JP7192584B2 - Image processing device, method, and program - Google Patents

Description

The present invention relates to an image processing device, method, and program.

ACS (Auto Color Selection) technology is conventionally known as an automatic color selection function for copying and scanning.

In ACS, for example, after capturing an image signal in which each pixel is represented by three color components or K component, the sum of pixel values is calculated for each of a plurality of pixels within rectangular elements partitioned by grids along the main scanning and sub-scanning directions. be done. Among the three color components of the sum of the pixel values, when the differences in pixel values are all less than the threshold, the pixel values of the three color components are converted into K components, and further divided into the K components of each of a plurality of pixels. . In addition, there is also a technique disclosed for adjusting automatic color selection (Patent Document 1).

However, with the conventional automatic color selection function, since the parameters for color determination are fixed, the monochrome (or color) output result desired by each user cannot be obtained according to the document. There was a problem that there was no corresponding function.

The present invention has been made in view of the above, and provides an image processing apparatus, method, and program capable of improving accuracy so as to obtain desired monochrome (or color) output according to the user. intended to provide

In order to solve the above-described problems and achieve the object, the image processing apparatus of the present invention includes determination means for determining whether an input document is a color document or a monochrome document, and a color document by a user operation. or registering means for registering a document as a monochrome document; and generating means for generating determination parameters for the determining means in accordance with the document registered by the registering means, wherein the generating means is registered by the registering means. The determination parameters are adjusted by adjusting the color determination threshold value until the color determination result is registered by the user in order of the hues contained in the registered document according to the user's operation to set the registered document as a color document or a monochrome document. Generate automatically .

According to the present invention, it is possible to improve the accuracy so that the monochrome (or color) output desired by the user can be obtained.

FIG. 1 is a diagram showing an example external configuration of an image processing apparatus according to an embodiment. FIG. 2 is a diagram showing an example of the hardware configuration of the MFP. FIG. 3 is a diagram showing an example of the configuration of functional blocks of the MFP. FIG. 4 is a diagram showing an example of the overall flow for generating parameters for automatic color selection. FIG. 5 is a flowchart showing an example of parameter automatic adjustment processing. FIG. 6 is a diagram showing an example of a selection screen displayed in the automatic color selection mode. FIG. 7 is a diagram showing an example of predetermined buttons to be displayed after copying is completed. FIG. 8 is a diagram showing an example of an overall flow for generating parameters for automatic color selection according to Modification 1. As shown in FIG. FIG. 9 is a diagram showing an example of a case where the parameters do not hold for the registered manuscript. FIG. 10 is a flow diagram showing an example of the second automatic parameter adjustment. FIG. 11 is an explanatory diagram of grouping that satisfies a color determination threshold value. FIG. 12 is a diagram showing a state in which two MFPs are connected to a network.

Embodiments of an image processing apparatus, method, and program according to the present invention will be described in detail below with reference to the accompanying drawings. An example of application to an MFP (Multifunction Peripheral) as an image processing device is shown, but the image processing device is not limited to the MFP, and can be applied to any device that performs image processing, such as a scanner or a copier. can.

(Embodiment)
FIG. 1 is a diagram showing an example external configuration of an image processing apparatus according to an embodiment. Here, as an example, an external configuration of an MFP having an image reading unit and an image forming unit, and basic functions of copying, scanning, facsimile, and printer is shown.

The MFP 1 shown in FIG. 1 includes a main body 10, an image reading section 10-1 as a scanner, and an image forming section 10-2 as a plotter. The image reading unit 10-1 has a contact glass that is a reading glass for reading a document, and irradiates the document (color document or monochrome document) with light through the contact glass to one-dimensionally scan the CCD. (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) image sensor. A document input by imaging is output as image data (RGB).

An operation panel 11 provided on the main body 10 is a user interface that displays a setting screen and receives input of device settings of the main body 10 from the user.

(Hardware configuration)
FIG. 2 is a diagram showing an example of the hardware configuration of MFP1. As shown in FIG. 2, the MFP 1 has a controller 910, a short-range communication circuit 920, an engine control section 930, an operation panel 940, and a network I/F 950.

Among these, the controller 910 includes a CPU 901, a system memory (MEM-P) 902, a north bridge (NB) 903, a south bridge (SB) 904, an ASIC (Application Specific Integrated Circuit) 906, and a storage unit, which are the main parts of the computer. A local memory (MEM-C) 907 , an HDD controller 908 , and an HD 909 as a storage unit, and the NB 903 and ASIC 906 are connected by an AGP (Accelerated Graphics Port) bus 921 .

Among these, the CPU 901 is a control unit that performs overall control of the MFP 1 . The NB 903 is a bridge for connecting the CPU 901, the MEM-P 902, the SB 904, and the AGP bus 921, and is a memory controller that controls reading and writing with respect to the MEM-P 902, a PCI (Peripheral Component Interconnect) master, and an AGP target. have

The MEM-P 902 is composed of a ROM 902a, which is a memory for storing programs and data for realizing each function of the controller 910, and a RAM 902b, which is used as a drawing memory for expansion of programs and data, memory printing, and the like. The program stored in the RAM 902b is configured to be provided by being recorded in a computer-readable recording medium such as a CD-ROM, CD-R, DVD, etc. as a file in an installable format or an executable format. You may

SB 904 is a bridge for connecting NB 903 with PCI devices and peripheral devices. The ASIC 906 is an image processing IC (Integrated Circuit) having hardware elements for image processing, and serves as a bridge that connects the AGP bus 921, PCI bus 922, HDD 908 and MEM-C 907, respectively. This ASIC 906 includes a PCI target and AGP master, an arbiter (ARB) that forms the core of the ASIC 906, a memory controller that controls the MEM-C 907, and multiple DMACs (Direct Memory Access Controllers) that perform image data rotation, etc. by hardware logic. , and a PCI unit that transfers data between the scanner unit 931 and the printer unit 932 via the PCI bus 922 . Note that the ASIC 906 may be connected to a USB (Universal Serial Bus) interface or an IEEE 1394 (Institute of Electrical and Electronics Engineers 1394) interface.

MEM-C 907 is a local memory used as an image buffer for copying and an encoding buffer. The HD 909 is a storage for accumulating image data, accumulating font data used for printing, and accumulating forms. The HD 909 controls reading or writing of data to or from the HD 909 under the control of the CPU 901 . The AGP bus 921 is a bus interface for graphics accelerator cards proposed to speed up graphics processing, and can speed up the graphics accelerator card by directly accessing the MEM-P 902 with high throughput. .

The near field communication circuit 920 also includes a near field communication circuit 920a. The short-range communication circuit 920 is a communication circuit for NFC, Bluetooth (registered trademark), or the like.

Furthermore, the engine control section 930 is configured by a scanner section 931 and a printer section 932 . The operation panel 940 displays a current setting value, a selection screen, and the like, and a panel display unit 940a such as a touch panel for receiving input from an operator, and setting values for image forming conditions such as density setting conditions. An operation panel 940b is provided which includes a numeric keypad for accepting a copy start instruction, a start key for accepting a copy start instruction, and the like. A controller 910 controls the entire MFP 1, such as drawing, communication, and input from an operation panel 940, for example. The scanner unit 931 or printer unit 932 includes an image processing part such as error diffusion and gamma conversion.

It should be noted that the MFP 1 can switch and select the copy function, the printer function, and the facsimile function in sequence using a switch key on the operation panel 940 . When the copy function is selected, the copy mode is selected, when the printer function is selected, the printer mode is selected, and when the facsimile mode is selected, the facsimile mode is selected.

A network I/F 950 is an interface for data communication using the communication network N. FIG. A short-range communication circuit 920 and a network I/F 950 are electrically connected to the ASIC 906 via a PCI bus 922 .

(Configuration of functional blocks)
FIG. 3 is a diagram showing an example of the functional block configuration of the MFP 1. As shown in FIG. The functional blocks of the MFP 1 shown in FIG. 3 are implemented as modules or the like by the CPU 901 of the MFP 1 executing programs in the ROM 902 a and the HD 909 .

As shown in FIG. 3, the MFP 1 implements a control unit 100 . The control unit 100 includes an image reading unit 101, an image processing unit 102, an input reception unit 103, a display output unit 104, a storage control unit 105, a parameter adjustment unit 106, a print control unit 107, and a communication control unit. 108 and so on. Here, the image reading unit 101 and the image processing unit 102 mainly correspond to the "determining means". The input reception unit 103, the display output unit 104, the storage control unit 105, and the like correspond to "registration means". The parameter adjustment unit 106 corresponds to "generating means". The communication control unit 108 corresponds to "transmitting means".

Specifically, the image reading unit 101 reads image data (RGB image data) from the scanner unit 931 . The image processing unit 102 performs image processing on image data (RGB image data). Further, the image processing unit 102 performs processing for automatically determining whether the input document is a color document or a monochrome document from the image data.

The input reception unit 103 receives input from the operator through the touch panel of the operation panel 940, the operation panel 940b, or the like. The display output unit 104 causes the panel display unit 940a to display an operation screen for setting, selection, and the like.

The storage control unit 105 writes settings and the like to a storage unit (RAM 902b, HD 909, etc.) and reads settings and the like from the storage unit. For example, by registration processing, a document for which color determination is to be changed and the setting of color determination are stored in association with each other, or parameters (determination parameters) generated by automatic parameter adjustment processing are stored or reflected.

A parameter adjustment unit 106 generates parameters in the automatic color determination mode. For example, parameters are obtained by parameter adjustment. Here, the parameter is a determination parameter used when the image processing unit 102 automatically determines color or monochrome.

The print control unit 107 controls the printer unit 932 to transfer the image data to a print, and outputs the print.

Communication control unit 108 controls communication with a communication destination by controlling a communication unit (network I/F 950, short-range communication circuit 920, etc.).

(processing flow)
Next, when copying a document, for example, the MFP 1 reads image data (RGB) from the document set on the contact glass of the image reading unit 10-1, automatically determines whether the document is color or monochrome, and then From 10-2, the image is printed out with the automatically determined color. If the color of the document to be printed does not match the color determination result expected by the user, the automatic determination mode is used to adjust the parameters for color determination. The automatic determination mode can be switched to according to a user operation by displaying a screen including a mode switching button on the panel display unit 940a or providing a mode switching button on the operation panel 940b.

FIG. 4 is a diagram showing an example of the overall flow for generating parameters for automatic color selection. First, the control unit 100 shifts to the automatic determination mode (step S1).

Subsequently, the control unit 100 reads a document for which the user wants to adjust the result of automatic color selection (step S2). For example, the control section 100 takes an image of a document set on the contact glass of the image reading section 10-1 with an imaging sensor and inputs it as image data (RGB).

Subsequently, the control unit 100 allows the user to select whether the document read in step S2 is to be determined as a color document or a monochrome document (step S3).

Subsequently, the control unit 100 associates the image data of the document read in step S2 with the determination result selected in step S3 and registers them in the HD 909 (step S4). Note that the registration destination is not limited to the HD 909, and other recording media may be used.

Subsequently, the control unit 100 determines whether there is another document for which the user wants to adjust the result of automatic color selection (step S5). If there is another document to be adjusted (step S5: Yes), the control unit 100 repeats steps S2 to S4. Then, when all the documents to be adjusted have been read (step S5: No), the control section 100 performs parameter automatic adjustment processing for those documents (step S21), and ends the process.

In the automatic parameter adjustment process in step S21, the control unit 100 performs a process of generating a color determination threshold value for automatic color selection for each document that has been read. This parameter automatic adjustment processing will be described in more detail with reference to FIG.

FIG. 5 is a flowchart showing an example of parameter automatic adjustment processing. The control unit 100 performs the parameter automatic adjustment process shown in FIG. 5 to adjust the image data of each read document and the color determination threshold value for obtaining the expected color or monochrome color determination result.

Specifically, the control unit 100 selects one set for which automatic parameter adjustment processing has not been performed, from among a plurality of sets in which each image data saved in step S4 and the automatic color determination result of each image data are linked. is selected (step S31).

Subsequently, the control unit 100 determines whether the color determination result (color determination result expected by the user) associated with the image data of the document included in the selected set remains with the initial parameters. It is determined whether or not (step S32).

Then, if the control unit 100 determines that the color determination result expected by the user cannot remain the parameters in the initial state (step S32: No determination), the control unit 100 performs color determination by hue division on the selected image data. (step S33). Hue division is a process of separating input RGB data into R, G, B, C, M, and Y signals, and is disclosed in Japanese Unexamined Patent Application Publication No. 2001-103301, for example. Although the published method includes W and Bk, we exclude them.

In order to perform color determination, the control unit 100 provides the image processing unit 102 with a hue dividing unit, a line memory for storing five lines each of C, M, and Y outputs from the hue dividing unit, and a color pixel block of the input image data. is determined and a B/C signal is output, and a color pixel determination unit determines whether the document is a color document or a black and white document.

The hue division section separates the input RGB data into R, G, B, C, M, and Y signals, and further extracts white pixels for color pixel determination. As an example of hue division, the boundary of each color is obtained, and the difference between the maximum and minimum values of RGB is defined as the RGB difference, and the following is performed. It should be noted that here, the RGB data becomes blacker as the numbers become larger.

(1) RY hue region boundary (ry)
R-2*G+B>0
(2) YG hue area boundary (yg)
11*R-8*G-3*B>0
(3) GC hue region boundary (gc)
1*R-5*G+4*B<0
(4) CB hue region boundary (cb)
8*R-14*G+6*B<0
(5) BM hue region boundary (bm)
9*R-2*G-7*B<0
(6) MR Hue Region Boundary (mr)
R+5*G-6*B<0
(7) If Y pixel determination (ry==1) & (yg==0) & (RGB difference>thy), Y pixel determination is made.
(8) G pixel determination If (yg==1) & (gc==0) & (RGB difference>thg), G pixel determination is made.
(9) If C pixel determination (gc==1) & (cb==0) & (RGB difference>thc), C pixel determination is made.
(11) B pixel determination If (cb==1) & (bm==0) & (RGB difference>thb), B pixel determination is made.
(12) If M-pixel determination (bm==1) & (mr==0) & (RGB difference>thm), M-pixel determination is made.
(13) R pixel determination If (mr==1) & (ry==0) & (RGB difference>thr), R pixel determination is made.

Here, regarding the above priorities (7) to (13), priority is given to the smaller number. thy, thm, thc, thr, thg, and thb are color determination threshold values determined before copying (processing). The RGB difference is the difference between the maximum value and the minimum value of each of RGB image data within one pixel.

As an output signal, c, m, and y are output with 3 bits. That is, 3 bits represent c, m, y, r, g, and b. The reason why the color determination threshold is changed for each hue is that the color determination threshold is determined according to the hue area when the chromatic range is different for each hue area.

Outputs c, m, and y of the hue division section are each stored in line memories for five lines, and are color-determined by the color pixel determination section.

It should be noted that this example of hue division is just an example and is not limited to this, and it goes without saying that other equations may be used.

Subsequently, the control unit 100 adjusts the color determination threshold value based on the parameters in the initial state so that the hue that is included most in the image data is the color determination result expected by the user from the color determination result of step S33. (Step S34). At this time, the control unit 100 adjusts the image data to a color determination threshold value with a margin of about five values, instead of a color determination threshold value that gives the result expected by the user. This is to obtain the color determination result expected by the user even if there is variation in reading the document.

Subsequently, the control unit 100 determines whether the image data has the color determination result expected by the user based on the color determination threshold adjusted in step S34 (step S35). If the image data has the color determination result expected by the user (step S35: Yes), the parameter adjustment for the selected document ends.

On the other hand, if the image data does not yield the color determination result expected by the user (step S35: No), another color determination threshold value is adjusted (step S34'). Here, a color determination threshold value different from the hue adjusted in step 34 is adjusted. For example, the color determination threshold value is adjusted based on the parameters in the initial state so that the hue that is included in the second largest amount in the image data is the color determination result expected by the user.

Subsequently, the control unit 100 determines whether the image data has the color determination result expected by the user based on the color determination threshold adjusted in step S34' (step S35'). If the image data has the color determination result expected by the user (step S35': Yes), the parameter adjustment for the selected document is finished.

On the other hand, if the image data does not produce the color determination result expected by the user (step S35': No), another color determination threshold is adjusted in the same manner as in steps S34' and S35'. In steps S34' and S35', another color determination threshold is adjusted until the image data has the color determination result expected by the user. In this example, the color determination threshold is adjusted within the range up to the hue that is contained in the image data at the sixth most (step S34''). Then, when the image data becomes the color determination result expected by the user, it is determined whether or not there is a document for which parameter adjustment has not been performed (step S36). Returning to S31, the same adjustment is performed for the unprocessed document.

When all the originals have been adjusted (step S36: Yes), this process ends.

(Display screen)
Next, an example of a screen for allowing the user to select and register achromatic or chromatic colors in the automatic color selection mode will be shown.
FIG. 6 is a diagram showing an example of a selection screen displayed in the automatic color selection mode. The selection screen of FIG. 6A is an example of the selection screen displayed on the operation panel 11 by the control unit 100 in step S3 (see FIG. 4). The control unit 100 selects an achromatic or chromatic button (either the achromatic determination document registration button or the chromatic determination document registration button in FIG. 6A) on the displayed selection screen. Accept from users. The setting (achromatic or chromatic) of the button selected on this selection screen is associated and registered as the setting of the document.

The screen of FIG. 6B is a screen when either the achromatic determination document registration button or the chromatic determination document registration button is displayed. For example, when an achromatic determination document registration button is displayed, the document is registered as achromatic by operating the achromatic determination document registration button. If it is not operated for a predetermined time, it is registered as chromatic. Note that this screen includes a message "Please scan a document to be determined as achromatic (chromatic)". For example, when displaying a selection screen before scanning a document, such a display is used.

The process of selecting and registering achromatic or chromatic colors is started by pressing a predetermined button or the like when the result is not what the user expects when executing automatic color selection.

FIG. 7 is a diagram showing an example of predetermined buttons to be displayed after copying is completed. After the copying is completed, it can be known whether the document is determined to be achromatic or chromatic. After the copying is completed, a completion screen and a "Yes" button (corresponding to a predetermined button) for selecting whether to change the result of the automatic color selection are displayed, so that when the "Yes" button is selected, the automatic color selection mode is entered. Transition. If the "No" button is selected, the screen is closed and print output is completed.

(effect)
As described above, according to the present embodiment, it is possible to improve the accuracy so that the achromatic (or chromatic) output desired by the user can be obtained. For example, since each hue of RGBCMY can be used when determining the adjustment threshold for automatic color selection, the accuracy of color/monochrome determination for automatic color selection can be improved. Furthermore, by selecting a document that the user wants to determine as achromatic (or chromatic), the initially set automatic color determination parameters can be automatically reflected in parameters desired by the user according to the document. Become. Also, with the conventional method, it was difficult to make adjustments for delicate colors (such as dark blue and dark green) for which chromatic or achromatic judgments should be made, but adjustments for such exquisite colors are also possible.

In addition, by displaying the selection screen, parameters are not automatically generated only for documents that have been registered in advance, but the result was not what the user expected when copying or scanning was executed in the automatic color selection mode. It is also possible to generate internal parameters by automatically generating parameters based on a copied or scanned document by pressing a predetermined button. This makes it possible to easily change the internal parameters immediately when the user is dissatisfied.

(Modification 1)
A modified example for enabling the user to select from a plurality of parameter groups, the determination parameter group 1 and the parameter group 2, when an image to be determined as a color image and a monochrome image is incompatible.
Here, the parts common to the embodiment are given the same numbers and descriptions thereof are omitted, and different parts are mainly described.

(processing flow)
FIG. 8 is a diagram showing an example of an overall flow for generating parameters for automatic color selection according to Modification 1. As shown in FIG. Here, the description of the processing in steps S1 to S5 and step S21 is the same as in FIG. 4, so it will be omitted.

After step S21, the control section 100 determines whether or not the document registered in step S21 satisfies the color determination threshold value (step S6). If the color determination threshold is satisfied (step S6: Yes), the adjusted parameters are reflected in the machine and the process ends.

On the other hand, if the color determination threshold does not hold (step S6: No), the control section 100 performs the second parameter automatic adjustment (step S41).

FIG. 9 is a diagram showing an example of a case where the parameters do not hold for the registered manuscript. A document 40a in FIG. 9 is a document that is desired to be a chromatic document, and the color adjustment thresholds for C, M, Y, R, G, and B at that time are shown. A document 40b is a document that is desired to be an achromatic document, and the color adjustment thresholds for C, M, Y, R, G, and B at that time are shown.

The document 40a is not determined to be chromatic unless the M-hue color adjustment threshold is 45 or less, whereas the document 40b is not determined to be achromatic unless the M-hue color adjustment threshold is 55 or more.

In such a case, the second parameter automatic adjustment is performed in step S41 as described later.
FIG. 10 is a flow diagram showing an example of the second automatic parameter adjustment. First, the control unit 100 creates a group that satisfies the color determination threshold for each document in step S21 (see FIG. 8) (step S51).

Subsequently, the control unit 100 generates parameters so that an arbitrary color determination result can be obtained for each group created in step S51 (step S52).

Then, the control unit 100 allows the user to select which parameter to use from among the parameters for each group generated in step S52 (step S53).

FIG. 11 is an explanatory diagram of grouping that satisfies a color determination threshold value. Reference numeral 50a indicates that an arbitrary color determination result can be determined for originals 1, 2, and 3, but an arbitrary color determination result cannot be determined for original 4. FIG.

Reference numeral 50b indicates that an arbitrary color determination result can be determined for originals 2, 3, and 4, but an arbitrary color determination result cannot be determined for original 1. FIG. Note that the number of groups is an example, and the number of groups is not limited to this.

In the selection by the user in step S53, for example, the user selects which of the color determination result parameter 50a and the color determination result parameter 50b is to be used.

(Modification 2)
An internal parameter may be reflected to another individual via a network.
FIG. 12 shows a state in which two MFPs 1 (MFP1a, MFP1b) are connected to network N. As shown in FIG. Although the number is two in this example, the number is not limited to this, and may be three or more.

The control unit 100 of the first MFP 1a transmits the adjusted internal parameters to the second MFP 1b having the same scanner characteristics as the first MFP 1b via the network N, and the control unit 100 of the second MFP 1b , the internal parameters generated by the first unit can be reflected in the internal parameters of the own unit.

(effect)
Since this eliminates the need to adjust the internal parameters for each individual, it is possible to obtain the internal parameters having the automatic color selection function expected by the user in a short period of time.

The program executed by the image processing apparatus according to the present embodiment and each modified example may be provided by being incorporated in the ROM in advance. In addition, it is provided by being recorded in a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk), etc. as a file in an installable format or an executable format. good too. Alternatively, the software may be stored on a computer connected to a network such as the Internet, and provided by being downloaded via the network.

1 MFP
REFERENCE SIGNS LIST 100 control unit 101 image reading unit 102 image processing unit 103 input reception unit 104 display output unit 105 storage control unit 106 parameter adjustment unit 107 print control unit 108 communication control unit 901 CPU
902a ROM
909 HD

Japanese Patent Application Laid-Open No. 2004-364220

Claims (7)

determination means for determining whether an input document is a color document or a monochrome document;
a registering means for registering a manuscript as a color manuscript or a monochrome manuscript by user operation;
generating means for generating determination parameters for the determination means according to the document registered by the registration means;
with
The generation means performs color determination until a color determination result registered by the user is obtained in order of hues contained in the registered document in accordance with the user's operation to set the document registered by the registration means as a color document or a monochrome document. automatically generating the determination parameter by adjusting the threshold;
Image processing device. The color determination threshold is a color determination threshold for six hues of C, M, Y, R, G, and B.
2. The image processing apparatus according to claim 1, wherein: The registration means
Displaying a registration button for registering the document as a color document or a monochrome document after the user executes the automatic color selection function for the document and obtains the color determination result;
3. The image processing apparatus according to claim 1, wherein: The generating means is
Furthermore, a group is created in which a color determination threshold value is established for each document, and the user selects which parameter to use from among the parameters for each group.
4. The image processing apparatus according to any one of claims 1 to 3 , characterized by: transmitting means for transmitting the determination parameter generated by the generating means to another image processing device via a network;
5. The image processing apparatus according to any one of claims 1 to 4 , characterized by: A method for changing a result of color determination according to a document in an image processing device, comprising:
determining whether the input document is a color document or a monochrome document;
a step of registering a document as a color document or a monochrome document by a user operation;
generating a determination parameter for determining whether the input document is a color document or a monochrome document according to the registered document;
including
In the step of generating the determination parameter, color determination is performed until a color determination result registered by the user is obtained in accordance with the user's operation to determine whether the registered document is a color document or a monochrome document, in order of hues that are frequently included in the registered document. automatically generating the determination parameter by adjusting the threshold;
Method. The computer of the image processing device that inputs the manuscript,
determination means for determining whether an input document is a color document or a monochrome document;
a registering means for registering a manuscript as a color manuscript or a monochrome manuscript by user operation;
generating means for generating determination parameters for the determination means according to the document registered by the registration means ;
Adjusting the color determination threshold value until the color determination result registered by the user is obtained in order of hues contained in the registered document in accordance with the user's operation to set the document registered by the registration means as a color document or a monochrome document. As the generation means for automatically generating the determination parameter by
A program to make it work.

Images