JP3293844B2 - Image processing apparatus and method - 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 processing apparatus for adding information for specifying a device to a document image and a method thereof.

[0002]

2. Description of the Related Art With the increase in image quality and colorization of copiers, specific documents such as securities and banknotes, which should not be copied, are
It is copied in high image quality that is almost indistinguishable from the actual product, and there is a risk of misuse. Further, it is almost impossible to specify the device used for copying or the person who made the copy from the copy.

Therefore, when an original that should not be copied is copied, especially when the copy is misused, it is important to identify the copying machine used for copying or the person who made the copy. Become.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to add information for specifying a device to a document image. Still another object of the present invention is to obtain information for specifying the apparatus by effectively using a reading unit for reading a document image.

[0005]

The present invention has the following arrangement as one means for achieving the above object. An image processing apparatus according to the present invention includes a reading unit for reading a document image, and a storage unit that stores an image that is recorded at a specific location of the reading unit and that is read by the reading unit and that specifies an apparatus. An adding unit that adds an image stored in the storage unit to a document image read by the reading unit, and outputs an image obtained by adding an image for specifying the device; and an output unit that outputs the image. Forming means for forming an image by using a recording agent of a plurality of colors,
The adding unit may be configured to form the image on the original image such that an image for specifying the apparatus is formed using a recording material of a color that is difficult to be recognized by human eyes among the recording materials of the plurality of colors. The method is characterized in that an image for specifying is added.

An image processing method according to the present invention is characterized in that an image for specifying an apparatus, which is recorded at a specific location of a reading means for reading a document image and which is read by the reading means, is stored in a memory. The image stored in the memory is added to the document image read by the reading unit, and an image to which the image for specifying the device is added is output, and the image for specifying the device is added. Each step of forming an image using a recording material of a plurality of colors is used, and an image for specifying the apparatus uses a recording material of a color that is difficult to be recognized by human eyes among the recording materials of the plurality of colors. An image for specifying the device is added to the document image so that the image is formed by the image forming apparatus.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment according to the present invention will be described below in detail with reference to the accompanying drawings. In the following embodiments, an example of a copying machine will be described as an application example of the present invention, but the present invention is not limited to this, and it is needless to say that the present invention can be applied to various other apparatuses. Further, in each device applicable to the present invention, specific manuscripts such as banknotes, securities, confidential documents, etc. are targeted for forgery prevention.

[0008]

FIG. 2 is a side sectional view showing the structure of a copying machine according to a first embodiment of the present invention. In FIG. 2, reference numeral 201 denotes an image scanner which reads a document image at a resolution of 400 dpi (dots / inch) and performs digital signal processing. Reference numeral 202 denotes a printer unit which outputs a full-color printout of an image corresponding to the document image read by the image scanner unit 201 on paper at a resolution of 400 dpi.

In the image scanner section 201, 20
Reference numeral 0 denotes a mirror pressure plate, and a platen glass (hereinafter, platen)
An original 204 on the original 203 is irradiated by a lamp 205, guided to mirrors 206, 207, and 208, formed an image on a three-line sensor (hereinafter, referred to as a CCD) 210 by a lens 209, and becomes a full-color information red (R). , Green (G) and blue (B) components to the signal processing unit 211. Note that a carriage 226 fixing the 205 and 206 is at a speed v, and 207 and 208 are mechanically moved at a speed of 1/2 v in a direction perpendicular to the electrical scanning (main scanning) direction of the line sensor. Then, the entire surface of the document is scanned (sub-scan).

In a signal processing section 211, the read image signal is electrically processed, decomposed into respective components of magenta (M), cyan (C), yellow (Y) and black (Bk). Send to 202. Further, M, C,
One component of Y and Bk is sent to the printer unit 202, and one printout is completed by a total of four document scans.

M output from the image scanner unit 201,
The image signals of C, Y, and Bk are input to the laser driver 212. The laser driver 212 modulates and drives the light emission of the semiconductor laser element 213 according to the input image signal. Laser light is reflected by polygon mirror 214, f-θ lens 215, mirror
The photosensitive drum 217 is scanned via the photosensitive drum 216 to form a latent image.
Reference numeral 218 denotes a rotary developing unit, which includes a magenta developing unit 219 and a cyan developing unit.
The developing unit 220 includes a yellow developing unit 221 and a black developing unit 222. The four developing units alternately contact the photosensitive drum 217 to develop the latent image formed on the photosensitive drum 217 with toner. Reference numeral 223 denotes a transfer drum, and the paper supplied from the paper cassette 224 or 225 is wound around the transfer drum 223, and the toner image on the photosensitive drum 217 is transferred.

The sheet on which the four colors of M, C, Y, and Bk are sequentially transferred in this manner passes through the fixing unit 226, and the toner is fixed on the sheet.

[Image Scanner Unit] FIG. 1 is a block diagram showing the configuration of the image scanner unit 201 in the first embodiment. In the figure, 210-1, 210-2
And 210-3 are CCD (individual imaging device) sensors having red (R), green (G), and blue (B) spectral sensitivity characteristics, respectively. Each of the A / D converted 8 bits (0 to 255) Outputs an image signal.

In the present embodiment, the sensor 21 used
0-1, 210-2, and 210-3 are arranged at a fixed distance from each other.
In, the spatial shift is corrected.

Reference numerals 403, 404 and 405 denote log converters, each of which is constituted by a look-up table ROM or RAM, and converts a luminance signal into a density signal. 406 is known masking and U
The CR (under color removal) circuit, although detailed explanation is omitted, the magenta (M), cyan (C), yellow (Y) and black (Bk) signals for image output from the input YMC signal Is output with a predetermined bit length, for example, 8 bits, in a frame-sequential manner at each reading operation.

A known spatial filter circuit 407 corrects a spatial frequency of an output signal. A density conversion circuit 408 corrects the density characteristics of the printer unit 202.
As in the case of the log converters 405 to 405, it is configured by a lookup table of ROM or RAM.

On the other hand, reference numeral 414 denotes a micro computer (hereinafter referred to as CPU) for controlling the apparatus, and 415 denotes a CPU.
ROM storing a program for operating 414, 41
Reference numeral 6 denotes a RAM used as a work area for executing various programs. Reference numeral 413 denotes an input / output port (hereinafter, I / O port) connected to the CPU 414, and reference numeral 409 denotes a specific document determination circuit. Specific document determination circuit 409
Determines that at least one of a plurality of specific documents is being read, and outputs a determination signal H as a multi-valued 2-bit. That is, when it is most likely that at least one of the plurality of specific originals is being read, H = “3” is output, and when the possibility is least, H = “0” is output. I do. Also, the judgment circuit 409
A thinning circuit 301 and a frequency dividing circuit 3 described with reference to FIG.
10 for thinning out the input R, G, and B signals.

The CNO signal is a 2-bit plane-sequential signal, and is a control signal indicating the order of four reading operations.
FIG. 16 is a diagram showing the relationship between the CNO signal and the print output according to the first embodiment.
Generated via the I / O port 413,
The operating conditions of the UCR circuit 406 are switched. Further, the CNO signal of the above-described frame-sequential signal is also input to the determination circuit 409, and for each of the four reading operations, the determination reference can be switched to determine a different specific document.

Reference numeral 410 denotes a pattern adding circuit which adds a pattern which is difficult for human eyes to recognize to a copied image in accordance with a 2-bit pattern level selection signal PS specified by the CPU 414. The pattern to be added depends on the image scanner unit 20
It is created from the image signal P read in 1.

[Timing Chart] FIG. 4 is a circuit diagram showing a configuration of a thinning circuit according to the first embodiment, and FIG. 5 is a circuit diagram showing a configuration of a frequency dividing circuit according to the first embodiment. FIG. 7 is a timing chart of signals in the main scanning direction in the first embodiment.

The VSYNC signal is a sub-scanning section signal,
It is a signal indicating the sub-scanning image output section. HSYNC
Is a main scanning synchronization signal, which is a signal for synchronizing the start of main scanning. CLK is an image transfer clock, and is a basic clock for various image processing in this embodiment.

On the other hand, CLK ′ is obtained by dividing the frequency of the CLK signal by １ ／, and becomes a basic clock in the judgment circuit 409. The SEL signal is a timing signal used in the above-described thinning circuit 301, and is generated by the frequency dividing circuit 310 shown in FIG. That is, the frequency dividing circuit 310
Comprises an inverter 451, a bit counter 452, an inverter 453, and an AND gate 454. 2
The bit counter 452 has a main scanning synchronization signal HSY.
After being cleared (initialized) by the NC signal, the CLK signal is counted and the count value is output in two bits (D0, D1). The upper bit D1 is output as the CLK4 signal, and the logical product of the inverted signal of the lower bit D0 and the upper bit D1 is output as the SEL signal.

As a result, flip-flops 455, 456, 457, 461, 462 and 463 holding data by the CLK signal, selectors 458, 459 and 460, and flip-flops 464, 465 holding data by the CLK 'signal and As shown in FIG. 7, the thinning circuit 301 composed of 466 extracts the CLK ′ extracted from the R (or G, B) signal transferred in synchronization with the CLK signal at a rate of 1/4. An R ′ (or G ′, B ′) signal synchronized with the signal can be obtained.

[Determination Circuit] FIG. 3 is a block diagram showing a configuration of the determination circuit 409 in the first embodiment. 4, reference numeral 301 denotes the thinning circuit shown in FIG. 4, which performs data thinning processing to reduce the processing load on the determination circuit 409 itself. 302 is color matching
Look-up table ROM (hereinafter "color matching LUT")
In this case, the color matching is performed with a plurality of types (securities, bills, etc.) of specific manuscript images prepared in advance. In the color matching LUT 302, the color distribution of 32 specific document images is checked in advance, and the color of the pixel is
The determination result of whether or not the color matches the color of the specific document image is held.

That is, the upper two bits of the address of the color matching LUT 302 include the CNO signal, which is a frame-sequential signal, and the lower two bits.
The higher 5 bits of the thinned RGB image signal are input to the 15 bits. For each of the values 0 to 3 of the CNO signal, whether the color of the corresponding pixel matches the color in the eight types of specific original images is simultaneously output in correspondence with the 8-bit data, and read four times. Total in operation
A determination is made for the 32 types of specific document images.

.., 303-8 are color determining circuits each composed of the same hardware, and include an integrator 306, registers 307-1, 307-2 and 307-3, And outputs a 2-bit signal as a result of determining the possibility that a specific document image exists. 309 is a maximum value circuit, and the color judgment circuits 303-1 to 303-
The maximum value of the judgment result output of 8 is output. In other words, a determination result is output for the eight types of specific document images that are most likely to be present.

[Integrator] FIG. 6 is a block diagram showing the configuration of the integrator 306 according to the first embodiment.
FIG. 4 is a diagram showing input and output of the integrator 306 according to the first embodiment. In FIG. 6, reference numerals 501 and 505 denote flip-flops for retaining data at the rising timing of the CLK 'signal. Reference numeral 502 denotes a multiplier, which is an 8-bit 2
An input signal (A, B) is input, and an 8-bit signal (A × B / 255) is output as a multiplication result. A multiplier 503 receives a 1-bit input signal (A) and an 8-bit input signal (B), and outputs an 8-bit output signal (A × B) as a multiplication result. An adder 504 receives an 8-bit 2-input signal (A, B) and outputs an 8-bit signal (A + B) as an addition result.

As a result, in the integrator 306, 2
The 8-bit output signal y _i is represented by the following equation (1) with respect to the value input signal x _i . That is,

[0029]

(Equation 1) It is. Here, α and β are preset constants, and various characteristics of the integrator 306 are determined by the magnitudes of these values.

For example, when α = 247 and β = 8, an output yi as shown in FIG. 8 is output for an input xi as shown in FIG.

Here, an input in which the circumference is almost "0" like the points 701 and 702 but "1" despite being almost "0", or a circumference almost "1" as in the point 703. Nevertheless, an input that is “0” is considered to be noise. This is processed by the integrator 306, and 704-1 (R1 value) and 704-2 (R1 value) are stored in the register 307 of FIG.
By setting a threshold value indicated by a level of (binary value), 704-3 (R3 value), and binarizing the output _yi of the integrator 306 with this, noise (noise) can be removed.

[Comparator Module] FIG. 10 is a block diagram showing the configuration of the comparator module 310 according to the first embodiment. In the figure, reference numerals 801, 802, and 803 indicate comparators, 804 indicates an inverter, 805 indicates an AND gate, and 8
Reference numerals 06 and 807 indicate OR gates, respectively. The register 307-1 includes R1 and the register 307 described in FIG.
The value of R2 described in FIG. 8 is set in -2, the value of R3 described in FIG. 8 is set in the register 307-3, and R1> R2
> R3. As a result of this configuration, the result of the determination is quantized into two bits and output.
That is, when R1 <(input), 11 is output, and when R2 <(input) ≦ R1, 10 is output.
If 3 <(input) ≦ R2, 01 is output and (input)
If ≤R3, 00 is output. [Pattern Adding Circuit] FIG. 11 is a block diagram showing the configuration of the pattern adding circuit 410 according to the first embodiment, and FIG. 14 is a top view of a document table according to the first embodiment. FIG.
1, reference numeral 901 denotes a sub-scanning counter; 902, a main scanning counter; 903, a look-up table RAM (hereinafter referred to as "LUT"); 905, a flip-flop;
3 is an AND gate, 906, 907, 908, 909 are registers, 910 is a 4 to 1 selector, 911, 913
Denotes an AND gate, and 912 denotes an adder. 914 represents the image signal P after passing through the spatial filter as 2
This is a binarization circuit that outputs a value of 1 when the value of the image signal is larger than a predetermined threshold value, and outputs 0 when the value of the image signal is smaller than the predetermined threshold value. The binarized data output from the binarization circuit 914 is written to the dual port RAM 915. The image to be written to the dual port RAM 915 is the image scanner unit 201 as shown at 1204 in FIG.
Is an image written in a specific location. That is, control is performed so that the image signal P is a signal generated from the green (G) signal of the CCD 210. This is because the green signal is easily closest to the luminance signal of the image.

Since RAM 915 is a dual port RAM, C
The contents can be read from the PU 414 using the data bus Data and the address bus Adr. Similarly, since the RAM 903 is also a dual-port RAM, data read from the RAM 915 can be written to the dual-port RAM 903 using the data bus Data and the address bus Adr. next,
The above operation will be described in detail.

FIG. 15 is a flowchart for explaining the service mode according to the first embodiment.

That is, in the service mode, the CPU 414
Sets the CNO signal to 0 (S1501) and starts the pattern reading operation (S1502). The CPU 414 sets the address of the dual port RAM 915 to the address bus Adr (S1503),
The data of the dual port RAM 915 is read (S1504).

Then, the CPU 414 sets the address of the dual port RAM 903 on the address bus Adr (S1505), and writes the data read from the dual port RAM 915 to the dual port RAM 903 (S1506).

The reading of this pattern is performed once when the copier body is installed in a mode that can be used only by a service person.

Here, the sub-scanning counter 901 repeatedly counts the main scanning synchronizing signal HSYNC, and the main scanning counter 902 counts the pixel synchronizing signal CLK by 9 bits, that is, 512 cycles. The lower 6 bits of each count value of the sub-scanning counter 901 and the main scanning counter 902 are input to the dual port RAM 903 holding the pattern to be added.

The output of the dual-port RAM 903 refers to only one bit.
It is logically ANDed with 1 and the upper 3 bits of the sub-scanning counter 902. After the output of the AND gate 904 is synchronized with the CLK signal by the flip-flop 905, the output of the AND gate 913 is AND-operated with the CNO signal which is a 2-bit field sequential signal, and
Sent to 911. Therefore, the output of AND gate 913 is CNO = 2
That is, it is effective only when the yellow print operation is being performed.

On the other hand, registers 906, 907, 908,
909 hold values P1, P2, P3, and P4 in advance, and any one of P1 to P4 is selected in accordance with a pattern level selection signal PS specified by the CPU 414, and is passed through an AND gate 911. The adder 912 adds a pattern to the input signal V and outputs V ′. Therefore, when CNO = 2, that is, when printing is currently performed in yellow, the pattern held in the dual port RAM 903 is repeatedly read and added to the signal to be output.

Each register is set to a value satisfying P1 <P2 <P3 <P4. When s = 00 (hereinafter, s and PS are all represented by binary numbers), Y = A, s = 01 When Y =
B, Y = C when s = 10, and Y = when s = 11
The operation of the selector 910 is set so as to select D.
Therefore, when PS = 00, V '= V + P1, and when PS = 01,
A signal V 'is added to V' = V + P2, V '= V + P3 when PS = 10, and V' = V + P4 when PS = 11. Output from 410.

Here, the pattern to be added is added using only the yellow toner so that it is difficult for the human eyes to identify the pattern. It is based on the weak ability. Furthermore, by changing the level of the pattern to be added according to the possibility that a specific document exists in the input image,
In a normal copy, the pattern is made hardly discernible by human eyes, and the higher the possibility that the specific document exists, the more the pattern is added.

[Copy Result] FIG. 12 is a diagram showing an example of a copy result according to the first embodiment. In the figure, reference numeral 1001 denotes an added pattern, and the content held in the dual port RAM 903 is added as an image. In the example shown in FIG. 12, “ABC
The two-stage pattern of "D" and "1234" is added in a pattern of 64 pixels x 64 pixels so that it is difficult for the human eyes to recognize, and is repeated every 512 pixels in the main scan and 512 lines in the sub-scan. Therefore, if a unique serial number or a coded serial number is added to the copying apparatus as a pattern,
By examining the copy, the device used for copying can be specified.

Further, when there is a high possibility that a specific document that should not be copied is present in the read image,
You can also add a tight pattern.

Further, in this embodiment, the pitch at which the pattern is added is 512 pixels or lines.
In this embodiment, since the resolution is 400 dpi (dots / inch), a pattern is added about every 32.5 mm. on the other hand,
The width in the short direction of banknotes (Bank of Japan note) is about 76mm, and the width in the short direction of banknotes in major countries is also approximately between 60mm and 120mm. Thus, a pattern is added to the image of the copied bill. Therefore, even if the image portion of the bill is cut out and abused, the copy can be identified and the added pattern can be read to identify the copy machine number used for copying. .

[Flowchart] FIG. 13 is a flowchart for explaining the procedure for setting the pattern level selection signal PS by the CPU 414 of the first embodiment.

First, immediately after the start of copying, in step 1102, "0" is set to the pattern level selection signal PS. Next, in step 1103, the current judgment level H is compared with the value of PS. If H is larger, the value of H is set in PS in step 1104. Otherwise, return to step 1103. That is, the maximum value from the copy start to the present is set to PS based on the history of the determination signal H.

As described above, according to the first embodiment, as a method of specifying a device used for copying, a specific pattern which is hard to be recognized by human eyes is added to a copy so that the original copy can be copied. When a specific document (for example, a bill) that should not be copied is provided, it is possible to provide a clue for specifying a device used for the copying. Furthermore, by repeatedly adding the specific pattern to be added at a pitch shorter than the length of the banknote in the width direction, the specific pattern is always added to the copy, and the device used for the copy or the copy You can identify or narrow down the people who did.

[0049]

[Second Embodiment] In the first embodiment, an example has been described in which a device-specific serial number or a coded version of the serial number is added as a specific pattern. It is not something that can be done.

For example, the information may be information for specifying the apparatus, such as the manufacturing date of the apparatus, the lot number of the apparatus, and the version of the apparatus.

[0051]

Third Embodiment In the first embodiment, an example has been described in which the image scanner unit 201 reads an image previously drawn at a specific location as a pattern to be added. A document on which a code, in other words, a code specifying a user is written, can be read as a pattern to be added on document glass 203.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. It is needless to say that the present invention can be applied to a case where the present invention is achieved by supplying a program to a system or an apparatus.

[0053]

As described above, according to the present invention,
Information for specifying the apparatus can be added to the document image as an image that is difficult for human eyes to recognize. Further, information for specifying the apparatus can be obtained by effectively utilizing the reading means for reading the document image. Therefore, for example, when a copy or the like is prohibited from being copied (specific document), information for identifying the apparatus is read from the copy or a part of the copy, and the copying machine used for the copy is read. Can be identified.

[Brief description of the drawings]

FIG. 1 is an image scanner unit 201 according to a first embodiment.
It is a block diagram which shows a structure of.

FIG. 2 is a side sectional view showing a configuration of the copying machine according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a determination circuit 409 according to the first embodiment.

FIG. 4 is a circuit diagram showing a configuration of a thinning circuit according to the first embodiment.

FIG. 5 is a circuit diagram showing a configuration of a frequency dividing circuit according to the first embodiment.

FIG. 6 is a block diagram showing a configuration of an integrator 306 according to the first embodiment.

FIG. 7 is a timing chart of signals in the main scanning direction in the first embodiment.

FIG. 8 is a diagram showing input and output of an integrator 306 according to the first embodiment.

FIG. 9 is a diagram showing input and output of an integrator 306 according to the first embodiment.

FIG. 10 shows a comparator module 310 according to the first embodiment.
It is a block diagram which shows a structure of.

FIG. 11 is a pattern adding circuit 410 according to the first embodiment.
It is a block diagram which shows a structure of.

FIG. 12 is a diagram illustrating an example of a copy result according to the first embodiment.

FIG. 13 is a flowchart illustrating a procedure for setting a pattern level selection signal PS by a CPU 414 according to the first embodiment.

FIG. 14 is a top view of the document table according to the first embodiment.

FIG. 15 is a flowchart illustrating a service mode according to the first embodiment.

FIG. 16 is a diagram illustrating a relationship between a CNO signal and a print output according to the first embodiment.

[Explanation of symbols]

200 Mirror pressure plate 201 Image scanner unit 202 Printer unit 203 Platen 204,801 Document 205 Lamp 206,207,208 Mirror 209 Lens 210 3Line 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 210-1 to 210-3 CCD 301 Thinning circuit 302 Color matching LUTs 303-1 to 303-8 Tint determination circuits 307-1 to 307-3 Registers 308 Comparator modules 309 Maximum value circuits 310 Frequency divider circuits 40 , 402 delay element 403 to 405 log converter 406 masking / UCR circuit 407 spatial filter 408 density conversion circuit 409 determination circuit 410 pattern addition circuit 413 I / O 414 CPU 415 ROM 416 RAM 451, 453, 804 inverter 452 2 bit counter 454 , 805, 911, 913 AND gates 455-457, 461-466, 501, 505 Flip-flops 458-460, 910 Selectors 502, 503 Multipliers 504, 912 Adders 801 802 803 Comparators 806 807 OR gate 901 Scan counter 902 Main scan counter 903 LUT 905 Flip flop 906, 907, 908, 909 Register

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 1/387 G03G 15/01 H04N 1/40

Claims (7)

(57) [Claims] A reading unit for reading a document image; a storage unit for storing an image for specifying an apparatus, which is recorded at a specific location of the reading unit and read by the reading unit; the document image is read by means adds the image stored in the storage means, and adding means for outputting the image to which the image for identifying the device, a plurality of colors an image output from said adding means Use of recording agent
There possess a forming means for image forming, the additional means, the image for identifying the device the
Recording of colors that are difficult for human eyes to distinguish among multiple color recording agents
The original image so as to form an image with the agent.
An image processing apparatus for adding an image for specifying a location . 2. The image processing method according to claim 1, wherein the original image is composed of a plurality of color components, and
The apparatus according to claim 1, characterized that you added to the image for identifying the device to the color component corresponding to the identification difficult color recording agent in the eyes between. 3. The image processing apparatus according to claim 1, wherein the image for specifying the apparatus includes an image indicating a number capable of specifying the image processing apparatus. 4. The image processing apparatus according to claim 1, wherein the image for specifying the apparatus includes an image indicating a serial number of the image processing apparatus. 5. The image processing apparatus according to claim 1, wherein the image for specifying the apparatus includes an image indicating a date of manufacture of the image processing apparatus. 6. Further, the image formed of the said forming means
Image processing apparatus according to claim 1, claim 5, characterized in that it comprises a recording means for recording images that Re in a recording medium. 7. A document image recorded at a specific location of a reading unit for reading a document image and stored in a memory, the image for specifying a device read by the reading unit, and the document image read by the reading unit. a plurality adds the image stored in the memory, and outputs the image which the image has been added for identifying the device, the image which the image has been added for identifying the device
Each step of forming an image using a color recording material, the image for specifying the apparatus is the multi-color recording material
Image formation using a recording material of a color that is difficult for human eyes to recognize
To specify the device in the original image
An image processing method characterized by Rukoto image is added.