JP3178533B2 - Control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a control method. [Related Art] In recent years, the reproducibility of a read image has been improved with the development of an image processing apparatus. For this reason, a technique for preventing image formation of a specific image, such as a bill, for which image formation is prohibited is required. Therefore, in a conventional apparatus, it is determined whether or not a processing target image is a specific image by extracting a predetermined color using a plurality of color component signals and performing feature matching.

[Problems to be Solved by the Invention] However, in the conventional apparatus, a specific image is determined by treating a plurality of color component signals equally.

The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a control method capable of improving the accuracy of determining a specific image with a simple configuration.

[Means for Solving the Problems] In order to solve the above-mentioned problems, a control method of the present invention provides a color image processing apparatus which processes an input multi-color component signal and outputs a signal for color image reproduction. A control method for outputting a control signal for preventing a faithful reproduction of the image when the image represented by the multi-color component signal is a specific image, the control method comprising: Using one of the color component signals, a predetermined image portion that is a line drawing area on an image corresponding to the plurality of color component signals is determined, and the plurality of color component signals are used to determine a predetermined image portion. Determining whether or not the image has a specific color, and determining the similarity between the image corresponding to the multi-color component signal and the specific image based on the determination result of the predetermined image portion and the determination result of the specific color. According to the similarity determination result. And outputting the control signal.

According to a further preferred embodiment, in the step of determining whether or not the image has the specific color, in the step of determining the predetermined image, a portion determined as the predetermined image in the step of determining whether or not the specific image has the specific color Is determined.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 to 12 used in the following description are diagrams for explaining an embodiment of the present invention, and FIG. 5B is a diagram for explaining a comparison with the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following embodiments, a copying apparatus is shown as an application example of the present invention. However, it is a matter of course that the present invention is not limited to this and can be applied to various other apparatuses such as a printer.
In the following description, bills, gift certificates, securities, and the like will be referred to as specific documents.

<First Embodiment> FIG. 1 shows an external view of an apparatus according to a first embodiment of the present invention. In the figure, 201 is an image scanner section,
This is a part for reading a document and performing digital signal processing.
Reference numeral 202 denotes a printer unit, and an image scanner unit 201.
This section prints out an image corresponding to the original image read in full color on paper. Image scanner
In 201, reference numeral 200 denotes a mirror pressure plate, and a document 204 on a platen glass (hereinafter, a platen) 203 is irradiated by a lamp 205, guided to mirrors 206, 207, and 208, and imaged on a three-line sensor (hereinafter, a CCD) 210 by a lens 209. And sent to the signal processing unit 211 as full-color information red (R), green (G), and blue (B) components. Note that 206, 206 is the speed v
Reference numerals 207 and 208 scan the entire surface of the document by mechanically moving at 1 / 2v in a direction perpendicular to the electrical scanning direction of the line sensor. The signal processor 211 electrically processes the read signal, decomposes it into magenta (M), cyan (C), yellow (Y), and black (Bk) components.
Send to 202. In addition, for one original scan (scanner) in the image scanner unit 201, one component of M, C, Y, and Bk is sent to the printer unit 202, and one full color print is performed by a total of four original scans. Is completed.

M, C, Y or sent from the image scanner 201
The Bk image signal is sent to the laser driver 212. The laser driver 212 modulates and drives the semiconductor laser 213 according to the image signal. The laser beam is applied to the polygon mirror 214, f-θ lens 21
5. Scan the photosensitive drum 217 via the mirror 216. 218
Denotes a rotary developing unit, which includes a magenta developing unit 219 and a cyan developing unit.
The developing unit includes a developing unit 220, a yellow developing unit 221, and a black developing unit 222. The four developing units alternately contact the photosensitive drum 217 and develop the electrostatic latent image formed on the photosensitive drum 217 with toner. Reference numeral 223 denotes a transfer drum, which winds the paper fed from the paper cassette 224 or 225 around the transfer drum 223,
The image developed on the photosensitive drum 217 is transferred to a sheet.

After the four colors M, C, Y, and Bk are sequentially transferred in this manner, the sheet passes through the fixing unit 226 and is discharged.

FIG. 2 is a block diagram for explaining the configuration of the signal processing unit (image processing unit) 211 shown in FIG. 1, and the same units as those in FIG. 1 are denoted by the same reference numerals.

In FIG. 2, CLK is a clock signal for transferring pixels, HSYNC is a horizontal synchronizing signal, and is a synchronizing signal for starting main scanning. A control unit 401 is a CPU for controlling the entire apparatus, a ROM storing an operation program, a RAM having a work area for the program, a CLK (clock signal for transferring pixels), and an HSYNC (start of main scanning). Sync signal)
And a circuit that generates Reference numeral 402 denotes a color signal processing unit which generates a print signal from the input R, G, and B signals and sends it to the printer unit 202. 403 is a specific document determination unit,
An image scanner section composed of a circuit shown in FIG.
Based on the color signals R, G, B obtained by reading the original in 201, it is determined whether or not the registered specific original is included,
The determination result is notified to the color signal processing unit 402.

INH 404 is a determination signal determined by the specific document determination unit 403, and is set to 0 (low) at the start of document reading, and is set to 1 (high) when it is determined that the document is a specific document.
Reference numeral 202 denotes a printer unit. When the INH404 signal is 0, a normal copying operation is performed. When the signal is 1, the subsequent image forming operation is interrupted and the copy sheet is discharged.

FIG. 3 is a diagram showing relative sensitivities of CCD (R) 301, CCD (G) 302 and CCD (B) 303 according to the wavelength of light.

FIG. 4 is a block diagram for explaining the configuration of the image scanner unit 201 shown in FIG. 1. Reference numeral 101 denotes a counter, which is a line sensor 3 constituting the three-line sensor 210.
Main scanning address 1 that specifies the main scanning position for 01 to 303
Outputs 02. That is, the horizontal synchronization signal HSYNC is "1".
At this time, it is set to a predetermined value by a CPU (not shown),
It is incremented by the clock signal CLK of the pixel.

The image formed on the three-line sensor 210 is photoelectrically converted by three line sensors 301 to 303, and each of the three
Component, G component, B component
6, sample and hold circuits 307 to 309 and A / D converter 310 to
The digital image signal 313 (corresponding to R), digital image signal 314 (corresponding to G), and digital image signal 315 (corresponding to digital image signal 315 (B)) of each color are output through 312.

FIG. 5 is a block diagram showing the configuration of the specific original discriminating unit 403 shown in FIG. 2, FIG. 8 is a view for explaining the specific original discriminating method according to the first embodiment, and FIGS. 9A and 9B are FIG. 10 illustrates the relationship between the specific document and the color space, FIG. 10 illustrates the relationship between the color space data of the specific document and the data in the determination ROM 501, and FIG. 11 illustrates the positional relationship between the specific document and the recognition area. FIG.

In FIG. 5, a determination ROM 501 is composed of a read-only memory having a data width of 8 bits and an address width of 15 bits, and stores data corresponding to eight types of specific originals.

The R, G, B color image signal input by the image scanner unit 201 is input as an address signal of the determination ROM 501. The determination ROM 501 is written with information on whether or not the image data of the specific document shown in FIGS. 9A, 9B, and 10 exists in the corresponding R, G, B spaces. Input color signal 313,314,315
Are the specific originals A and B in the oblique portion in the RGB space shown in FIGS. 9A and 9B.
1 is the output signal of the determination ROM 501 when the image portions match, and 0 otherwise is the output signal.

The determination information output from the determination ROM 501 is input to the integrators 5011 to 5018 via the latch circuit 502.

Since the integrators 5011 to 5018 have the same configuration, the integrator 5011
Will be described as an example.

 FIG. 6 is a block diagram illustrating the integrator 5011.

In FIG. 6, 601 and 602 are multipliers, 603 is an adder, 60
4 is a latch circuit for timing adjustment. Multiplier 6
In 02, the input i-th signal x _i (0 or 1)
, Using a predetermined weighting coefficient β, x _i × 255
The multiplication (1-β) is performed and input to the B side of the adder 603. On the other hand, the output from the latch circuit 604 (i-
1) The multiplier 601 applies y to the _first output signal y _i-1
The multiplication of _i−1 × β is performed and input to the A side of the adder 603. In the adder 603, x _i × 255 (1-β) + y _i-1
The addition of × β is performed, and the calculation result is output as y _i . That is, the integrator 5011 is a circuit that performs integration of y _i = x _i × 255 (1−β) + y _i−1 × β on all input data.

By executing the above calculation, when the input value 1 to the integrator 5011 is continuous as shown in FIG. 7B, the output value from the integrator 5011 approaches 255 as shown in FIG. 7A. When the input value 0 continues, the output value approaches 0.

Since the comparison arithmetic units 5001 to 5008 have the same configuration, if the comparison arithmetic unit 5001 is described as an example, the magnitude of the output value A from the integrator 5011 and the predetermined constant value B stored in the register 5021 is determined, and C And outputs a determination signal indicated by. That is, according to the equation (1), C ₁ = 1: A ₁ > B ₁ C ₁ = 0: A ₁ ≦ B ₁ (1) According to the above processing, the input color signal is converted into the image data of the specific original. , The comparison operator
Output C ₁ from 5001 is one. Note that the comparison calculators 5002 to 50
08, registers 5022-5028 function similarly.

The counters 521 to 528 have the same configuration.
Is a counter the output C ₁ counts up-only one. This counter 521 calculates the number of pixels included in the specific document recognition area indicated by the hatched portion in FIG.

The OR write circuit 511 is a circuit that performs an OR write of the output signals C _{1 to} C ₈ of the comparators 5001 to 5008 to the RAM 512. Also
RAM512 has a bit width of 8 bits of the same size as the judgment ROM 501,
This is a RAM with an address width of 16 bits.

By measuring the number of bits of the determination result "1" stored in the RAM 512, the R, G,
The volume in the B space is calculated.

Reference numeral 515 denotes a CPU that controls the entire specific document determination unit 403. CPU 515 is mainly composed of counters 521 to 528 and RAM 512
Is read, and it is determined whether or not the target document exists in the input document.

Input of the integrator of Figure 6 is X _i, the output is represented by Y _i (1
≤ i ≤ 8). As processing, an operation according to the following equation (2) is performed.

Y _{i + 1} = β · Y ₁ +255 (1−β) X _i (2) In the above equation (2), β is a constant for controlling the integration effect of the integrator. In the range of 0 <β <1, the following relationship is established.

That is, the integral value change curve changes gradually as the set value of β shown in FIG. 7B approaches 1, and changes rapidly when the set value of β approaches 0. In the first embodiment,
β = 31/32.

Although it is assumed that the recognition target is a manuscript of the size of a banknote, if a smaller manuscript image, such as a stamp, is to be recognized, β is a smaller value, for example, β = 7/8. Is appropriate. The value of β depends on the recognition target,
Arbitrary settings may be made by a scanning unit (not shown).

FIG. 12 is a flowchart for explaining the operation of the CPU of the first embodiment.

First, when the information of the document reading start is detected, S1201
At the start of document reading, the INH404 signal is set to 0. Thereafter, in S1202, an original reading instruction is issued. In S1202, 1 is set to a variable n. That is,
The counter value of the n-th counter is sequentially stored in the RAM 512. In S1204, the counter of FIG. 5, in this case, n
= 1, the value of the counter 521 is read, and the value is
2 Stored in the variable area set above.

In S1205, the total number of 1s stored in the variable area of the RAM 512 in FIG. 5 is calculated, and this value is set in the variable vol.

Here, the variable vol is a value indicating the volume of the hatched portion in FIG. 8, that is, vol = Tjd.

In S1206, it is determined whether the value of the variable area exceeds a predetermined constant K.

The value of the variable area corresponds to the number of pixels in the recognition area indicated by the hatched portion in FIG. Therefore, by comparing the value of the variable area with the constant K to determine the magnitude, the possibility that the document is a bill document is determined.
Nothing is determined. That is, it is determined that there is a possibility that the document is a bill document when the variable area> K.

In step S1027, the similarity r between the value of the variable vol set in step S1205, the observed image data in the color space represented by the following equation (3), and the image data of the specific document is calculated and compared with a constant β.

In FIG. 8, T _ORG is image data of a specific document registered in advance (hereinafter referred to as specific image data), and R, G, B
Corresponding to the perspective part displayed in space, the volume between the R, G, B coordinates is shown. Tjd is image data of the read original (hereinafter referred to as observation image data), and the observation image data in which the output signal of the comparison / determination units 5001 to 5008 is 1 is R,
Corresponding to the hatched portion displayed in the G, B space, the volume is shown in the R, G, B coordinate space. When the similarity r at this time is expressed by the following equation (3), Becomes The closer the value of the similarity r is to 1, the higher the similarity between the observed image data and the specific image data.

Here, by Vol = Tjd, (Gamma, that is, γ is a constant determined by experiment and indicates a matching ratio in a color space: γ = 0.7). If true, the similarity between the observed image data and the specific image data Is high, and it is determined that copying should be prohibited.

The specific document determination circuit 403 described above determines whether or not image data of a specific document registered in the input image signal is included based on the input signals R, G, and B. INH 404 is a determination signal determined by the specific document determination unit 403, and is set to 0 at the start of document reading, set to 1 if it is determined to be a specific document, and set to 0 otherwise. It should be noted that, for example, by providing a plurality of threshold values of the above formula (4), it is also determined that the input image may be a specific document, and if it is determined that there is a possibility, 2 may be set. Good.

When the INH404 signal is 0, a normal output signal is sent to the printer unit 202, and the printer unit 202 also performs a normal copy operation. When the INH404 signal is 1, along with the output signal,
The INH404 signal is sent to the printer unit 202, and the subsequent image forming operation is interrupted, and the copy sheet is discharged. In addition, when the INH404 signal becomes 2 in consideration of the possibility as described above, appropriate smoothing is applied to the output Y, M, C, and K signals, and the difference between the original and the copy becomes apparent. The data may be sent to the printer unit 202 as data to be blurred to the extent that it is changed.

If there is a possibility that a specific document is included, n types (2 to n) of INH404 signals are generated based on the similarity and sent to the color signal processing unit 402, and there is a possibility that the specific document is present according to the INH404 signal. The higher the is, the more the amount of blur can be increased.

If the specific document clearly exists, a solid black image may be output.

As described above, according to the present embodiment, since a plurality of specific documents are determined, high-speed determination is possible. For example, in a prescan, the determination can be made in real time.

Further, according to the present embodiment, by changing the processing based on the multi-value determination result based on the determination level, it is possible to obtain an effect of eliminating erroneous determination when a suspicious document is input as an original image.

FIG. 13 is a block diagram showing a circuit configuration of the specific original discriminating unit 403 according to the embodiment of the present invention for solving the above-mentioned problem.

In the figure, reference numeral 1301 denotes an identification circuit for identifying a flat area and a line drawing area of a document image input in real time.
Reference numeral 1302 denotes a ROM (Read Only Memory) that stores the color data of the background portion of the specific document, and stores data for performing matching in the color space shown in FIG. 21A. FIG. 21B shows the configuration of ROM 1302. If the color of the flat portion of the specific document exists in the RGB space, 1 is written. Otherwise, 0 is written. R, G, B upper 5 bit signals of the input document are input to the address line of ROM1302,
If the R, G, B signals match the color data of the background portion of the specific document, 1 is output as the flat portion color matching signal 1315 otherwise 0 is output. The ROM 1321 is a ROM in which color data of a line drawing portion of a specific document is stored, and stores data for performing matching in a color space shown in FIG. When the R, G, B signals of the input original match the color data of the line drawing part of the specific original 1
Otherwise, 0 is the line drawing color matching signal 13
Output as 16.

The output matching signals 1351 and 1316 are input to eight sets (colored originals of eight types are determined in parallel) of color matching units. Since the determination circuits 1 to 8 have the same configuration, the determination circuit 1 will be described as an example.

An integrator 1303 performs an integration process of a flat portion color matching signal relating to the background of the specific document. Here, FIG. 15 shows an integration coefficient of the integrator 1303, and FIG. 17 shows a circuit configuration of the integrator 1303.

17, reference numeral 1303-1 denotes a ROM for generating the coefficient β shown in FIG. 6 described above. The coefficient β shown in the table of FIG. 15 is obtained by using the painting area signal 1314 and the flat area signal 1313 as address input signals. ₁ , β ₂ , 1 (provided that 0 <β ₂ <β ₁ <1)
Select one of and output. 1303-2 is the sixth
It is assumed that the input signal x _i × 255 (1−β) [= ε of the adder in the figure. A ROM that generates the coefficient ε ₁ shown in the table of FIG. 15 using the picture area signal 1314, the flat area signal 1313, and the flat color matching signal 1315 as address input signals.
Select and output either ε ₂ , 0. 1303-3 is a multiplier 1303-4 and adder 1303-5 is a latch circuit.

The flat region signal is obtained by the integration operation processing by the integrator 1303.
When 1313 is true (= 1), the flat part color matching signal 13
If the value of 15 is 1 continuously, the value of the background integration signal 1317 is 25
When the value approaches 5 and the value of the flat tint matching signal 1315 continues to be 0, the value of the background integration signal 1317 approaches 0.

Reference numeral 1306 denotes an integration processing circuit for the line drawing color tint matching signal 1316.

Here, FIG. 16 shows the integration coefficient of the integrator 1306, and FIG.
The figure is a block diagram showing the circuit configuration of the integrator 1306. No.
The configuration of the integration circuit shown in FIG. 18 is substantially the same as that of FIG. 17, and performs an integration operation using predetermined coefficients shown in FIG.

By the integration operation of the integration circuit 1306, when the background determination signal 1318 is 1, that is, in the vicinity of the flat region of the input document having the same color as the background of the specific document, the same color as the line drawing portion of the specific document is obtained. When the line image portion has the continuous line image portion, the line image integration signal 1319 approaches 255, and otherwise approaches 0.

 FIG. 14 is a diagram conceptually explaining FIG.

In FIG. 14, reference numeral 1302 denotes a flat portion tint template storing tint information of a flat portion of a specific document serving as a reference for matching, and 1321 denotes a line drawing tint template storing tint information of a line drawing portion of the specific document. Each of them is configured by a ROM.

In each of them, the tint information of the background portion and the tint information of the line drawing portion of the specific document extracted in advance are set as color distribution information in the color space by the template information creating section 2003.

Further, the template information creating unit 2003 is configured by a CPU, thereby extracting the color distribution information on the color space of the specific document when the specific document is read from the reader unit, and configured by the RAM. By adopting a configuration in which the information is written in 1302 and 1321, it is also possible to create the color distribution information of a specific document to be prohibited from being copied by the system itself and set it in 1302 and 1321.

Based on the region signals 1313 and 1314 detected by the region detection unit 1301, the flat portion tint matching 2000 and the line drawing portion tint matching 2001 perform the tint matching process (described above) for each of the flat portion and the line drawing portion. . The line drawing portion tint matching 2001 operates so that the line drawing portion and the integral signal 1319 increase only when the background determination signal 1318 is true (= 1).

The determination signal 1322 determines that the document is a specific document only when the determination signals from the pixel number determination unit 2002 and the volume ratio determination unit 1311 are both true (= 1).

FIG. 19 is a diagram conceptually showing the processing described in FIG. 14 in an RGB color space.

Matching processing of the color of the background portion (flat portion of the image signal) is performed using the observed image (input color signal) and the background data registered in the ROM 1302, and the background determination signal 1318 is true (= 1).
Only in the case of, processing is performed so that the line drawing portion and the integral signal 1319 increase.

That is, the determination signal 1320 is true (= 1) only when a line image of a specific color exists inside the background portion of the special color.
Becomes

(Description of Region Detector 1301) FIG. 20A is a block diagram illustrating the configuration of the region detector 1301, and FIG. 20B is a diagram illustrating the operation of the region detector 1301 in FIG. FIG. 23 is a view for explaining an image pattern in which the edge amount OUT is calculated to be large.

20A, reference numerals 81 and 82 denote line buffers for delaying one line of pixels, reference numeral 83 denotes an edge amount calculation circuit for calculating the edge amount of the present embodiment, and reference numerals 86 and 87 denote edge amount calculation circuits 83, respectively. And comparators 84 and 85, respectively, for storing constants given to the comparators 86 and 87. Register 8
The constant stored in 4,85 may be a value given from another configuration. In this case, the registers 84,85 can be omitted.

Here, FIG. 20C is a block diagram of the edge calculation circuit 83, and shows the input data line delayed by the line buffer.
Pixel data from X, Y, Z is 3 × 3 by 9 latch circuits.
Is delayed to form a window. On the contrary,
The calculation shown in FIG. 20B is performed, and an edge amount signal out is output.

It is calculated from a 3 × 3 pixel matrix centered on the target pixel. The value of OUT shown in FIG. 20 is particularly large in the case of a linear pattern as shown in FIG. Most non-copiable specific manuscripts represented by banknotes are mostly composed of line drawings and background. Therefore, the circuit configuration can effectively detect the shape existing in the document, that is, the linear portion.

(Explanation of Volume Ratio Judgment Circuit) FIG. 24 is a block diagram showing a circuit for explaining the volume ratio judgment circuit 1311 in FIG. 13. FIG. 25 is a block diagram showing the color matching process of R, G, B of the line drawing part. It is a conceptual diagram explaining in a color space.

In the figure, in the OR write circuit 2401, when the line drawing determination signal 1320 is 1 and the corresponding bit of the RAM 2402 is 0, 1 is written to the corresponding bit of the RAM 2402 and the counter 2404 is incremented by 1.

If the above conditions are not satisfied, the OR write circuit
2404 and RAM2402 are not operated. Reset 2403
Is a circuit for clearing the RAM 2402 and the counter 2404 to 0, and operates when the read section signal Vsync changes from High to Low.

The value of the counter 2404 corresponds to the value of Ujd shown in FIG. 25, and a volume ratio determination signal 1323 is generated by performing a magnitude comparison with the threshold 2405.

As described above, the data relating to the tint of the background portion of the specific document and the tint of the line drawing portion are registered in advance, the flat region and the line drawing region of the input document image are identified in real time, and By comparing and comparing the color data with color data registered in advance, a specific document can be identified more accurately.

<Second Embodiment> FIG. 26 is a block diagram showing a circuit configuration of a second embodiment of the present invention, FIG. 27 is a diagram for explaining an integration coefficient of a line drawing color integrator 2602, and FIG. The figure is a block diagram showing the configuration of the line drawing part color integrator 2602.

In the first embodiment described above, the background determination signal 1318
Is true (= 1), the value of the line drawing integration signal 1319 increases.

In the second embodiment, the calculation of the matching degree of the color of the line drawing portion is performed in parallel with the calculation of the matching degree of the color of the flat portion, and the determination is made based on both matching signals.

26, a flat color separation integrator 2601 performs the same processing as that of the integrator 1-1303 in FIG. 13, and is a multi-valued (0-255) background integration signal indicating the matching degree of the color of the flat portion. 230
Calculate 6. The line drawing part color integrator performs the arithmetic processing shown in FIGS. 27 and 28A to generate a line drawing integration signal 2307.

FIG. 28B is a diagram illustrating the configuration of the dotted line portion in FIG. 28A. The operation of each part is almost the same as in the first embodiment, and a description thereof will be omitted.

By generating the determination signal from the background integration signal 2306 and the line drawing integration signal 2307, the determination signal can be generated more stably with respect to a change in tint due to a secular change or the like of a banknote.

Although the first and second embodiments focus on forgery of banknotes, the present invention is not limited to this, and specific manuscripts that have a bad influence on society, such as securities, may be used. Everything can be targeted.

It is also effective for a color image search device such as a design image filling system.

Further, the above-described image area separation method can be replaced with another known method.

[Effects of the Invention] As described above, according to the present invention, a predetermined image portion on an image is determined using one color signal of a plurality of color component signals, so that the apparatus configuration is not significantly increased. The predetermined image portion can be used for determination of a specific image. In addition, since a configuration is also provided for determining whether or not an image corresponding to the plurality of color component signals has a specific color, determination accuracy can be improved.

That is, according to the present invention, the accuracy of determining a specific image can be improved with a simple configuration.

[Brief description of the drawings]

FIG. 1 is an external view showing an image processing apparatus of the present invention, FIG. 2 is a block diagram showing the configuration of a signal processing unit 211, FIG. 3 is a diagram showing relative sensitivity according to the wavelength of light of the CCD 210, FIG. FIG. 5 is a diagram for explaining the configuration of the image scanner unit 201, FIG. 5 is a block diagram showing the circuit configuration of the specific original discriminating unit 403, FIG. 6 is a block diagram showing the configuration of the integrators 5011 to 5018, FIG. Is a diagram illustrating the integration effect, FIG. 8 is a diagram illustrating the integration value change curve, FIG. 9 is a diagram illustrating the relationship with the color space of the specific document, and FIG. 10 is determined as the color space data of the specific document. FIG. 11 is a diagram showing the relationship between the data of the ROM 501, FIG. 11 is a diagram showing the positional relationship between the specific document and the identification area, FIG. 12 is a flowchart illustrating the similarity determination operation of the present invention, and FIG. FIG. 14 is a block diagram showing a first embodiment of the image processing apparatus according to the present invention. FIG. 14 conceptually illustrates the configuration of FIG. FIG. 15 is a diagram showing the integration coefficient of the integrator 1303, FIG. 16 is a diagram showing the integration coefficient of the integrator 1306, FIG. 17 is a diagram showing the circuit configuration of the integrator 1303, and FIG. FIG. 19 is a diagram showing the circuit configuration of the device 1306. FIG. 19 is a conceptual diagram illustrating the processing by the circuit shown in FIG. 13 in the R, G, B color space. FIG. 20A describes the configuration of the area detection circuit 1301. A block diagram, FIG. 20B is a diagram for explaining the operation of the area detection circuit 1301 in FIG. 13, FIG. 20C is a block diagram showing a configuration of the edge calculation circuit 83, and FIG. 21A is a color space data of the background portion of the specific document. Judgment ROM13
FIG. 21B is a block diagram showing the configuration of the ROM 1302, and FIG. 22 is a block diagram showing the color space data of the line drawing portion of the specific document and the determination ROM 132.
FIG. 23 is a diagram for explaining the relationship with the data of FIG. 1, FIG. 23 is a diagram for explaining an image pattern in which the edge amount OUT is calculated to be large, and FIG. 24 is a block diagram showing a circuit for explaining the volume ratio determination circuit 1311 in FIG. FIG. 25 is a conceptual diagram for explaining the color matching processing of the line drawing section in the R, G, B color space. FIG. 26 is a block diagram showing the circuit configuration of the second embodiment of the present invention. FIG. 28 is a diagram for explaining the integration coefficient of the line drawing portion tint integrator 2602. FIG. 28A is a block diagram showing the configuration of the line drawing portion tint integrator 2602. FIG. 28B is a diagram illustrating the configuration of the dotted line portion in FIG. 28A. In the figure, 1 to 8: determination circuit 101: address counter 200: mirror pressure plate 201: image scanner unit 20,
2 Printer section 203 Platen 204 Manuscript 205
…… Lamp, 206,207,208 …… Mirror, 209 …… Lens,
210 ... 3 line sensor, 211 ... signal processing unit, 212 ...
Laser driver, 213 semiconductor laser, 214 polygon mirror, 215 f-θ lens, 216 mirror, 217
...... photosensitive drum, 218 rotary developing unit, 219 magenta developing unit, 220 cyan developing unit, 221 yellow developing unit, 222 black developing unit, 223 transfer drum, 224,
225: Paper cassette, 226: Fixing unit, 301-303
…… CCD, 304-306 …… AMP, 307-309 …… SH, 310-31
2 A / D, 313 to 315 Digital image signal, 401 Control unit, 402 Color signal processing unit, 403 Specific document determination unit, 40
4 INH, 406 Copy output, 501 Judgment ROM, 502
... Latch circuit, 511 ... OR write circuit, 512 ... RAM, 5
13,514…, 515 …… Microprocessor, 521,528 …… Counter, 5001,5008 …… Comparator, 5011,5018 …… Integrator,
5021, 5028, 2405 ... Register, 1301 Identification circuit, 130
2,1321… ROM, 1303,1306 …… Integrators, 1304,1307,1312
… Comparator, 1305, 1308, 1310… Register, 1309… Integration counter, 1311… Volume ratio judgment circuit, 1330 …… AND circuit, 1331 …… OR circuit, 2401 …… OR writing circuit, 2402…
… RAM, 2403 …… Reset, 2404 …… Counter, 2506,26
04: comparator, 2601 ... flat part color integrator, 2602 ... line drawing part color integrator, 2603 ... multiplier, 2605 ... pixel number determination circuit.

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masahiro Funada 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (56) References JP-A-2-284189 (JP, A) JP-A-2 −210591 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/40-1/409 H04N 1/46 H04N 1/60

Claims (2)

(57) [Claims] An image represented by said plurality of color component signals is a specific image in order to control a color image processing apparatus which processes an input plurality of color component signals and outputs a signal for color image reproduction. A control method for outputting a control signal for preventing faithful reproduction of the image, the method comprising: using one color component signal of the plurality of color component signals to generate an image corresponding to the plurality of color component signals. Determining a predetermined image portion that is an upper line drawing region; using the multiple color component signals to determine whether an image corresponding to the multiple color component signals has a specific color; and determining the predetermined image portion. And determining a similarity between the image corresponding to the plurality of color component signals and the specific image based on the determination result of the specific color and outputting the control signal according to the determination result of the similarity. Control method. 2. The step of judging whether or not the image has the specific color includes judging whether or not the portion judged as the predetermined image in the step of judging the predetermined image has the specific color. The control method according to claim 1, wherein: