roller 103 by a spring (not shown) or the like.

Accordingly, when the paper feed roller 103 is rotated by a driving source (not shown), the paper feed roller 103 comes into contact with the recording sheet 102, and the uppermost recording sheet 1
02 is fed out one sheet. At this time, the plurality of recording sheets 102
Is fed out, the lower recording sheet 102 is prevented from being conveyed due to the contact friction with the sheet feeder 104, so that only the uppermost recording sheet 102 is fed by the feed roller pair 105.
a, 105b, and thereafter, the recording sheet 102 is conveyed by a pair of feed rollers 105a, 105b.

As the material of the recording sheet 102, a plain paper, a plastic sheet or the like or another material which can transfer ink can be used. In this embodiment, plain paper cut into B4 size and A4 size is used as the recording sheet 102, and the recording sheet 10 is used.
The sheet cassette 101 on which the sheet 2 is placed is stored in a predetermined position of the apparatus main body 107 shown in FIG.

FIG. 7 is a block diagram of a control system of the original reading apparatus shown in FIG. In FIG. 7, a control unit 121 for controlling the composite facsimile apparatus, a power supply unit 121b for supplying power to the entire apparatus, and a modem board unit 1
50 and NCU board unit 121e for connecting the telephone
And a display unit 151 for displaying the contents and the like input from the operation unit 121c.

The control unit 121 controls the CP which controls the entire apparatus.
U121a1, a ROM 121a2 storing various programs and various data, a RAM 121a3 used as a work area of the CPU for temporarily storing various data such as the number of recordings, storing and registering various data, and an input / output switching interface 121a7. have.

Reference numeral 121a4 denotes a line memory for storing an image of each line of image data. In the case of original transmission or copying, one line of image data from the original reading system C is stored. In this case, one line of decoded data is stored. The stored image data is added to the recording control code in the CPU 121a1 and output from the input / output switching interface 121a7 to the CPU B1 of the recording system B. CPUB1
The image recording is performed by decoding the recording system control code.

The image information to be transmitted is denoted by M 121 a 5.
An encoding / decoding unit that encodes by H encoding or the like, decodes received encoded image data, and converts the image data into image data. 121a6 is a memory buffer for storing the transmitted and received encoded image data. Also,
The peripheral computer 152 and the multifunction peripheral can be connected by the 121f interface board.

According to such a third embodiment,
When transmitting a document by facsimile, it is determined that the image is white outside the document width, so that unnecessary image data is not transmitted, and good image data can be transmitted.
When a document is read by a scanner that captures image data into the scanner, image data outside the document width can be discarded and only the image can be read by detecting a boundary with respect to the document width. That is, a small-sized document such as a postcard or a business card can be read and handled as it is as small-sized image data. Therefore, the quality can be further improved without increasing the cost of the document reading apparatus.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a sectional view showing the entire structure of a document reading apparatus according to a fourth embodiment of the present invention.

The difference between the fourth embodiment shown in FIG. 8 and the first embodiment shown in FIG. 1 is that the background of the original is placed on the upper surface facing the color contact sensor 12a.
The color reading plate 13a is configured to have a width covering the entire reading width of the color contact sensor 12a, and a light source (not shown in the present embodiment) for irradiating the original 5 is provided inside the color contact sensor 12a. LED is used, and the color of the reading plate 13a is similar to that of the light source. The other components are the same as those shown in FIG. 1, and thus the same reference numerals are given and duplicate explanations are omitted.

Next, the operation will be described. FIG. 9 shows FIG.
FIG. 6 is a diagram showing a read output of the contact sensor shown in FIG. FIG. 9A shows the output of the contact sensor when the green LED is turned on, and FIG. 9B shows the output display of the contact sensor when the red LED is turned on. 9 (a) and 9 (b), the vertical axis indicates the color contact sensor output, the horizontal axis indicates the reading width direction, and both indicate the output of the color contact sensor 12a reading the original 5. . More specifically, the output is a state in which the leading end of the document 5 is being read, and the ground color of the document 5 at this time is a normal white color.

In FIG. 9A, the reading is performed by turning on the green LED, and the color of the reading plate 13a is set to the same color green as the light source.
2a shows the output. Here, the slice level in the case where the binarization processing is performed at about half the position of the output is indicated by a dashed line.

Here, in general, the reflection output obtained by irradiating a light source (LED) to a plate of a similar color to the light source is substantially equal to the reflection output obtained by irradiating a white plate (that is, the maximum output). Therefore, the reflection output of the green reading plate becomes an output determined to be white in the binarization processing with respect to the previous slice level. Therefore, if this output is determined in black and white, the output of the reading plate 13a, which is the background of the document, is determined to be white.

In the case of FIG. 9B, when reading is performed by turning on an LED other than green (a red LED is used in this embodiment), the ground color of the reading plate 13a is changed to a green color. 3 shows the output of the color contact sensor 12a.
At this time, b in FIG. 9B is the reading width of the document 5, and c is outside the document width. This is because the background color of the original 5 and the reading plate 13
Such an output waveform is obtained because there is a difference in the coloration of a.

According to such a fourth embodiment,
When transmitting a document by facsimile, it is possible to transmit good image data without transmitting unnecessary image data, and when reading a document as a scanner, it is possible to detect the boundary with respect to the document width, An image can be imported to discard image data outside the document width.

[Fifth Embodiment] Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 10 is a sectional view showing the entire structure of a document reading apparatus according to a fifth embodiment of the present invention.

The fifth embodiment shown in FIG. 10 is the same as the color contact sensor 12 of the fourth embodiment shown in FIG.
The reading roller 13a is replaced with a reading plate 13a serving as a background color provided on the opposing upper surface of FIG. Other configurations are exactly the same as those in FIG. 8, and thus redundant description of the same configurations will be omitted.

In this case, the background color of the reading roller 15 is similar to that of the light source as in the previous embodiment (here, the green LED is used for monochrome reading, so that the background color of the reading roller 15 is used). The color is similar green.)

As described above, also in the case of the fifth embodiment,
The same effect as in the fourth embodiment is obtained, and the number of original JAMs is reduced.

[Sixth Embodiment] Next, a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a sectional view showing the entire structure of a document reading apparatus according to the sixth embodiment of the present invention.

The sixth embodiment shown in FIG. 11 is an example of a multifunction device having a facsimile function and a scanner function.

The difference between the apparatus shown in FIG. 11 and the multifunction peripheral according to the third embodiment shown in FIG. 4 lies in the configuration of the reading section, and a reading plate 120 and a contact sensor 11 using an LED light source.
9a. That is, the reading plate 120 of the present embodiment is configured on the upper surface facing the reading unit 119a, and the color of the reading plate 120 is the same as that of the fourth embodiment and is similar to that of the light source (here, black and white reading is green. , The background color of the reading plate is green).

The other mechanisms and operations are described in FIG.
5, the same as the multifunction peripheral according to the third embodiment described above, and the description of FIGS. 5, 6, and 7 is common to both the third embodiment and the sixth embodiment. I do.

According to the sixth embodiment,
When sending a document by facsimile, good image data can be sent without sending unnecessary image data.When scanning a document as a scanner, the boundary can be detected with respect to the document width. The original image can be read by discarding the outside image data. In other words, a small original such as a postcard or a business card can be used as image data with the small size.

Further, when reading color images, since the image data is only image data of the original, it can be carried out comfortably without taking excessive time for copier, image data transfer and recording, so that the quality can be improved without increasing the cost of the apparatus. Can be improved.

[Seventh Embodiment] Next, a seventh embodiment of the present invention will be described. As described above, FIG.
In the fourth embodiment shown in FIG. 10, the fifth embodiment shown in FIG. 10, and the sixth embodiment shown in FIG. 11, reading is performed by a contact sensor using a light source of RGB three colors. Although the reading section is constructed, the same effect can be obtained by similarly using a white light source, color filters of three colors RGB, and a reading element (CCD or the like) having at least one line. In this case, a reading plate having a color similar to the color of the filter used when reading black and white may be provided on the upper surface facing the reading unit.

[Other Embodiments] In each of the embodiments described so far, the ink jet recording system is configured as the recording means. However, an electrophotographic recording system using a toner (laser beam printer) or an ink sheet is used. Of course, a thermal transfer recording method using a thermal head may be used.

Further, in the fourth to seventh embodiments, the configuration of the green light source or the filter and the green reading plate is shown as an example. Of course, the same effect can be obtained.

[0085]

As described above, according to the first aspect of the present invention, an image obtained by reading the color arrangement of the conveying means is made a light color which is determined to be white when the image is binarized. When sending a document, the outside of the document width is determined to be white, so there is no danger of sending unnecessary image data.Therefore, good image data can be transmitted. Boundary detection becomes possible.

Further, according to the second aspect of the present invention, the color arrangement of the conveying means is formed of a light color which is determined by binarizing the read image to be white, and the background color and the light color of the original are compared. When scanning a document as a scanner that captures image data into a computer, it is possible to discard image data outside the width of the document by boundary detection and to read the image data without increasing the cost of the device. Can be improved.

Further, according to the third aspect of the present invention, the light color of the read white background is constituted by gray close to the slice level. When transmission is enabled and an image is taken in as a scanner, the boundary with the background color can be clearly detected.

Further, according to the fourth aspect of the present invention, the reading means is composed of the illumination light source and the reading element for reading the reflection of the read light white background. It can be configured at the same cost as the device.

Further, according to the fifth aspect of the present invention, since the conveying means has a width equal to or larger than the reading width of the reading means, the width of the document is reliably detected and the width of the document is set as the background color of the document. Outside unnecessary image data can be discarded.

Further, according to the sixth aspect of the invention, the color arrangement of the rollers is made lighter, so that the original can be transported more reliably while avoiding the JAM.

According to the seventh aspect of the present invention, the color arrangement of the white background read by the original reading apparatus is similar to the color filter used for monochrome reading, so that a plurality of color filters of different colors are used. In a facsimile transmission, a facsimile transmission determines that the outside of the document width is white and performs good image data transmission. When reading a document as a scanner, a boundary can be detected with respect to the document width.

According to the eighth aspect of the present invention, the color arrangement of the read white background of the original reading apparatus is similar to the light source color used for monochrome reading, so that a plurality of light sources of different colors are used. In a document reading device with a reading unit, in facsimile transmission, it is possible to determine that the outside of the document width is white and transmit good image data without transmitting unnecessary image data. Boundary detection for width.

Further, according to the ninth aspect of the present invention, the color arrangement of the white background read by the original reading apparatus is constituted by the same color as the color filter used for black and white reading, and the original is formed by a color filter of another color. The scanner reads the document and detects the paper width of the document by comparing the read output of the background color of the document and the output of the white background. Therefore, a scanner that reads image data into a computer using a document reading device that uses a plurality of color filters of different colors When reading a document as a document, the boundary can be detected with respect to the document width.Thus, image data outside the document width can be discarded and image data can be read, and a small paper size document such as a postcard or business card can be It can be read as image data.

Also, in the case of color reading, image data of only the original is used, so that copier, image data transfer and recording can be performed comfortably without taking unnecessary time, and quality can be improved without increasing the cost of the apparatus. It can be further improved.

Further, according to the tenth aspect of the present invention,
The color of the white background read by the document reading device is composed of colors similar to the light source color used for black and white reading, and the document is read with a light source of a different color, and the read output of the background color of the document and the white background output are compared. When a document is read as a scanner that captures image data in a computer using a document reading device that uses light sources of multiple different colors, the boundary of the document width is detected. The image data can be read by discarding the image data, and a small paper size original such as a postcard or a business card can be read as it is as the small size image data.

Also, in the case of color reading, since image data of only the original is used, the time for copier, image data transfer and recording can be carried out comfortably without taking unnecessary time, and the quality can be improved without increasing the cost. Can be done.

Further, according to the eleventh aspect of the present invention,
Since it has a means for transporting the original including the reading means,
It is possible to meet the demand for a more compact device.

Further, according to the twelfth aspect of the present invention,
Since the read white background has a width equal to or greater than the reading width of the document reading means, the width of the document can be reliably detected and unnecessary image data outside the document width can be discarded.

Further, according to the thirteenth aspect of the present invention,
Since the document reading device is configured as a multifunction device having a facsimile function and a scanner function capable of taking an image into a computer, a single reading unit as a multifunction device can transmit good image data by facsimile document transmission, and reads a document as a scanner. In this case, the boundary can be detected with respect to the document width.

In color reading, copiers, image data transfer and recording can be performed comfortably without taking unnecessary time, and quality can be improved without increasing costs.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an entire structure of a document reading apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a read output of a contact sensor shown in FIG.

FIG. 3 is a cross-sectional view illustrating the entire structure of a document reading apparatus according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating the entire structure of a document reading apparatus according to a third embodiment of the present invention.

FIG. 5 is an operation explanatory diagram of the document reading apparatus shown in FIG. 4;

FIG. 6 is a perspective view showing an electrical system arrangement and appearance of the document reading apparatus shown in FIG. 4;

FIG. 7 is a block diagram of a control system of the document reading apparatus shown in FIG.

FIG. 8 is a cross-sectional view illustrating an entire structure of a document reading apparatus according to a fourth embodiment of the present invention.

9 is a diagram showing a read output of the contact sensor shown in FIG.

FIG. 10 is a cross-sectional view illustrating the entire structure of a document reading apparatus according to a fifth embodiment of the present invention.

FIG. 11 is a sectional view showing the entire structure of a document reading apparatus according to a sixth embodiment of the present invention.

FIG. 12 is a configuration diagram of a conventional document reading apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body chassis 2 Control board 3 Operation panel 4 Panel control board 5,113 Document 6,115 Document tray 7,116 Separation roller 8 Preliminary conveyance plate spring 9 Friction piece 10 Feeding roller 11 Document conveyance guide 12,12a, 119,119a Contact sensor 13, 130 Reading roller 14 Discharge roller 15, 13a, 120 Reading plate 101 Paper feed cassette 102 Recording sheet 103 Paper feed roller 104 Paper feed piece 105 Feed roller 106 Tip sensor 107 Main body 108 Platen roller 109 Ink cartridge 110, 118 Discharge Roller 111 Discharge tray 112 Recording cover 114 Document table 116 Pressure contact piece 117 Transport roller 121 Control unit 121a System board 121a1 CPU 121a2 ROM 121a3 RAM 121a4 Line memo 121a5 encoding / decoding section 121a6 memory buffer 121a7 output switching interface 121b supply unit 121c operation unit 121e NCU board 121f interface board 151 display unit 152 peripheral computer

Claims (13)

[Claims] 1. A document reading apparatus having a document transporting means and a document transporting means for transporting a document, wherein the color arrangement of the transporting means is determined to be white when the image read by the scanning means is binarized and the color is determined to be white. An original reading device, comprising: 2. A document reading apparatus having a document transporting means and a document reading means for transporting a document, wherein the color arrangement of the transporting means is a light color which is determined to be white when an image read by the reading means is binarized. A document reading apparatus comprising: a detecting unit configured to detect a paper width of a document by comparing a background color of the document with the light color. 3. The light color of the read white background is close to the slice level in the case of black and white binarization processing and is gray which is determined to be white in the binarization processing.
Document reading device according to the above. 4. The document reading apparatus according to claim 1, wherein said reading means comprises a light source for illuminating the document and a reading element for reading a light image obtained from the document. 5. The document reading apparatus according to claim 1, wherein said conveying means includes a roller having a width equal to or greater than a reading width of said reading means. 6. The document reading apparatus according to claim 5, wherein the color of the rollers is light. 7. A document reading device comprising a white light source for illuminating a document, a reading element for reading a light image obtained from the document, a plurality of color filters of different colors, and a reading white background on a surface facing the document reading position. An original reading apparatus according to claim 1, wherein the color of the white background to be read is similar to that of a color filter used for monochrome reading by the reading means. 8. A document reading apparatus comprising: document reading means comprising a plurality of light sources of different colors for illuminating the document and a reading element for reading a light image obtained from the document; and a reading white background on the upper surface opposite to the document reading position. 2. The document reading apparatus according to claim 1, wherein the color arrangement on the white background is similar to the light source color used for monochrome reading by the reading unit. 9. A document reading means comprising a white light source for illuminating a document, a reading element for reading a light image obtained from the document, and a plurality of color filters of different colors, and a reading white background on a surface facing the document reading position. In the document reading device, the color of the read white background is configured by a color similar to a color filter used for monochrome reading by the reading unit, and the document is read by a color filter of a color other than that used for monochrome reading. A document reading device that detects the paper width of the document by comparing the output of reading the background color of the document with the output of the white background. 10. A document reading apparatus comprising: a document reading means comprising a plurality of light sources of different colors for illuminating a document and a reading element for reading a light image obtained from the document; and a white reading background on a surface facing the document reading position. The color arrangement of the read white background is composed of colors similar to the light source color used for monochrome reading by the reading means, and the original is read with a light source of a color other than the color used for monochrome reading, and the background of the original is read. A document reading apparatus for detecting a paper width of a document by comparing a color reading output with the white background output. 11. The document reading apparatus according to claim 7, wherein the document reading apparatus includes a unit that conveys the document. 12. The document reading apparatus according to claim 7, wherein the read white background has a width equal to or greater than a document reading width of the reading unit. 13. The document reading apparatus according to claim 1, wherein the document reading apparatus has a facsimile function and a scanner function for capturing an image into a computer.