JPH0574979B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a method for reading a color original image.
The present invention relates to an image input device that can almost simultaneously obtain color image signals of a plurality of colors representing a color original image and blurred image signals of a plurality of colors corresponding to the color image signals of the plurality of colors.

[Prior art]

Conventionally, in this type of image input device used in the printing field, etc., both an imaging signal and its blur signal were obtained simultaneously by a configuration as shown in FIG. 1, for example. To explain this, an original 101 is wound around a drum 100 and rotated, and the scanning point A of the original 101 and its vicinity are irradiated with light from a light source 102.
The reflected light from the original passes through imaging lenses 103 and 104 and reaches photoelectric converters 105 and 106.
Optical systems such as lenses 103 and 104 move together in the direction of the rotation axis of drum 100 to scan original 101. One photoelectric converter 105 is arranged at the imaging point position for point A on the original 101, while the other photoelectric converter 106 is arranged so that image input information of both point A and its vicinity can be input. The photoelectric converter 106 may be placed at a defocused position that is out of focus with respect to point A.
The aperture is enlarged. Therefore, both the imaging signal and its blur signal are obtained from the photoelectric converters 105 and 106 at the same time.

In the image reading method shown in FIG. 1, it is possible to simultaneously obtain both the image signal and its blur signal for only one point on the document being scanned.
The above method cannot be applied when using a photoelectric converter such as a CCD in which a sensor array for photoelectric conversion is arranged in one dimension. Conventionally, as a method of creating a blur signal for each sensor element of a CCD, the signal output from the CCD is temporarily stored in a memory to form two-dimensional image information, and then n×m pixels are A two-dimensional filtering process (where n and m are integers) was performed to obtain a blurred signal.

However, this blur signal creation method requires n×m product-sum operations, so for example, when filtering with 13×13 pixels, 169 product-sum operations and 169 product-sum operations are required to obtain the average value. It is necessary to perform one division. Therefore, even if there is an arithmetic element that can be accessed in 1 μsec (microsecond) per pixel and can also perform sum-of-products calculations, it would be difficult to use that arithmetic element to create a blur signal for a single pixel of interest. It will take at least 169μsec. Furthermore, as will be described later, there is a drawback that the scanning area increases to obtain a blurred signal, which slows down the reading time.

FIG. 2 shows an example of a copying machine equipped with an image input device to which the present invention can be applied. Here, 201 is a reading head of an image input device to which the present invention can be applied;
02 is a multi-noise type inkjet recording head that performs recording using a binary ON/OFF recording method. As a general rule, the pitch of the reading sensors of the reading head 201 and the pitch of the recording elements of the recording head 202 are equal, and the number of both elements is the same. Original document 203 for input and recording paper 204 for printing
are simultaneously moved in the vertical direction by a drive motor 206 via rollers 205 and read head 201
and recording head 202 are simultaneously moved horizontally by a drive motor 208 via a conductive member 207 such as a belt or wire. At that time, the image signal input from the reading head 201 is sent to the data creation section 2.
09, the recording head 20 is subjected to predetermined processing.
2.

FIG. 3A shows the scanning state of the reading head 201 when reading one scan of the original 203 with the configuration shown in FIG. 2, and the scanning area necessary for creating a blur signal with the reading head 201. Here, 3
Reference numeral 01 denotes a reading sensor array of the reading head 201, which consists of five elements a ₁ to a ₅ arranged in a row in the sub-scanning direction, and scans the original 203 while moving from left to right in the main scanning direction. 302 indicates an image area necessary for scanning one line with the reading sensor array 301, and 303 indicates an image area necessary to create a blur signal for each pixel of the image area 302.

FIG. 3B shows an example of the operation when forming a blurred signal (blurred microphone signal) with the sensor array 301 described above. As shown in the figure, for example, the blur signal b ₁ for the pixel a ₁ is obtained by the following equation (1).

b ₁ = 1/25 ( ₂₂ 〓 ⁱ⁼¹ ₃ 〓 ^j=1 P _i・C _i +a _j・C _j ) (1) However, C _i and C _j are filtering coefficients for creating blurred signals.

However, since the image data obtained by scanning one line of the sensor array 301 is only the image area 302 surrounded by A ₁ , A ₂ , A ₃ , and A ₄ , the above formula (1)
To calculate , image data from P ₁ to _{P 10} outside the area surrounded by A ₁ , A ₂ , A ₃ , and A ₄ is also required.
Therefore, if the sensor array 301 scans only one line, the amount of data is insufficient, and image data of the previous scan line is also required. Similarly, image area 302
To create _a blur signal for _the pixel _a5 at the lower _{right end} of Partial image data is also required.

Note that although the case where the blur signal is calculated using 5×5 pixels is shown here, if the input document 203 is a halftone document and the image is read by sampling, moire will occur, so this moire should be prevented from occurring. , or 13× to detect any moiré that occurs
An averaging filter of about 13 pixels may be used.

When obtaining a blurred signal using the method described above,
A memory with a capacity equivalent to the blur signal generation image area 303 surrounded by R ₁ , R ₂ , R ₃ , and R ₄ shown in FIG. 3A is required, and the sensor array 301 also scans three lines. Only after the image is read out by the operator, it becomes possible to calculate the blur signal of each pixel in the one-line image area 302 surrounded by A ₁ , A ₂ , A ₃ , and A ₄ shown in FIGS. 3A and 3B.

As described above, when creating a blur mask signal using a line sensor such as a CCD using the conventional method, the memory capacity becomes extremely large.

The calculation time required to obtain the blur mask signal becomes extremely long.

The necessary line scanning is larger than the effective screen width, and the blur mask signal cannot be obtained until after additional vertical scanning is performed, which increases the image reading time.

Since the blur mask signal generation area and the imaging signal generation area are different, the control means becomes complicated.

There were other drawbacks.

〔the purpose〕

The present invention has been made in view of the above-mentioned problems, and the object thereof is to obtain a plurality of color image signals representing a color original image and a plurality of colors corresponding to each color of the plurality of color image signals. An object of the present invention is to provide an image input device that can obtain a blurred image signal of 1 and 2 almost simultaneously with a simple configuration.

[Means for Achieving the Object] The following points are mainly listed as characteristic configurations of the present invention for achieving the above-mentioned object.

(a) A color document image is formed on a first sensor array in which a plurality of photoelectric conversion elements to which color separation filters of a plurality of colors are periodically attached are arranged in an array, and the first sensor array is configured. The first sensor array is connected to a second sensor array in which multiple-color photoelectric conversion elements are arranged in an array, and have a larger area than the photoelectric conversion elements, and to which color separation filters of multiple colors are periodically attached. (hereinafter referred to as the first configuration); and (b) the image is formed on a document image area that includes the document image area to be imaged and is wider than the document image area (hereinafter referred to as the first configuration); forming a blurred image signal for each color by calculating the plurality of color blurred image forming signals for each color, and delaying the plurality of color image signals output from the first sensor array for each color. Accordingly, color image signals of a plurality of colors are output for each color in synchronization with the blurred image signal for each color (hereinafter referred to as the second configuration).

[Function] According to the first configuration, the present invention provides a reading position of the first sensor array that outputs color image signals of multiple colors representing a color original image, and a reading position of the first sensor array that outputs color image signals of multiple colors representing a color original image, and Since the reading positions of the second sensor array that output blur image forming signals always match, a complex circuit configuration is used to electrically align the positions, taking into consideration the amount of deviation of these reading positions and the reading scanning speed. It is possible to obtain color image signals of multiple colors and blurred image forming signals of multiple colors at the same position on a color original image without any problem.

Further, according to the present invention, with the second configuration described above, it is possible to always obtain color image signals of a plurality of colors corresponding to blurred image signals for each color obtained by calculating blurred image forming signals of a plurality of colors for each color. Because you can
Color image signals of a plurality of colors and blurred image signals of each color necessary for processing each color can be obtained almost simultaneously.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

4A and 4B each show an example of the configuration of the optical system of the image input device of the present invention. In Figure 4A, 40
Reference numeral 1 denotes a document table on which a document is set, and 402 denotes an aperture member having an area larger than the mask area required for creating a blur mask signal. The optical images formed on the imaging sensor group 409 and the blur signal forming sensor group 410 are prevented from interfering with each other.

403 is a light source, 404 is a light source cover, which irradiates the original set on the original table 401 with the light of the light source 403, and the light image reflected from the original passes through the imaging lens 405 and reaches the half mirror 406. and separate. The light image transmitted through the half mirror 406 passes through a reflection mirror 407 that changes the optical path, and forms an image on an imaging sensor group 409 formed on the same common substrate 411. Also, half mirror 40
The light image reflected by the surface of 6 passes through a reflection mirror 408 that changes the optical path, and forms an image on the blur signal forming sensor group 410 formed on the above-mentioned common substrate 411.
The light receiving area of this blur signal forming sensor group 410 is
It is formed larger than the light receiving area of the imaging sensor group 409.

FIG. 4B shows mirrors 406 to 40 that separate light images.
8 is not used.

FIG. 5 shows the sensor groups 409 and 4 in FIGS. 4A and 4B.
10 detailed configuration examples are shown. In this example, it is assumed that a blur signal is created from 5×5 pixels. An imaging sensor group 409 and a blur signal forming sensor group 410 formed on the same substrate 411 create an imaging signal or a blur signal, which also serves as color separation signals for color printing. 504 is a shift register of the imaging sensor group 409; 505 is a shift register of the blur signal forming sensor group 410; both shift registers 50
4,505 is also formed on the same substrate 411 described above. The symbol P _ij attached to each sensor in this figure (however, i
= 1 to 5, j = 1 to 3), Q _ij (however, i = 1 to 9,
i in j=1 to 3) represents the element number, and j represents the color information position. For example, j is red when j=1, j=2
When j=3, it is green, and when j=3, it is blue.

Each imaging element of the imaging sensor group 409 is A ₁ ,
The area surrounded by A ₂ , A ₃ , and A ₄ forms one pixel,
Three colors are separated within this area. Also,
Each imaging element of the blur signal forming sensor group 410 is also shown in the figure.
A region surrounded by B ₁ , B ₂ , B ₃ , and B ₄ forms one pixel, and three colors are separated within this region. In order to form a blur signal using 5×5 pixels, the blur signal forming sensor group 410 changes the length between B ₁ and B ₄ in the figure to the length between A ₁ and A ₄ of the elements of the imaging sensor group 409. 5
It's doubled.

Furthermore, the center of the optical axis in Figures 4A and B is the center of the optical axis in Figure 5.
The center position of B ₁ and B ₄ and the center position of A ₁ and A ₄ are reached. Therefore, the blur signal for the image formed in the range of A ₁ , A ₂ , A ₃ , and A ₄ is formed by the sensor group in the range of B 1 , B ₅ , B ₆ , and B ₄ , and similarly, the blur signal for the image formed in the range of A 1 , A 2 , A ₃ , and A 4 is formed by the sensor group in the range of B ₁ , B 5 , B 6 , and B 4 . _Five ,
The blur signal for the image formed in the range of A ₆ and A ₃ is
It is formed by a group of sensors ranging from B ₂ , B ₇ , B ₈ , and B ₃ .

In order to create a blur signal, it is necessary to further multiply each pixel signal by a predetermined filtering coefficient and calculate the average value of the sum of the multiplication results, as shown in the above-mentioned equation (1). In order to realize this operation, a two-dimensional averaging filter S (x, y) is defined as It is divided into a function n(y). Then,
This filter S(x,y) is given by the following equation (2).

S(x,y)=m(x)n(y) (2) In the present invention, for example, an M variable transmission density filter whose transmittance is made variable according to the location function m(x) in the x-axis direction described above is used. The filtering in the X-axis direction is performed using the long sensor 410 for blurring signal formation and the variable transmission density filter. By performing filtering in the y-axis direction using a conventional electrical method, two-dimensional filtering can be performed at high speed and at low cost.

6A to 6C show examples of filtering coefficients. This figure A shows two-dimensional filtering coefficients, this figure B shows one-dimensional filtering coefficients in the X-axis direction, and this figure C shows one-dimensional filtering coefficients in the y-axis direction. A blur signal for the center position of 5×5 pixels is created using the mask shown in FIG. A, but the same result can be obtained by multiplying the coefficient of the mask shown in FIG. B by the coefficient of the mask shown in FIG. C. here,
The coefficient in this figure A is the transmission density. In the embodiment of the present invention described below, in order to realize the filter shown in Figure A, a variable transmission density filter according to the coefficients shown in Figure B and an electrical one-dimensional filter according to the coefficients shown in Figure C are used. use

FIG. 7 shows the blur signal forming sensor group 410 in FIG.
A state in which a variable transmission density filter 701 is placed above the image and one-dimensional optical filtering is applied is shown. The symbol R _ijk shown in FIG. 7 (however, i=1 to 9,
j=1 to 3, k=1 to 5), i indicates the sensor position, j indicates color identification, and k indicates transmission density. For example, if the transmission density is 1.0 when k=1 or k=5, the transmission density is 0.5 when k=2 or k=4, and the transmission density is 0.2 when k=3. Since a variable transmission density filter is not used in the imaging sensor group 409, the _fifth
This is the same as explained in the figure.

FIG. 8 shows the variable transmission density filter 701 described above.
The case where a filter in which the transmission density indicated by k of R _ijk changes continuously is used.

FIG. 9 shows a more specific example of the arrangement. As shown in the figure, a color separation filter 9 is placed on a group of blur signal forming sensors 410 formed on the same common substrate 411.
02 and the variable transmission density filter 701 are stacked like a sandwich and fixed. In addition, the board 4
A color separation filter 903 is installed on the image forming sensor group 409 formed on the top 11, and if necessary,
ND filter 904 is stacked and fixed on top of it. ND filter 904 connects both sensor groups 409, 4
Adjust the amount of incident light to adjust the sensitivity in step 10. The illustrated variable transmission density filter 701 has a uniform density in the longitudinal direction (y-axis direction) of the figure, and has a uniform density in the longitudinal direction (x-axis direction) of the figure.
It is formed to have variable transmittance density in the axial direction). Furthermore, 902-1, 902-2, and 903-3 indicate a red filter, a green filter, and a blue filter, respectively, for color separation.

FIG. 10 shows a configuration example of a peripheral circuit that processes the output signals from the shift registers 504 and 505 to form a blur signal and an imaging signal. Imaging sensor group 4
The shift register 504 of 09 is the imaging sensor group 4.
It is used to extract the output signal of 09 to the outside of the sensor. In addition, the shift register 505 of the sensor group 410 for creating a blur signal includes a variable transmission density filter 7.
01 is used to extract the signal filtered by the one-dimensional blur filter to the outside of the sensor group 410 for creating blur signals. 1005 is an image amplifier (hereinafter referred to as a video amplifier) that amplifies the serial analog video signal output from the shift register 505, and 1006 is a video amplifier that similarly amplifies the serial analog video signal output from the shift register 504. It's an amplifier. 10
07 is an analog-to-digital (A/D) converter that converts the analog video signal amplified by the video amplifier 1005 into a digital video signal;
008 is an A/D converter that converts the analog video signal amplified by the video amplifier 1006 into a digital video signal.

1009 and 1010 are digital switches for grouping red, green, and blue signals and extracting output signals. A/D converter 100
The digital signals continuously output from 7, 1008 are repeatedly output in the order of blue, green, and red, so this digital switch 1009, 10
10, the digital signals are arranged and sent by color. That is, when creating a blur signal and an imaging signal, it is necessary to create them separately for red, green, and blue groups.

Reference numerals 1011 to 1013 are shift registers each having five stages provided for each color.The shift register 1011 receives video data related to blue from five locations from the blue contacts of the digital switch 1009, and the shift register 1012 receives video data from the edge contacts of the digital switch 1009. Video data related to the edges are included in 5 places,
The shift register 1013 has a digital switch 1.
Video data related to red from the red contact of 009 is 5
Enter the passage. At this time, when five or more pieces of data are entered, the oldest data is deleted and shifted in order, but the data in the registers are output in parallel.

1014 to 1016 are corresponding shift registers 1
This is a conversion table that is accessed by parallel output data of 011 to 1013, and is made up of RAM (random access memory), PROM (program memory), or ROM (read-on memory).
The conversion tables 1014 to 1016 send data corresponding to the product of the one-dimensional filtering coefficient in the y-axis direction corresponding to the input parallel data and the parallel data to the corresponding adders 1017 to 1019. C ₁₁ to C ₁₅ of the conversion table 1014, C ₂₁ to C ₂₅ of the conversion table 1015, and
C ₃₁ to _{C 35} each indicate a unit conversion table storing data of the product of the i-direction one-dimensional filtering coefficient of R _ijk shown in the figure and the input data. Here, C _ij
i indicates the color information position, and j indicates the element number of the sensor group 410. That is, a conversion table is provided for each color and element.

Adders 1017-1019 add five pieces of data input from corresponding conversion tables 1014-1016. 1020 to 1022 are conversion tables for division that output average values corresponding to data input from the corresponding adders 1017 to 1019. In principle, these conversion tables 1020 to 1022 are conversion tables that reduce the value to 1/25 when creating a blur signal with 5×5 pixels, but the mutual sensitivity of the blur sensor group 410 and the imaging sensor group 409 is The value is not necessarily 1/25 due to the difference in the amplification factors of the video amplifiers 1005 and 1006. Using these conversion tables 1020 to 1022, a value is obtained by multiplying the addition data by an appropriate coefficient by relative comparison with each color blur signal and each color image forming signal.

In the above configuration, the operation for creating blur signals for the imaging pixels at positions P ₅₁ to _{P 53} will be described with reference to FIG. 11.

When the reflected light image of the original is formed on the sensor groups 409 and 410, data y _i expressed by the following equation (3) is output from the blur signal generation sensor group 410 to the shift register 505.

y _i = ₅ 〓 ^j=1 D _ij ×E _j (3) However, D _ij is the filter 7 including the color separation filter.
01,902 transmittance, E _j is the distribution luminous intensity of the input light beam in the longitudinal direction (x-axis direction) of the long sensor of the sensor group 410, i is the register position of the shift register 505, and j is the longitudinal direction of the long sensor Indicates the location of

The data y _i stored in the shift register 505 is read out from the clock signal CLK1, amplified by the video amplifier 1005, and then sent to the A/D converter 10.
After the data is converted into a digital video signal in step 07, the data is sorted by color data by a digital switch 1009, and the data is transferred to the corresponding shift register 101.
1 to 1013.

In this way, at the 15th clock of clock signal CLK1, each position data r ₅₁ to r ₉₃ stored in the shift register 505 is transferred to the subsequent stage as corresponding data r ₅₁ ′ to r ₉₃ ′, as shown in FIG. are stored in shift registers 1011 to 1013. Data r ₅₁ ′ to _{r 93} ′ of shift registers 1011 to 1013 are converted to C _ij by conversion tables 1014 to 1016, respectively.
It is converted to data of ×y _i . C _ij is the multiplication coefficient. Therefore, the output of each adder 1017 to 1019
S _i is given by the following equation (4).

S _i = ₅ 〓 ^j=1 C _ij ×y _i (4) From the previous equation (3) to equation (4) becomes the following equation (5).

S _i = ₅ 〓 ^j=1 [C _ij × ( ₅ 〓 ^j=1 D _ij ×E _j )] (5) Equation (5) matches the above-mentioned equation (1) except for the coefficients. Therefore, the output signals from the division conversion tables 1020 to 1022 become blurred signals corresponding to the imaged pixels _P51 to _P53 .

FIG. 12 shows the operation when obtaining blurred signals for the imaging pixels P ₃₁ to P ₃₃ . In this case, data r ₃₁ -r ₇₃ of shift register 505 are stored in subsequent stage shift registers 1011 - 1013 as data r ₃₁ ' - r ₇₃ ' in response to input of clock signal CLK1. As a result, the conversion table 1020~
From 1022, blur signals for the imaging pixels P ₃₁ to P ₃₃ are output.

As is clear from the above description, the blur signals corresponding to the respective color imaging signals are outputted in real time at high speed in synchronization with the generation of the clock signal CLK1. Further, since the calculation section performs filtering by optical filtering 701 and table conversion 1014 to 1016, a complicated circuit for the product-sum calculation is not required, and the circuit configuration is simple and can be provided at low cost.

In addition, when creating a blur signal with 5 × 5 pixels,
Since there is a delay of 5 pixels in creating the blur signal, if the imaging signal is delayed by 5 pixels in advance using the shift register 504, the imaging signal and the blur signal of that pixel point can be obtained at the same time.

Furthermore, the present invention can be implemented with an optical system having a configuration as shown in FIG. 4B. In this case, if the longitudinal dimension of each long sensor in the blur signal forming sensor group 410 is, for example, 62.5 μm x 13 = 812.5 μm, then the distance between the blur signal forming sensor group 410 and the imaging sensor group 409 is The width should be about 1mm, so
Both sensor groups 409, 4 with one imaging lens 405
10 can be simultaneously formed with optical images.
However, since both sensor groups 409 and 410 do not image the same image point of the document, the imaging sensor group 40
In order to extract the blurred signal corresponding to the imaged point on 9 at the same time as the imaged signal, a buffer memory for timing adjustment is required. This timing adjustment can be easily performed using known techniques.

Furthermore, in the embodiment of the present invention, a variable transmission density filter (grating filter) and a color separation filter are provided separately, and the two filters are stacked on top of each other, but the configuration is not limited to this. A single filter having density variations in three colors of red, edge, and blue may also be attached to the blur signal forming sensor group.

As explained above, according to the embodiments of the present invention,
The blur signal forming sensor group is provided separately from the imaging sensor group, and the light-receiving area of the former sensor group is made larger than that of the latter sensor group, so there is no need for a buffer memory to store image signals to form blur signals. There is no need for sensor scanning to send signals, making it easier to control scanning and the like. Also, since the buffer memory is exhausted like this,
Memory access to the buffer memory is eliminated, and the image data for creating the blur signal can be continuously passed to the subsequent circuit for arithmetic processing, making the overall processing speed extremely fast.

Furthermore, in the embodiment of the present invention, one-dimensional filtering is performed by optical filtering, so
Since only the remaining one-dimensional filtering needs to be processed, the time loss required for the calculation is extremely small. Therefore, according to the embodiments of the present invention, an imaging signal and a blur signal can be obtained simultaneously at high speed even by using a sensor group (sensor array) such as a CCD, and can be provided at low cost with a simple configuration. can.

[Effects of the Invention] As described above, according to the present invention, a color document is transferred to a first sensor array in which a plurality of photoelectric conversion elements each having a plurality of color separation filters periodically attached thereto are arranged in an array. Along with forming an image,
A second sensor array includes a plurality of photoelectric conversion elements arranged in an array, each having a larger area than the photoelectric conversion elements constituting the first sensor array, and having color separation filters of multiple colors attached periodically. a document image area imaged on one sensor array, and
Since a document image area wider than the document image area is imaged, this allows the reading position of the first sensor array, which outputs color image signals of multiple colors representing the color document image, and the blur image signal formation for each color. Since the reading positions of the second sensor array that outputs blurred image forming signals of multiple colors always match, taking into account the amount of deviation of these reading positions and the reading scanning speed,
Color image signals of multiple colors and blurred image forming signals of multiple colors at the same position on a color original image can be obtained without using a complicated circuit configuration for electrical alignment.

Further, according to the present invention, a blur image signal is formed for each color by calculating the blur image formation signals of a plurality of colors output from the second sensor array, and By delaying the output color image signals of multiple colors for each color, the multiple color image signals are output for each color in synchronization with the blurred image signals of each color. Since it is possible to always obtain multiple color image signals corresponding to the blurred image signals for each color obtained by calculating the image forming signal for each color, it is possible to obtain multiple color image signals and process them for each color. Blurred image signals for each necessary color can be obtained almost simultaneously.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of the configuration of a conventional device;
The figure is a perspective view showing a configuration example of a copying machine to which the present invention can be applied, FIGS. 3A and 3B are plan views illustrating the manner in which a blur signal is created using the conventional method, and FIGS. 4A and B
5, 7 and 8 respectively show the relationship between the arrangement configuration of each sensor group and the filter characteristics shown in FIG. 4. 6A to 6C are explanatory diagrams showing examples of filtering coefficients according to the present invention, FIG. 9 is an exploded perspective view illustrating the state of connection between the sensor section and the filter of the device of the present invention, and FIG. FIG. 7 is a block diagram showing an example of the configuration of a circuit according to the present invention connected to the sensor section, and FIGS. 11 and 12 are operations for explaining the operation when obtaining a blur signal using the circuit shown in FIG. FIG. 201...reading head, 202...recording head, 203...manuscript, 204...recording paper, 209
. . . Data creation unit, 301 .
Imaging lens, 406...Half mirror, 409...
...Image formation sensor group, 410...Blurred signal forming sensor group, 411...Substrate, 504, 505...Shift register, 701...Variable transmission density filter, 9
02,903...Color separation filter, 904...
ND filter, 1009, 1010...Digital switch, 1011-1013...Shift register, 1014-1016...Conversion table, 10
17-1019...Adder, 1020-1022
...Conversion table, CLK1...Clock signal.

Claims (1)

[Claims] 1. A plurality of photoelectric conversion elements to which color separation filters of a plurality of colors are periodically attached are arranged in an array,
a first sensor array that outputs color image signals of a plurality of colors representing a color original image; and a color separation filter of a plurality of colors that is larger in area than the photoelectric conversion element constituting the first sensor array and periodically arranged in a plurality of colors. a second sensor array in which a plurality of photoelectric conversion elements attached to the sensor array are arranged in an array and output a plurality of color blur image formation signals for forming a blur image signal for each color; Imaging a document image area that includes the document image area imaged on the first sensor array and that is wider than the document image area on the second sensor array. By calculating the plurality of color blurred image forming signals outputted from the optical system and the second sensor array for each color, the blurred image signal corresponding to the document image area read by the first sensor array is colored. by delaying the color image document of multiple colors outputted from the first sensor array for each color;
An image input device comprising: a delay means for outputting color image signals of a plurality of colors representing a color original image for each color in synchronization with the blurred image signal for each color outputted from the calculation means.