JPH0771186B2 - Image recorder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus for reading a marker by pre-scanning to set editing information and reading a document by main scanning to edit and record image data. .

[Conventional technology]

In a digital color copying machine, an image reading unit that scans and reads an original, an image data processing unit that processes / edits the read image data, a recording unit that records the processed / edited image data, and an image reading / processing / editing unit.
The image data processing means can perform various editing processes on the image data by including a control means for controlling recording. Marker editing is one of them, and in normal marker editing, first, a closed area in which a closed area is written is read by prescanning and a marked closed area is recognized. Then, specified edit contents such as trimming, masking, color painting, and mesh are set in the closed region, the original is read by the main scan, and the image data subjected to the edit process is recorded. At present, the marker editing is often used for coloring a manuscript having a small number of colors such as a black-and-white manuscript, and the marker colors used include blue, pink and orange.

The marker editing as described above is basically an editing method by position specification, but in the digital color copying machine, there is also an editing using a data tablet as position specification editing other than the marker editing. Compared with editing using this data tablet, marker editing has the advantages that an arbitrary shape can be specified, operability is good, and colors can be recognized as commands by using markers of multiple colors. is doing. On the other hand, there is a drawback in that the original is damaged by the marker, the marker is not recognized or left unerased, and the original is limited by the color of the marker.

An outline of a digital color copying machine having the above marker editing function and other editing functions will be described below, which is separately filed by the applicant (for example, Japanese Patent Application No. 1-47088).

FIG. 8 is a diagram showing a configuration example of an image data processing system of a digital color copying machine.

In Fig. 8, IIT (Image Input Terminal) 100
Is a primary color of light B (blue), G using a CCD line sensor
(Green) and R (red) are separated and a color original is read and converted into digital image data.
The (image output terminal) 115 reproduces a color image by performing exposure and development with a laser beam.
The END conversion circuit 101 between the IIT 100 and the IOT 115 to the IOT interface 110 is an image data editing processing system (IPS;
Image processing system), and B,
G and R image data is converted to Y (yellow), M (magenta), C (cyan), and K (black or black) of toner, and a toner signal corresponding to the developed color is output for each development cycle. To do.

The IIT uses a CCD sensor to read one pixel for each of B, G, and R at a size of 16 dots / mm,
The data is output in 24 bits (3 colors x 8 bits; 256 gradations). The CCD sensor has B, G, and R filters mounted on the top surface, has a density of 16 dots / mm and a length of 300 mm, and has a process speed of 190.5 mm / sec and 16 lines / line.
Since mm scanning is performed, reading data is output at a speed of 15 MPixels per second for each color. And
In the IIT, the analog data of B, G, and R pixels is log-converted to convert the reflectance information into density information and further into digital data.

In IPS, color separation signals of B, G, and R are input from IIT, and various data processing is performed to improve color reproducibility, gradation reproducibility, definition reproducibility, etc. The toner signal is converted to on / off and output to the IOT. An END conversion (Equivalent Neutral Density) module 101 adjusts (converts) a gray-balanced color signal, and a color masking module 102 calculates a matrix of B, G, and R signals. The signals are converted into signals corresponding to the Y, M, and C toner amounts. The document size detection module 103
The original size is detected during pre-scanning and the platen color is erased (frame erased) during original scanning, and the color conversion module 104 uses a specific area according to the area signal input from the area image control module. The conversion of the color specified in is performed.
The UCR (Under Color Removal) & black generation module 105 generates an appropriate amount of K so as not to cause color turbidity, reduces Y, M, and C by an equal amount according to the amount of K, and The K signal and the signals after the lower colors of Y, M and C are removed are gated according to the signals of the color mode and the full color mode. The spatial filter 106 is
This is a non-linear digital filter equipped with a function to recover blur and a function to remove moiré, and TRC (Tone Reproducti
An on control (color tone correction control) module 107 performs density adjustment, contrast adjustment, negative / positive reversal, color balance adjustment and the like for improving reproduction. The reduction / enlargement processing module 108 performs reduction / enlargement processing in the main scanning direction, and reduction / enlargement processing in the sub-operation direction is performed by adjusting the scan speed of the document. The screen generator 109 converts the process color gradation toner signal into an on / off binarized toner signal and outputs the binarized toner signal. The binarized toner signal is output to the IOT 115 through the IOT interface module 110. The area image control module 111 has an area generation circuit and a switch matrix, and the edit control module has an area command memory 112, a color palette video switch circuit 113, a font buffer 114, etc. Is to do.

In the area image control module 311, seven rectangular areas and their priorities can be set in the area generation circuit, and area control information is set in the switch matrix corresponding to each area. The control information includes color modes such as color conversion and mono-color or full-color, modulation select information such as photographs and characters, TRC select information, screen generator select information, and the like, and the color masking module 102 and the color conversion module 104. , UCR module 105, spatial filter 10
6. Used to control the TRC module 107. The switch matrix can be set by software.

The edit control module is for reading a document such as a pie chart instead of a rectangle, and for enabling a coloring process that fills a specified area whose shape is not limited with a specified color. It is written in the memory, and the edit command for each point of the document is set by 4 bits by four plane memories.

In the IPS as described above, when converting the color separation signals (B, G, R signals) into the toner signals (Y, M, C, K signals), how to adjust the color balance, II
How to reproduce the color according to the reading characteristic of T and the output characteristic of IOT, how to adjust the balance of density and contrast, how to adjust edge emphasis, blur, and moire are problems.

Therefore, in the IPS, 8-bit data (256 gradations) is input to the END conversion module 101 for each of the B, G, and R color separation signals obtained by reading the document with the IIT100, and after the END conversion, Y, The toner signals of M, C, and K are converted (color masking). Then, the full color data processing is more efficient in erasing the original size and the frame, performing the color conversion processing, and then performing the undercolor removal and the black generation to select the toner signal X of the developing color. However, processing such as spatial filtering, color modulation, TRC, and expansion / reduction is performed by processing the development color data, reducing the processing amount compared to processing with full color data, and using only one conversion table. Along with setting it to / 3,
The number of types is increased to enhance adjustment flexibility, color reproducibility, gradation reproducibility, and definition reproducibility.

In the case of full color (4 colors), after the original size is detected by the prescan, the editing area is detected, and other original information is detected, for example, first, a copy cycle in which the toner signal X of the developing color is set to Y, Then, every time a copy cycle in which the toner signal X of the developing color is set to M is sequentially executed, 4
Signal processing is performed for each original scan.

[Problems to be Solved by the Invention]

However, the marker editing is greatly affected by the color distribution of the marker, its type, deterioration degree, marking strength, and paper quality. For example, a marker has a different color distribution depending on the manufacturer, and also a type such as a fluorescent type or a paint type. Also, even with the same marker,
The color tone when recognizing differs depending on the paper quality such as PPC paper, coated paper, and plain paper. Further, the marking density also differs depending on the density (deterioration degree) of the marker when the area is designated and the number of times of overwriting. Therefore, there is a problem that the threshold for marker recognition cannot be easily specified, and an edit error due to omission of recognition or a copy defect due to erroneous recognition occurs.

Fig. 9 shows an example of the color distribution according to the marker density when the paper quality is PPC paper, coated paper, or plain paper. Fig. 9 (a) shows Company A (opaque blue marker), FIG. 6B shows the ranges of Y, M, and C in 256 gradations of company B (translucent blue marker). As is clear from this figure, looking at Y, for example, in the coated paper of FIG.
34 to 48, the coated paper of FIG. Similarly, looking at C, the coated paper (low density) in FIG. 9B has a variation of 40 to 78, while the PPC paper (high density) has a variation of 116 to 158. The concentration is the deterioration degree of the marker,
Although it depends on the strength of the coating method and the presence or absence of overcoating, in the case of Company A, since it is an opaque marker, there is almost no effect on them. Therefore, if thresholds are set so that all of them fall within the recognition range, for example, the threshold of Y is 0 to 5
4, the threshold value of M is 0 to 50, and the threshold value of C is 40 to 255. But for this threshold, 40-50
Since any color is included in the range of, gray (highlight gray) is recognized in this range. That is, in a halftone image of a black-and-white original, the highlight gray portion of the original is erroneously recognized as a marker. As a result, the pick-up and drop miss of the marker occurs, and the defect in the highlight part becomes noticeable. That is, the image data is erroneously recognized as a marker, and recognition failure occurs at the marker portion. Therefore, on the one hand, the highlight part of the image data is mistakenly recognized as a marker and erased, or the region other than the editing region is edited, and on the other hand, the marker is partially erased and output (recorded). The problem arises. Therefore, if the upper limit part of Y and M and the lower limit part of C are compressed in order to eliminate the misidentification of the highlight gray, a pickup error occurs and, for example, a marker with a thin edge part is not recognized and is recorded in the main scan. The problem arises.

The present invention solves the above problems, and an object thereof is to reduce pick-up mistakes and drop mistakes of markers. Further, another object of the present invention is to obtain high recognition accuracy of markers even when markers having different color distributions are used.

[Means and Actions for Solving the Problems]

Therefore, according to the present invention, as shown in FIG. 1B, a document is read by pre-scanning, a marker color is detected from image data, edit information is set in a marker area, and a document is read by main scanning and image data is read from image data. In an image recording apparatus that detects a marker color, edits image data in the marker area, and records the image data, a plurality of marker color settings in which a marker color determination area is set with three sets of thresholds that correspond to three primary colors Means 13-16, a plurality of color detection means 17-20 for detecting the marker color from the image data by the respective judgment areas of the plurality of marker color setting means, a conversion color generating means 12 for generating a conversion color, a plurality of. Depending on whether or not any of the color detecting means has detected the marker color and whether it is a prescan or a main scan, the conversion color of the conversion color generating means is used for the image data. Marker processing means 11 and 17 for performing marker processing are provided. By doing so, it is possible to detect the marker color with a color distribution for each marker, and avoid misidentification of highlight gray. Moreover, even if there are various markers such as opaque markers, low-density markers, and high-density markers, the marker color judgment area is stratified by the type of the markers having a close distribution of the three primary colors, and the upper limit is set for each layer. It is possible to set the thresholds of the three zones corresponding to the three primary colors by using the above and lower limits as a set. Therefore, it is possible to set a determination area that does not include the highlight gray range.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of an image recording apparatus according to the present invention, FIG. 2 is a diagram showing an example of distribution of color distribution by marker type, and FIG. 3 is distribution by color distribution feature. It is a figure which shows an example.

In FIG. 1, IIT1, IPS2, and IOT3 correspond to those described above with reference to FIG. 8, respectively, and the control device 4 controls all of them. Color detection converter 6 in IPS2
Corresponds to the color conversion module shown in FIG. 8, and the editing unit 8 corresponds to the editing control module shown in FIG. Therefore, the image data processing unit 5 is composed of an END conversion module, a color masking module and a document size detection module, and the image data processing unit 7 is composed of a UCR & black generation module, a spatial filter module TRC module, a scaling processing module and the like. The edit memory 9 draws a closed area with a marker,
It draws an edit command in that area, and is composed of a plurality of plane memories as described above.

In the above-described configuration, the present invention provides, for example, an opaque marker as a threshold for marker recognition in the color detection conversion unit 6,
A threshold value is set individually for each layer such as a marker with low density, a marker with high density, and a marker with a close distribution of three primary colors, and the marker is recognized according to each of the threshold values. Is shown in FIG.

In FIG. 1 (b), the color designation registers 13 to 16 hold the upper and lower thresholds of the stratified markers, and the color detection circuits 17 to 20 designate the input image data for the respective colors. The marker is detected by comparing with the threshold value set in the register. The OR gate 21 outputs the outputs of the color detection circuits 17 to 20 to the selector 11 using the logical sum as a marker detection signal. The conversion color generation circuit 12 generates image data of colors to be converted and output, and generates image data for converting the marker to black and picking up the other parts to white at the time of picking up the marker. In addition, when the marker is dropped, image data for converting the marker to white is generated. The selector 11 switches and outputs the input image data and the image data generated by the conversion color generation circuit 12, and the switching content is controlled by the marker detection signal of the OR gate 21 output and the scan signal of prescan or main scan. To be done.

Switching of image data in the selector 11 is basically different between prescan and main scan. That is, in the pre-scan, the marker is picked up, and only the marker is blackened and written in the editing memory 9 of the editing unit 8. Therefore, when the marker detection signal output from the OR gate 21 is turned on, the conversion color generating circuit 12 generates the marker. Black image data is output, and when the marker detection signal is off, white image data generated by the conversion color generation circuit 12 is output. Therefore, the input image data is substantially the same as when it is blocked. On the other hand, in the main scan, since the marker is dropped, only the marker is white, and the others are through the input image data. Therefore, in this case, the white image data generated by the conversion color generation circuit 12 is output only when the marker detection signal output from the OR gate 21 is on, and the input image data is output as it is in other cases.

Next, the outline of the marker editing process will be described.

First, a plurality of marker recognition threshold values are set in the color detection conversion unit 6, and black is set when a marker is detected, and white is set (a color conversion) when no marker is detected. Then, in the prescan, the image data processing unit 5 performs γ correction and color correction processing on the signal read by the IIT1, and the color detection conversion unit 6 compares the signals with a threshold value. Then, the pixel recognized as the marker is stored in the edit memory 9
To form a closed area. Before the main scan starts, a command is drawn in this closed area according to any of trimming, masking, color painting, and mesh, and at the same time, the marker conversion color of the color detection conversion unit 6 is set to white. Then, in the main scan, the image data processing unit 5 performs the marker drop processing from the image data that has undergone the γ correction and the color correction processing, and performs the editing specified by the command on the image data in the closed area.

FIG. 2 is a diagram showing an example of color distribution of 21 types of markers having different conditions such as manufacturer, marker type, paper quality, etc., and A shows a range necessary to cover all the distributions. In this range, the shaded area cannot be recognized as a highlight gray area. Further, FIG. 3 is a diagram showing an example of dispersion for each color distribution feature. When the threshold is set with stratification as (a) to (d), for example, for the opaque marker in FIG. 3 (a), Y = 0 to 60 M = 0 to 60 C = 85 to 255 YM For the low figure (b), Y = 0 to 20 M = 0 to 25 C = 40 to 255 For the high concentration figure (c), Y = 0 to 55 M = 0 55C = 70 to 255 For YCM distributions in which the distributions of YCM are close to each other, it is possible to set Y = 20 to 40 M = 10 to 45 C = 50 to 255.

As is clear from the above threshold setting example, each of the thresholds set for each layer has a value such that highlight gray is not included in the recognition range. However, whatever marker is used, since it falls within the range of any of these thresholds, the marker recognition signal excluding highlight gray can be extracted by logically adding the recognition outputs of the respective thresholds. .

Next, a configuration example of a color conversion circuit that can be used in the color detection conversion circuit of the present invention will be shown.

FIG. 4 is a diagram showing a circuit configuration of a color conversion LSI, FIG. 5 is a diagram showing a configuration of a color detection unit, FIG. 6 is a diagram showing a circuit configuration of a color conversion unit, and FIG. 7 is a configuration of a priority circuit. FIG.

The color conversion circuit shown in FIG.
The comparison color (converted color), the conversion color, and the conversion flag are set from U), the comparison color is detected by the three colors Y, M, and C, and the setting content of the conversion flag depends on whether the matching color conversion is a non-matching color conversion. Performs conversion processing to conversion color. That is, normally, the color of the input image data is output as it is, and in the case of matching color conversion, the conversion color is output when a matching signal with the comparison color is obtained,
In the case of mismatch color conversion, on the contrary, if a match signal with the comparison color is not obtained, the conversion color is output. The comparison color is given with a constant value and a width with each value of Y, M, and C, and a coincidence signal is generated on the condition that each value is within the range. The conversion colors can be set up to four colors by matching color conversion or non-matching color conversion.

In FIG. 4, the CPU interface 31 has a register for selecting and setting matching color conversion / mismatching color conversion in the control register for the conversion color. The selection signal for matching color conversion / mismatching color conversion is ICCA, ICCB, ICCC, ICCD
In these bits, "1" is set when the matching color conversion is executed, and "0" is set when the unmatching color conversion is executed. Four color detectors 33A to 33D,
The color conversion units 34A to 34D have internal registers as shown in FIG. 5 and FIG. 6, respectively, so that the control device (CPU) can individually set the color to be compared and the color to be converted. ing.

The color detection units 33A to 33D are registers in which lower limit values are set for the three colors Y, M, and C, as shown in FIG.
41, 43, 45 and registers 42, 44, 46 to which the upper limit value is set
And the comparison color is set from the CPU. The comparators 47 to 52 compare these with the input image data, and the AND gate circuit network 53 outputs the coincidence detection signal of "1" on condition that the three colors are between the upper limit value and the lower limit value. Is configured.

Each of the color conversion units 34A to 34D has registers 61 to 63 for holding Y, M, and C conversion colors, as shown in FIG.
The data WR is written by the write signal NWE and read by the read signal NOE. Then, the selection signal CLSEL
The AND gate 64 is controlled to output the converted color.

As shown in FIG. 7, the priority circuit 35 inputs the color detection signals IDTA, IDTB, IDTC, IDTD and the selection signals ICCA, ICCB, ICCC, ICCD for matching color conversion / non-matching color conversion to the EXOR circuit 65 and outputs either of them. AND gate when only the signal of is "1"
At 66, the conversion color control signals CHAE, CHBE, CHCE, CHDE are ANDed, and at the priority processing gate circuit 67, priority processing is performed and any one of the conversion processing signals CLSELA, BCOT, CCOT, and DCOT is transmitted in the priority order. The conversion color control signals CHAE, CHBE, CHCE, and CHDE are assigned 4 bits of the commands F15 + to F0 + generated by the area designating circuit.

The video data selector 36 has conversion processing signals CLSELA and BCO.
When any of T, CCOT, and DCOT is "0", the input image data THY, THM, THC is output as it is, and when any of them is "1", the corresponding color is used instead of the input image data. Outputs (AY, AM, AC), (BY, BM, B) of converters 34A to 34D
C), (CY, CM, CC), (DY, DM, DC) are selected and output.

The setting of the internal register in each of the color detection units 33A to 33D and the color conversion units 34A to 34D is performed by the control device through the CPU interface 31.

As described above, when the color conversion control signal is "1" (high level), color conversion processing becomes possible and "0" (low level).
In the case of, the input image data is output as it is without performing color conversion processing. Then, in the color conversion processing, when the detection signal becomes "1" in the coincidence conversion mode in which the selection signal for coincidence color conversion / disagreement color conversion is "1", the conversion image data is output, and the selection of coincidence color conversion / disagreement color conversion is made. The converted image data in which the detection signal is "0" is output in the mismatch conversion mode in which the signal is "0". In this case, when the color conversion processes overlap at the same time, the converted image data with the highest priority is selected and output according to the priority.

For example, the color A and color B are set to match color conversion, and the color C and color D are set to mismatch color conversion.
Area designation circuit command F15 + for AE, CHBE, CHCE, CHDE
It is assumed that ~ F12 + is assigned. Then, when the commands F15 + to F12 + are "0010", only the conversion color control signal CHCE becomes "1" and the others become "0", and the color conversion processing in that area only performs the C color mismatch conversion. It will be. When the command F15 + to F12 + is "1111", the color conversion processing in that area is to perform the matching color conversion of the A color and the B color and the non-matching color conversion of the C color and the D color. When the commands F15 + to F12 + are "1001", the color conversion processing in that area performs the matching color conversion of the A color and the non-matching color conversion of the C color. In this case as well, there are cases where the coincidence signals are output simultaneously for the A and C colors, one of the coincidence signals is output, and the coincidence signal is not output for both.

Next, the operation of each combination will be described.

First, as the setting state, the color detection units 33A and 33D registers
The lower limit value of each color is stored in 41, 43, and 45, and the registers 42 and 4
The upper limit value of each color is written in 4 and 46, and the color conversion unit 3
Converted colors of Y, M, and C are written in the registers 61 to 63 of 4A and 34D, respectively. The selection signal ICCA for matching color conversion / mismatching color conversion is set to "1" and ICCD is set to "0".

Therefore, for example, in the area shown in FIG. 44, the commands F15 + to F12
If + becomes "1001", the conversion color control signals CHAE and CHDE become "1" and CHBE and CHCE become "0" in response to this command. Then, the input image data becomes
The detection signals IDTA and IDTD of the color detection units 33A and 33D are both "1", that is, when the input image data is between the upper limit value and the lower limit value set in the registers of 33A and 33D Assuming that the upper limit value and the lower limit value are both entered, only the uppermost output of the AND gate 66 in FIG. 7 becomes "1", and the conversion processing signal CLSELA
Becomes "1". Therefore, the converted color signals AY, AM, AC are output from the color conversion section 34A, and the converted color signals AY, AM, AC are selected by the video data selector 36 and sent out.

Conversely, if the detection signals IDTA and IDTD of the color detectors 33A and 33D are both "0", that is, if the input image data does not fall between the upper limit value and the lower limit value, the AND gate of FIG.
Only the bottom output of 66 is "1". Then, since the outputs of the AND gate 66 other than the bottom are still “0”, these inversion signals are input to the most AND gate of the priority processing gate circuit 67 through the inversion circuit. Only the conversion processing signal DCOT for which the AND condition of the gate is satisfied becomes "1". Therefore, the color conversion unit 34
The converted color signals DY, DM, DC are output from D, and the converted color signals DY, DM, DC are selected by the video data selector 36 and sent.

When the detection signal IDTA of the color detection unit 33A is "1" and the detection signal IDTD of the color detection unit 33D is "0", the top and bottom outputs of the AND gate 66 in FIG. 7 are output. Are both "1"
become. In such a case, as is apparent from the circuit configuration shown in FIG. 7, in the priority processing gate circuit 67, the signal with the higher priority is input to the lower AND gate through the inverting circuit, so that the AND gate 66 When the top becomes "1", one input of the AND gates lower than that becomes "0", and only the conversion processing signal CLSELA becomes "1". Therefore, as in the case of,
Y, AM and AC are output, and the converted color signals AY, AM and AC are selected by the video data selector 36 and transmitted.

Contrary to the above example, when the detection signal IDTA of the color detection unit 33A is "0" and the detection signal IDTD of the color detection unit 33D is "1", all the outputs of the AND gate 66 in FIG. It becomes "0". Therefore, the conversion processing signals CLSELA, BCOT, CCOT, DC
Since all OTs are “0” and the converted color signals are not output from the color conversion units 34A to 34D, the video data selector 36
From the image input data, the input image data THY, THM, THC are sent as they are.

The color conversion circuit is configured such that matching color conversion / non-matching color conversion can be performed independently by setting a conversion color, a color to be converted, and a conversion flag. Therefore, in the marker edit, when the conversion color is set to K and the conversion target color is set to the threshold value of the marker during the prescan, and the conversion flag is set to the coincidence conversion, the marker is converted to K and output. Therefore, this may be written in the editing memory 9 by the editing unit 8 shown in FIG. 1 and the editing command may be set in the closed area.
In this case, the image data other than the marker is cut by a color conversion circuit (for example, the video data selector 36) or is converted into a W in which Y, M, and C are 0 by color conversion inconsistent with the marker.
It may be configured to convert to. Then, when the conversion color is changed from K to W during the main scan, the marker is converted to white and the marker is erased. Therefore, the image data of the original in which the marker is erased is output, and the editing unit performs the editing process set in the editing memory on the image data of the marker area.

〔The invention's effect〕

As is clear from the above description, according to the present invention, the threshold value for editing the marker is set for each layer corresponding to the color distribution such as the type of the marker, and the logical sum of the recognition outputs thereof is used. The recognition accuracy of can be improved and the range of recognizable markers can be expanded. Therefore, it is possible to prevent misidentification even with respect to the difference in paper quality, the manufacturer or type of the marker used, and the like. Moreover, it is possible to eliminate the defect of marker editing with a simple configuration without performing special processing for preventing misidentification.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of an image recording apparatus according to the present invention, FIG. 2 is a diagram showing an example of color distribution by marker type, and FIG. 3 is an example of dispersion by color distribution feature. FIG. 4, FIG. 4 is a diagram showing a circuit configuration of a color conversion LSI, FIG. 5 is a diagram showing a configuration of a color detection unit, FIG. 6 is a diagram showing a circuit configuration of a color conversion unit, and FIG. 7 is a priority circuit. FIG. 8 is a diagram showing an example of the configuration of an image data processing system of a digital color copying machine, and FIG. 9 is a diagram showing an example of color distribution according to the paper quality and the darkness of the markers. 1 ... IIT (image input terminal), 2 ... IPS (image processing system), 3 ... IOT (image output terminal), 4 ... control device, 5 and 7 ... image data processing unit, 6 ... color Detection conversion unit, 8 ... Editing unit, 9 ... Editing memory, 11 ... Selector, 12 ... Conversion color generation circuit, 13 to 16
...... Color designation register, 17 to 20 ...... Color detection circuit, 21 ...... Or gate.

Claims (2)

[Claims] 1. A document is read by pre-scanning, a marker color is detected from image data, edit information is set in a marker area, a document is scanned by main scanning, a marker color is detected from the image data, and image data in the marker area is detected. In an image recording apparatus for editing and recording, a plurality of marker color setting means for setting a marker color judgment area with three sets of thresholds corresponding to three primary colors, with a combination of an upper limit and a lower limit, and a plurality of marker color settings from image data A plurality of color detection means for detecting the marker color by each determination region of the means,
The converted color generating means for generating the converted color and the converted color of the converted color generating means are used for the image data depending on whether or not any of the plurality of color detecting means has detected the marker color and whether it is a pre-scan or a main scan. An image recording apparatus comprising: a marker processing unit that performs marker processing. 2. The marker processing means, as the marker processing, converts the image data in which the marker color has been detected by the prescan into a specific color and the image data in which the marker color has not been detected into white data, and performs the main scan. The image recording apparatus according to claim 1, wherein the image data in which the marker color is detected is converted into white data, and the image data in which the marker color is not detected is output as it is.