JP3486149B2 - Image reading device and recording medium - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus suitable for, for example, a facsimile machine or an electronic bulletin board,
And a storage medium storing a program for controlling the image reading apparatus.

[0002]

2. Description of the Related Art A so-called electronic bulletin board is a contact image scanner (hereinafter, contact image scanner is abbreviated as "CIS") for reading images such as characters and figures written with a felt pen on a white writing sheet. ) Or a thermal printer for recording an image obtained by CIS on a recording paper, and has a function of copying an image on a writing sheet onto the recording paper.

Here, the CIS is a linear type in which a large number of light receiving elements are arranged in series along the width direction of the writing sheet. In the CIS, the light receiving elements are divided into blocks and each block is divided into blocks. Some have seams between them. The block is a portion formed in units of light receiving chips, and one block corresponds to one light receiving chip.

In recent electronic bulletin boards, it is possible to copy with two recording colors of red and black using a dedicated thermal paper. In such an electronic bulletin board, the light sources of different colors are exclusively turned on / off, and the light-receiving color by CIS is alternately switched to acquire the dot data by the line-sequential method. For example, when reading an image from a writing sheet via the CIS, yellow and red LEDs (light emitting diodes), which are light sources, are switched alternately during reading one line. When the yellow LED emits light, the red and black pixel portions are recognized as the same color portion by the light receiving element, and yellow dot data is obtained accordingly, while when the red LED emits light, the black pixel portion Red dot data that captures only the pixel portion can be obtained. Then, the dot data obtained for each of these colors is converted into output data for recording including the recording colors of red and black in the data content through arithmetic processing such as a microprocessor, and the recording processing is performed based on this output data. .

[0005]

By the way, in the CIS having a seam between the above-mentioned blocks, because of the structure, a sufficient amount of light cannot be obtained for the light receiving element in the vicinity of the seam. was there. In such a case, if an image read from the entire writing sheet is recorded on the recording paper, a black recording line is generated in the vertical direction depending on the joint between the blocks. Therefore, when reading a monochrome image via this type of CIS, it is a good idea to erase the data obtained from the vicinity of the joint between blocks before converting the dot data obtained in response to light reception into output data. It is said that.

However, as described above, in the case of obtaining the dot data for each color by switching the light receiving color, the above problem is solved from the viewpoint of obtaining the dot data for each color of the light captured by the light receiving element. It was not considered without any measures taken. In such a case, for example, even if the dot data obtained during yellow emission is valid, there is incorrect data in the dot data obtained during red emission that captures the vicinity of the joint between blocks as a black pixel portion. Then, the same problem as described above will occur.

On the other hand, considering the sensitivity of the light receiving element, the vicinity of the boundary between the white and black pixel portions of the background is easily regarded as red, for example, depending on the light receiving level, and when an image read from the entire writing sheet is recorded on recording paper. For example, there is a problem that a red recording line appears immediately after a black recording line along the width direction of the recording paper.

The present invention has been proposed in view of the above points, and optimizes data for each color obtained by reading an image in a column order, and a vertical direction or a horizontal direction orthogonal to the column is set. An image reading device that can prevent the appearance of extra colors even along the direction, and a program for controlling the image reading device that can be read by a computer.
The purpose is to provide a recorded recording medium.

[0009]

In order to achieve the above object, the image reading apparatus of the present invention according to claim 1 uses a linear light receiving means configured by dividing a large number of light receiving elements into blocks. , An image reading device for reading an image of an input sheet in a column order while alternately switching the light-receiving color, and when reading an image through the linear light-receiving means, a color is received from the light-receiving element of each block according to the switching of the light-receiving color. From dot data color-by-color acquisition means for separately obtaining dot data and dot data of each color obtained by the dot-data-by-color acquisition means, from the joint between the blocks
The data obtained by the light receiving elements that are separated by the specified number of light receiving elements.
Is the data corresponding to the background color of the input sheet
A determining means for determining whether or not the receiving
The data obtained by the optical element is the background color of the input sheet.
If it is determined that the data is the corresponding data,
The data of the specified number of dots obtained from the light receiving element between the seam of the input sheet and the light receiving element is applied to the background color of the input sheet.
And a seam data correction means for correcting the corresponding data.

According to such an image reading apparatus, from the dot data obtained for each color of each column, the data of a predetermined number of dots corresponding to the vicinity of the joint between the blocks, which is easily recognized as a black pixel, is the background color of the input sheet. Equivalent to
The dot data that has undergone such processing can be treated as data that includes valid color information because it is corrected by the data. Therefore, it is possible to prevent the appearance of extra colors. Especially, it is obtained near the joint between blocks.
Data is isolated, in other words, its vicinity
If no consecutive pixels are found in the
Corrected data to the data corresponding to the ground color of the input sheet
Therefore, it is possible to obtain confusing data with a certain probability.
Can be erased.

[0011]

[0012]

An image reading apparatus according to a second aspect of the present invention is the image reading apparatus according to the first aspect, wherein the seam data correcting means receives light on one side of the seam between the blocks or on both sides thereof. Data of a certain number of dots obtained from the element corresponds to the background color of the input sheet
Correct the data .

According to such an image reading device, in addition to the effect of the image reading device according to claim 1 ,
It is possible to erase data obtained from one side or both sides based on the joint between blocks, which is apt to cause color misunderstanding depending on how the light receiving element receives light, as confusing data.

Further, the image reading apparatus of the invention described in claim 3 is the image reading apparatus according to claim 1 or claim 2, said seam data correction means, and modify the contents of certain data Later, of the modified data,
At least the light receiving element adjacent to the seam between the blocks
The data corresponding to is removed from the dot data .

According to such an image reading apparatus, in addition to the effect of the image reading apparatus according to claim or claim 2, for example, enter a misleading Datasheet
After disabling the contents of the data by modifying the data corresponding to the ground color, among the corrected data, at least blanking
Unnecessary data can be excluded from the dot data by removing the data corresponding to the light receiving element adjacent to the joint between the locks .

Further, an image reading apparatus according to a fourth aspect of the present invention is the image reading apparatus according to any one of the first to third aspects, wherein the processing of the seam data correction means is performed. An output data generation unit for generating recording output data including a plurality of recording colors in the data content is provided by further performing a predetermined arithmetic processing on the dot data obtained through the above process.

According to such an image reading device, in addition to the effect of the image reading device according to any one of claims 1 to 3 , an output for recording is made based on dot data including proper color information. Data can be generated, and by performing recording for each recording row based on this output data, it is possible to prevent the appearance of extra colors in the vertical direction orthogonal to the recording row.

[0019]

[0020]

[0021]

[0022]

According to a fifth aspect of the present invention, there is provided a recording medium in which a computer is arranged in a column order while alternately switching the light receiving color via a linear light receiving means configured by dividing a large number of light receiving elements into blocks. a computer-readable recording medium recording a program for causing a function as an image reading apparatus for reading an image of the input sheet, the computer, when reading the image through the linear light receiving means, receiving the blocks Dot data color-by-color acquisition means for acquiring dot data for each color according to the switching of the light-receiving color from the element, and the above-mentioned dot data color-by-color acquisition
From each color dot data obtained by means, the
Receivers separated by a specified number of light receiving elements from the joints between blocks
The data obtained by the optical element is the background color of the input sheet.
A discriminating means for discriminating whether or not the data is equivalent,
The data obtained by the light receiving element by
It is determined that the data corresponds to the background color of the input sheet.
Between the blocks and the light receiving element
Above a predetermined number of dots of the data obtained from the light receiving elements in
A program for functioning as a seam data correction means for correcting data corresponding to the ground color of the input sheet is recorded .

According to such a storage medium, by operating the CPU based on the stored program,
The operation of the image reading device according to the first aspect can be realized.

[0025]

[0026]

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a block diagram showing a control unit of a facsimile apparatus having a copying function as an embodiment of the image reading apparatus according to the present invention. In this embodiment, unlike the conventional electronic bulletin board, the present invention is applied to a facsimile machine, but both the facsimile machine and the electronic bulletin board generally realize a reading function and a recording function through similar means. Has been done. Therefore, detailed illustration and description of the already known operation mechanism relating to reading and recording will be omitted. In addition, since this embodiment has a feature in the copy function, points related to the function will be mainly described.

As shown in FIG. 1, the control unit of the facsimile apparatus includes a CPU 10, an NCU 11, a RAM 12 and a modem 1.
3, ROM 14, EEPROM 15, gate array 1
6, codec 17, DMAC 18, reading unit 21, recording unit 22, operation unit 23, display unit 24, and external connection unit 2
It is roughly configured by including 5 and the like. CPU10, N
CU11, RAM12, modem 13, ROM14, EE
The PROM 15, the gate array 16, the codec 17, and the DMAC 18 are connected to each other by a bus line 26. The bus line 26 includes an address bus, a data bus,
And control signal lines. In the gate array 16,
The reading unit 21, the recording unit 22, the operation unit 23, the display unit 24, and the external connection unit 25 are connected. A public telephone line 27 is connected to the NCU 11.

The CPU 10 controls the operation of the entire facsimile apparatus. The NCU 11 is connected to the public telephone line 27 and performs network control. The RAM 12 is used as a line buffer memory for the work area of the CPU 10 and the developed area of the read image. The modem 13 performs modulation and demodulation of facsimile data. ROM14 is
Data such as programs executed by the CPU 10 and set values are stored. The EEPROM 15 stores various flags and setting information. The gate array 16 is a CPU
10 functions as an input / output contact point between each of the units 21 to 25.
The codec 17 encodes and decodes facsimile data. The DMAC 18 mainly writes and reads data to and from the RAM 12.

The reading unit 21 includes, for example, a contact image scanner (CIS) 21a and LEDs 21b and 21c that emit yellow and red light as light sources, and has a function of reading an image from an input sheet such as a document. Here, the CIS 21a is a linear one in which a large number of light receiving elements are arranged along the width direction of the input sheet.
In a, the light receiving element is divided into blocks and a joint is provided between the blocks. Specifically, the block is
This is a portion formed in units of light receiving chips, and one block corresponds to one light receiving chip. A light source switching method is adopted as the reading method, and when reading a one-line pixel row on the input sheet, the yellow and red LEDs 21b and 21c are alternately switched. The recording unit 22 has a function of recording an image on recording paper with a thermal printer or the like. Here, the recording method of the thermal printer is as follows.
A method of recording with a color recording color is used, and as the thermal paper, one having a layer that develops a color for each of red and black in accordance with the energization time of the heating element of the thermal head is used. The operation unit 23 is for transmitting an operation signal to the CPU 10 in response to an operation button pressed by the user.
The display unit 24 includes an LCD (Liquid Crystal Display) and displays the operating state of the device. The external connection unit 25 is used when connecting an external device such as a personal computer to the facsimile device.

The main points of the present invention will be described. When an image is read from an input sheet based on the copy function, the CPU
The 10 obtains dot data by a line-sequential method based on the light receiving signal obtained from the light receiving element of the CIS 21a while alternately controlling ON / OFF of the two LEDs 21b and 21c.
The two LEDs 21b and 21c are turned on once, for example, during reading of one line. When the yellow LED 21b emits light, for example, red and black pixel portions on the input sheet are captured by the light receiving element as the same color portion, and yellow dot data is obtained accordingly. On the other hand, red LED
When 21c emits light, only the black pixel portion is captured by the light receiving element, and red dot data is obtained accordingly. Then, the CPU 10 logically operates the yellow dot data and the red dot data in one read line, and temporarily stores the dot data obtained as a result of the operation in the line buffer memory (RAM) 12 as output data for red recording. . Further, the CPU 10 temporarily stores the red dot data as it is in the line buffer memory 12 as the output data for black recording, and operates the thermal printer based on the output data for red and black recording, so that the red and black on the recording paper. A colored image is formed with two recording colors.

Here, the CIS 21a has a seam between each block, but in the light receiving element near this seam, a sufficient amount of light may not be obtained due to the structure or optical reasons. Therefore, the CPU 10 erases each of the yellow dot data and the red dot data so as to invalidate the data of a predetermined number of dots obtained from the light receiving element in the vicinity of the joint between the blocks when they are isolated. After that, output data for red and black recording is generated. Further, the CPU 10 erases the data corresponding to the vicinity of the seam between the blocks, and then removes the data itself as unnecessary data that should be removed.
Further, with respect to the output data for red and black recording, the CPU 10 also removes the data of the predetermined number of dots corresponding to the vicinity of the seam between blocks as unnecessary data to be removed, and then prints it on the thermal printer based on the output data. Is being done. According to this, without using the data obtained from the vicinity of the joint between blocks via the CIS 21a, it is possible to prevent the appearance of an extra color corresponding to the joint along the vertical direction orthogonal to the recording row. Of.

On the other hand, when recording based on the output data, the CPU 10 compares the output data of the recording column to be recorded at this time with the output data of the next column. Then, in the output data of the current recording row, when the recording color data in which the recording color is black is black and the subsequent recording color data of the next row is different from the previous row, the CPU 10 determines that the output data of the next row is the corresponding red color. The recording color data of is removed and recording is performed for each column based on the output data that has undergone such processing. The CPU 10 also performs the same processing when the recording colors of the current recording row and the next row are changed from red to black and vice versa. According to this, when an image is recorded in two colors of red and black for each recording row, even immediately after a black recording line is formed along the horizontal direction of the recording row, it should originally be black or white near the edge of the line. However, it is possible to avoid a state where an extra red recording line appears.

That is, the CIS 21a realizes a linear light receiving means constituted by dividing a large number of light receiving elements into blocks. When reading an image through the linear light receiving means, the CPU 10 obtains the dot data by color obtaining means and the dot data by color obtaining means that obtains dot data for each color from the light receiving element of each block according to the switching of the light receiving color. From the dot data of each color, the data of the specified number of dots obtained from the light receiving element near the joint between blocks
It realizes a seam data correcting means for correcting .

Further, the CPU 10 further performs a predetermined arithmetic processing on the dot data obtained by the dot data color-by-color acquisition means, thereby recording a series of output data for recording including a plurality of recording colors in the data content. thereby realizing the output data generation means to generate each.

The ROM 14 records a program for controlling an image reading device for reading images in a column order while alternately switching the light receiving color via a linear light receiving means configured by dividing a large number of light receiving elements into blocks. Note
A recording medium, when reading an image through the linear light receiving means, dot data color-by-color acquisition means for obtaining dot data for each color from the light receiving element of each block according to the switching of the light receiving color, and the dot From the dot data of each color obtained based on the data color-based acquisition program, as seam data correction means for correcting the data of a predetermined number of dots obtained from the light receiving element near the seam between the blocks
It realizes a recording medium for recording a program for making it function .

[0038]

Next, the operation of the facsimile apparatus having the above configuration will be described with reference to the drawings.

FIG. 2 is a flow chart showing an operation procedure involved in the reading process of the facsimile apparatus, FIG. 3 is a flow chart showing an operation procedure involved in the recording processing of the facsimile apparatus, and FIG.
6 to 6 are explanatory views conceptually showing the flow of data in the reading process and the recording process. It should be noted that “0” shown in FIGS. 4 to 6 indicates that the corresponding color does not exist, while “1” indicates that the corresponding color exists. For convenience, the cell representing one dot is extremely simplified as one corresponding to one of the light receiving element or the heat generating element, and “Dr” is the address of each light receiving element, and “Dw” is each heat generating element. It is used as a symbol to distinguish the addresses of.

As shown in FIG. 2, when the copying function is executed, the reading process is first started, and the CPU 10 requests the reading unit 21 to convey the input sheet line by line (S1). .

When the input sheet is conveyed by one line, CP
U10 first causes the yellow LED 21b to emit light (S
2) At this time, the yellow dot data corresponding to the emission color is obtained by capturing the reflected light from the input sheet via the light receiving element of the CIS 21a (S3). This yellow LED2
When 1b emits light, red pixels and black pixels on the input sheet are regarded as pixels of the same color according to the emission color of yellow. Further, as well shown in FIG. 4, since between Dr8 and Dr9 and between Dr16 and Dr17 corresponds to the joint between blocks, two dots on the left side of this joint (hatched portion) are formed. In the light receiving element, there is a possibility that some kind of color may be perceived although there is originally no colored pixel.

Subsequently, the CPU 10 replaces the yellow LED 21b with the red LED for the same line of the input sheet.
21c is caused to emit light (S4), and at this time, the reflected light from the input sheet is captured via the light receiving element of the CIS 21a to obtain red dot data corresponding to the emitted color (S4).
5). When the red LED 21c emits light, the red pixel portion on the input sheet is difficult to capture with the same emission color, and only the black pixel is captured according to the emission color. At this time, as well shown in FIG.
Between 8 and Dr9 and between Dr16 and Dr17 correspond to the joint between blocks, and therefore, the light receiving element of 2 dots (hatched portion) on the left side of this joint does not originally have a black pixel. Nevertheless, it may be mistakenly recognized as a colored pixel.

The CPU 10, which has obtained dot data for each color of yellow and red as described above, uses the dot data of each color for two dots to the left of the joint between blocks (Dr7, 8).
And the data contents of Dr15, 16) are forcibly erased to be "0" (S6). At this time, the CPU 10
It is determined whether or not the data content of, for example, Dr6 or Dr14 following the dot is "0", and if "0" that cannot be captured as a colored pixel, it is regarded as an isolated dot in the entire dot data, and 2 near the joint. Erase the data contents corresponding to the dots. On the other hand, when it is determined that the data for 2 dots near the joint is not isolated, the CPU 10
Handles the dot data for each color obtained in S3 and S5 without erasing the data contents corresponding to the two dots.

Further, the CPU 10 removes the data itself for one dot (Dr8 and Dr16) to the left of the seam between the blocks from the dot data which has been subjected to the processing of S6 (S7). As a result, the data content erroneously captured from the light receiving element near the seam between the blocks, which originally has no colored pixel, is optimized.

When the dot data of each color is obtained through the process of S7, the CPU 10 performs a logical operation process on these data to obtain the data indicating the red recording portion and the black recording portion as shown in FIG. The output data is generated, and the output data for one line of red and black recording is generated by combining these data (S8). That is, the portion captured as the colored pixel only with the yellow dot data is the portion to be recorded in red. On the other hand, a portion captured as a colored pixel in both the yellow dot data and the red dot data is a portion to be recorded in black (see FIG. 5). The red-black recording output data generated by the CPU 10 is used in the next recording process.

After the above-described processing for one reading line, the CPU 10 determines whether or not the reading processing for one input sheet is completed based on the signal from the paper discharge sensor or the like (S9), and the rear end of the input sheet is detected. And the like are detected by the paper discharge sensor (S9: YES), the CPU 10 ends the reading process.

When the reading process for one input sheet is continued in the middle of the process (S9: NO), the CPU 10
Returns to S1 to read the next line.

The reading operation for one line in such a series of processing is almost instantaneously performed, and, for example, the light emission of the LEDs 21b and 21c for one reading line is performed within an extremely short time.

Next, as shown in FIG. 3, the recording process is started. This recording process can be started when the output data for at least one line is obtained in the above S8, and is controlled by the CPU 10. The reading process and the recording process proceed almost at the same time.

In the recording process, the CPU 10 causes the above S
Output data for red-black recording corresponding to the 8th to nth columns is obtained (S21).

Then, the CPU 10 removes the data itself for one dot (Dw7 and Dw14) to the left of the seam between the blocks from the data content included in the output data (S22). As a result, the data that has been optimized corresponding to the seam between the blocks in the previous reading processing step is further converted into appropriate output data in the recording processing step.

Similarly, the CPU 10 obtains the output data for red and black recording corresponding to the (n + 1) th column of the next column from the above S8 (S23), and based on the data content included in the output data, from the joint between blocks. The data itself for the left one dot (Dw7 and Dw14) is removed (S
24). The output data of the next column may be sequentially fetched into the RAM 12 by the direct memory access method not via the CPU 10 but via the DMAC 18 or the like.

When the output data of the n-th column and the output data of the (n + 1) th column are obtained in this way, the CPU 10 compares the recording colors before performing the recording process described later based on at least the output data of the (n + 1) th column. Processing is performed (S25). This recording color comparison processing is performed by comparing the output data obtained in S22 and S24 so that the pixel having the black recording color in the output data of the current recording row (n-th row) is red immediately after that. This is a process of erasing the pixels of the recording color of the above from the output data of the next column (n + 1th column). Specifically, as shown well in FIG. 6, the corresponding data (Dw7 to Dw1) in the output data of the next column that becomes a red pixel continuously from a black pixel.
In 1), there is a high possibility that the data is erroneously read corresponding to the vicinity of the boundary between the black pixel and the background, and the content of the corresponding data (Dw7 to Dw11) in the (n + 1) th column is “0”.

In the series of processing as described above, the CPU 1
For 0, the recording process is performed based on the output data of the previous n-th column (S26). At this time, the recording paper is conveyed line by line via a stepping motor or the like, and when the recording paper is temporarily stopped, it is recorded by the two-color recording method of red and black according to the data content of the output data. One line will be formed on the recording paper.

After the above processing for one recording line,
The CPU 10 determines whether or not to finish the recording process for one recording sheet based on a signal from the sheet discharge sensor or the like (S2).
7) When the trailing edge of the recording paper is detected by the paper discharge sensor (S27: YES), the CPU 10 ends the recording process.

When the recording process for one recording sheet is in the middle of the process and continues (S27: NO), the CPU 10
The process returns to S21 to record the next line.

The recording operation for one line in such a series of processing is performed in parallel with the data processing, that is, during the recording processing of one recording line, the next row after the comparison processing of the recording colors is completed. The output data of the eyes are sequentially RAM
It is stored in 12 or the like and is put in a state of waiting for output.

That is, even if there is a pixel recognized as red by the reading process immediately after the pixel recorded black based on the output data of the nth column in S26, it is not recorded as it is, and the (n + 1) th pixel is recorded. Colored pixels are not formed based on the output data of the columns. Even when the black and red pixels are reversed, an optimum recording result can be obtained through similar processing.

Therefore, according to the facsimile apparatus having the above configuration and operation, from the dot data obtained by reading each color of each line, the data of 2 dots corresponding to the vicinity of the joint between the blocks which is easily recognized as a black pixel. Is erased as "0", the dot data that has been subjected to such processing can be treated as data including valid color information, and the inter-block can be obtained even in the vertical direction orthogonal to each line for reading an image. You can prevent the appearance of extra colors depending on the seams.

Of the output data generated for each color of each line, the output data of the next column showing that, for example, a black pixel in the output data of the current recording column appears as a red different from that. Since the contents of the data inside are erased, the output data that has undergone such processing can be used for recording as data including appropriate color information. For example, red and black 2 can be used along the horizontal direction (line direction) for recording an image. When recording in color, it is possible to avoid a state in which a red recording line appears immediately after a black recording line.

The present invention is not limited to the above embodiment.

For example, the number of dots of data that is erased or removed from the dot data is not limited to 2 dots, and the number of dots of the output data that is removed is not limited to 1 dot. Depending on the light receiving state of the light receiving element near the seam between the blocks in, the number of dots may be larger than that. further,
Not only one side of the joint, but also a predetermined number of dots on both sides may be erased.

With regard to the facsimile apparatus, the operation when executing the copying function has been described, but when the dot data obtained by the reading process is held as it is or transferred to the personal computer, when the received image is recorded, or when the personal computer is used. Even when an image is recorded in response to an output request from the computer, the same effect as above can be obtained.

A contact type image scanner or the like is preferably used as the linear light receiving means, but the linear light receiving means is not limited to the contact type, and a linear CCD (Charge Coupled Dev) employing a reduction optical system is used.
ice: charge coupled device).

Further, as the reading method, a method of switching light sources of different emission colors is used, but a method of switching emission colors by a color filter using one light source may be used.

The input sheet is not limited to a white background, and may be any sheet as long as an image can be captured for each color by the CIS 21a which is a linear light receiving means.

The recording means may be an ink jet type printer or a laser type printer in addition to a thermal printer.

Accordingly, the recording paper may be ordinary cut paper instead of the thermal paper.

The apparatus to which the present invention is applied is not limited to the facsimile apparatus, and the present invention can be applied to, for example, the electronic bulletin board described in the section of the prior art or the copying apparatus having only the copying function.

The operation to be performed by the control circuit may be an operation controlled by a personal computer or the like.

Other than the above-mentioned features of the present invention, the design can be changed as appropriate as long as the effects of the present invention are not impaired.

[0073]

As described above, according to the image reading apparatus of the first aspect of the invention, from the dot data obtained for each color of each column, the dot data near the joint between blocks which is easily recognized as a black pixel. Since the data of the corresponding predetermined number of dots is corrected to the data corresponding to the background color of the input sheet, the dot data that has undergone such processing can be treated as data that includes valid color information, and can be used as a column to read an image. It is possible to prevent the appearance of extra colors depending on the seams between the blocks even in the vertical direction orthogonal to the above.

In particular, when the data obtained from the vicinity of the joint between blocks is isolated, in other words, when continuous pixels are not recognized in the vicinity, the data obtained from the vicinity is used as the background color of the input sheet. Since it is corrected to the data corresponding to , the confusing data can be erased with a certain probability.

Further, according to the image reading apparatus of the invention described in claim 2 , in addition to the effect of the image reading apparatus described in claim 1, it is easy to misunderstand the color due to the way the light receiving element receives light. Data obtained from one side or both sides of the joint between blocks can be erased as confusing data.

Further, according to the image reading apparatus of the invention described in claim 3 , in addition to the effect of the image reading apparatus of claim 1 or 2 , for example, confusing data is added to the background color of the input sheet. after disabling the contents of the corresponding data by modifying <br/> the data, the correction data
At least adjacent to the joint between the blocks.
Unnecessary data can be excluded from the dot data by removing the data corresponding to the optical element .

Further, according to the image reading device of the invention described in claim 4 , in addition to the effect of the image reading device described in any one of claims 1 to 3 , dot data including proper color information is provided. It is possible to generate output data for recording based on the output data, and by performing recording for each recording row based on this output data, it is possible to prevent the appearance of extra colors in the vertical direction orthogonal to the recording row. be able to.

[0078]

[0079]

According to the storage medium of the invention described in claim 5 , the operation of the image reading apparatus according to claim 1 can be realized by operating the CPU based on the stored program. .

[0081]

[Brief description of drawings]

FIG. 1 is a block diagram showing a control unit of a facsimile apparatus having a copying function as an embodiment of an image reading apparatus according to the present invention.

FIG. 2 is a flowchart showing an operation procedure involved in a reading process of a facsimile device.

FIG. 3 is a flowchart showing an operation procedure involved in recording processing of the facsimile apparatus.

FIG. 4 is an explanatory diagram conceptually showing a data flow in a reading process.

FIG. 5 is an explanatory diagram conceptually showing a data flow in a reading process.

FIG. 6 is an explanatory diagram conceptually showing a data flow in a recording process.

[Explanation of symbols]

10 CPU 12 RAM 14 ROM 15 EEPROM 16 gate array 21 Reader 22 Recording section 21a Linear light receiving element 21b Yellow LED 21c Red LED

Claims (5)

(57) [Claims] 1. An image reading apparatus for reading an image of an input sheet in a column order while alternately switching a light receiving color via a linear light receiving means configured by dividing a large number of light receiving elements into blocks, wherein the linear When reading an image through the light receiving means, the dot data color-based acquisition means for obtaining dot data for each color from the light-receiving element of each block according to the switching of the light-receiving color, and the respective colors obtained by the dot data color-based acquisition means from among the dot data, given from the seams between the blocks
Data obtained by the light receiving elements separated by the number of light receiving elements
Is the data corresponding to the background color of the input sheet
And the data obtained by the light receiving element by the determining means.
Is determined to be the data corresponding to the background color of the input sheet
Then, the seam between the blocks and the light receiving element
Data of the specified number of dots obtained from the light receiving element in between
An image reading apparatus comprising: a seam data correction unit that corrects data corresponding to the ground color of the input sheet . 2. The input seam data correction means converts the data of a predetermined number of dots obtained from light receiving elements on one side or both sides of the seam between the blocks into the input sheet.
The image reading apparatus according to claim 1, wherein the data is corrected to data corresponding to the background color . 3. The seam data correction means corrects the contents of predetermined data, and then corrects a small amount of the corrected data.
At least connect to the light receiving element adjacent to the joint between the blocks.
The image reading apparatus according to claim 1, wherein the corresponding data is removed from the dot data . 4. An output for generating recording output data including a plurality of recording colors in the data content by further subjecting the dot data obtained through the processing of the seam data correction means to a predetermined arithmetic processing. having a data generating means, the image reading apparatus according to any one of claims 1 to 3. 5. An image reading apparatus for reading an image of an input sheet in a column order while alternately switching a light receiving color through a linear light receiving means configured by dividing a large number of light receiving elements into blocks in a computer. A computer-readable memory that records a program for functioning as a device.
The recording medium is a dot data color-by-color acquisition means for obtaining dot data for each color from the light-receiving element of each block when the computer reads an image through the linear light-receiving means. And the dot data color-dependent acquisition means
From each color dot data obtained by the above bromide
Light receiving elements that are separated from the joint between
The data obtained by the child corresponds to the background color of the above input sheet
Discriminating means for discriminating whether or not the data is
The data obtained by the light receiving element by another means is
It is determined that the data corresponds to the background color of the input sheet
Between the light receiving element and the seam between the blocks.
Upper fill data of a predetermined number of dots obtained from that light-receiving element
Seam data to correct the data corresponding to the ground color of the force sheet
Record a program to make it function as a data correction means.
A computer-readable recording medium characterized by the above.