JPH0844865A - Image processor - Google Patents

Abstract

PURPOSE:To prevent interference from being generated at the border of areas when performing plural kinds of image processing while sharing a line memory. CONSTITUTION:A change point detecting part 400 detects the border (change point) of areas designated on an original or a job sheet, replaces the data of the change point with '0' and outputs the data of the other areas to a line memory part 500 as they are. At an extracting part 100, specified seven colors such as G, Y, R, P (purple) and B, for example, are extracted from a luminance signal L* and color difference signals a* and b* and a three-bit signal is outputted. A contour processing part 200 and a shadow processing part 300 respectively generate the contour data and shadow data of designated areas from the three-bit signal while sharing the line memory part 500.

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 performing image processing such as shadowing.

[0002]

2. Description of the Related Art Conventionally, in the case of performing contour processing and shadowing processing, for example, in Japanese Patent Laid-Open No. 4-218879, the contour processing line memory and the shadowing processing line memory are shared, and the line memory of the line memory is processed according to the processing. A method of changing the size has been proposed.

Another device is, for example, Japanese Patent Laid-Open No. 6-0.
Japanese Patent Laid-Open No. 54178 proposes a method of reducing the capacity of the line memory by binarizing each RGB data and coding it into a total of 3 bits when YMCK is shaded from RGB data.

As a color image processing apparatus for performing a shadowing process, for example, a method using R, G, B data has been proposed as disclosed in Japanese Patent Laid-Open No. 3-276964.

[0005]

However, in the method disclosed in Japanese Unexamined Patent Publication No. 3-276964, the line memory is shared and two or more different image processes are performed, so that interference occurs at the boundary between two adjacent regions. There is a problem of doing.

Further, in the method disclosed in Japanese Patent Laid-Open No. 6-054178, each RGB data is binarized and coded into a total of 3 bits. Therefore, when more colors are extracted from the original image, the line memory is used. There is a problem that the capacity increases.

In view of the above-mentioned conventional problems, the present invention provides an image processing apparatus capable of preventing interference from occurring at a boundary between regions when a plurality of different image processes are performed by sharing a line memory. The purpose is to

Another object of the present invention is to provide an image processing apparatus capable of reducing the capacity of a line memory when a large number of types of image data are extracted from an original image and subjected to image processing.

The present invention also provides an image processing apparatus capable of preventing interference from occurring for each type of image when a large number of types of image data are extracted from an original image and subjected to image processing. With the goal.

[0010]

In order to achieve the above object, a first means detects a boundary between a line memory for storing designated area data for image processing of an image and a designated area for image data, and It is characterized by comprising a clear means for clearing the line memory, and a plurality of image processing means for sharing the line memory and performing image processing on each designated area of image data.

The second means is extraction means for extracting a plurality of types of image data from the original image, coding means for encoding the types of image data extracted by the extraction means, and designation for image processing of the image. A line memory for storing the area data and the type code of the image data encoded by the encoding means, an expanding means for expanding the type code based on the designated area data stored in the line memory, and the expansion Image processing means for performing image processing based on the data developed by the means.

A third means is an extraction means for extracting a plurality of types of image data from an original image, a coding means for coding the types of image data extracted by the extraction means, and a designation for performing image processing on the image. A line memory for storing the area data and the type code of the image data encoded by the encoding means, and a logical operation of the type code so as not to interfere with each type of image in the designated area stored in the line memory. And image processing means for performing image processing according to the above.

A fourth means is extraction means for extracting a plurality of types of image data from an original image, coding means for coding the types of image data extracted by the extraction means, and designation for image processing of the image. A line memory for storing the area data and the type code of the image data encoded by the encoding means, an expanding means for expanding the type code based on the designated area data stored in the line memory, and the expansion First image processing means for performing image processing on the basis of the data developed by the means, and image processing by logically operating the type code so as not to interfere with each type of image in the designated area stored in the line memory. And a second image processing means for performing.

A fifth means is characterized in that the second to fourth means includes a clear means for detecting the boundary of the designated area of the image data and clearing the line memory at the boundary.

A sixth means is characterized in that in the first to fifth means, the image data is luminance data and color difference data of a color image.

A seventh means is characterized in that the luminance data and the color difference data in the sixth means are data of a color coordinate space.

[0017]

According to the first means, when the line memory for storing the designated area data for image processing the image is shared and each designated area of the image data is subjected to a plurality of different image processing, the image data is designated by the clear means. A region boundary is detected and the line memory is cleared at the boundary. Therefore,
When the line memory is shared and a plurality of different image processings are performed by a plurality of image processing means, it is possible to prevent the occurrence of interference at the boundary of regions by the encoding means.

In the second means, plural kinds of image data are extracted from the original image by the extracting means, the kinds are coded by the coding means and stored in the line memory, and the kind codes are expanded based on the expanding means. Image processing is performed by the image processing means based on the expanded data. Therefore, the capacity of the line memory can be reduced when a large number of types of image data are extracted from the original image and subjected to image processing.

In the third means, a plurality of types of image data are extracted from the original image by the extraction means, the types are encoded by the encoding means and stored in the line memory, and the image processing means interferes with each other for each type of image. Image processing is performed by logically operating the type code so as not to do so. Therefore, when a large number of types of image data are extracted from the original image and subjected to image processing, it is possible to prevent interference from occurring for each type of image.

In the fourth means, plural kinds of image data are extracted from the original image by the extracting means, the kinds are coded by the coding means and stored in the line memory, and the kind codes are expanded based on the expanding means. The first image processing means performs image processing on the basis of the expanded data, and the second image processing means logically determines the type code so as not to interfere with each type of image in the designated area stored in the line memory. Calculate This makes it possible to reduce the capacity of the line memory when a large number of types of image data are extracted from the original image and perform image processing, and it is possible to prevent interference from occurring for each type of image.

In the fifth means, the clear means detects the boundary of the designated area of the image data in the second to fourth means, and the line memory is cleared at the boundary. Therefore, when the line memory is shared and a plurality of different image processes are performed, it is possible to prevent interference from occurring at the boundary between regions, and when a large number of image data are extracted from the original image and the image process is performed. In addition, it is possible to reduce the capacity of the line memory, and it is possible to prevent the occurrence of interference for each type of image.

In the sixth means, since the image processing is performed based on the luminance data and color difference data of the color image, it is possible to easily perform the image processing using only the luminance data when the color image is made into black and white.

In the seventh means, since the luminance data and the color difference data are data in the color coordinate space, it is possible to easily perform image processing using only the luminance data when making a color image into black and white.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a block diagram showing a processing unit which is a main part of an embodiment of an image processing apparatus according to the present invention, FIG. 2 is a block diagram showing a copying machine including the processing unit shown in FIG. 1, and FIG. FIG. 5 is a block diagram showing a color image processing apparatus including a processing unit, FIG. 4 is an explanatory diagram showing a region detected by the change point detection unit of FIG. 1, and FIG.
1 is an explanatory view showing the boundaries of the areas detected by the change point detection unit of FIG. 1, FIGS. 6 and 7 are block diagrams showing the line memory unit of FIG. 1 in detail, and FIG. 8 shows the extraction unit of FIG. 1 in detail. FIG. 9 is a block diagram shown in FIG.
10 is a block diagram showing the contour processing section of FIG. 1 in detail, and FIG. 11 is a block diagram showing the hollow processing section of FIG. 10 in detail.
FIG. 12 is an explanatory diagram showing the thinning data, the contour data, and the deviation data by the contour processing unit of FIG.

FIG. 13 is a block diagram showing the shadow processing section of FIG. 1 in detail, FIG. 14 is a block diagram showing the shadow generation section of FIG. 13 in detail, and FIG. 15 shows the operation of the shadow generation section of FIG. Explanatory diagram, FIG. 16 is an explanatory diagram showing a solid shadow, FIG. 17 is an explanatory diagram showing a plain shadow, FIGS. 18 and 19 are explanatory diagrams showing processing at the time of shadow generation, and FIG. Block diagram showing,
FIG. 21 is an explanatory diagram showing the operation of the embodiment.

First, the structure of the copying machine will be described with reference to FIG. A document or a job sheet indicating the area and contents of image processing of the document is guided to the document reading unit 2 by the document feeding unit 1 and read by the document feeding unit 1, and is discharged from the document reading unit 2 after reading. Document reading means 2
The image data read by is output to the color image processing apparatus (image processing means 3) shown in detail in FIG. 3 as R, G, and B digital data, and is corrected and processed.

The image processed by the image processing means 3 is recorded on a sheet by the image recording means (printer) 4,
It is displayed by the image display means 5. The operating means 6 allows the operator to input keys, display the status of the copying machine, and
The image display means 5 displays guidance or the like for giving an operation instruction by the operation means 6.

Next, the color image processing apparatus will be described with reference to FIG. First, the RGB filter 11 performs MTF correction on each digital data of R, G, and B output from the document reading unit 2 in order to correct blurring of the optical system of the document reading unit 2, and then the RGBγ correction unit 12 performs R correction. ,
Gray balance and density correction of digital data of G and B are performed. The RGB → L ^* a ^* b ^* conversion unit 13 converts the R, G, and B data from the RGBγ correction unit 12 into a luminance signal L ^* of an orthogonal conversion system (uniform perceptual color space CIE1976 (L ^* a ^* b ^* )). , The first color difference signal a ^* and the second color difference signal b ^* are converted, and the subsequent scaling unit 14 enlarges or reduces the data of L ^* a ^* b ^{* in} the main scanning direction. Note that the scaling in the sub-scanning direction is performed by the document reading unit 2.

Based on the luminance signal L ^* , the processing section 15 performs processing such as shading, hollowing, half-shading, etc. by the color difference signals a ^* and b ^* , and deformation processing such as mirror and italic, and the following color conversion section. 16 performs or the like converts the color difference signal a ^*, the b ^* red to blue, signals L ^*, a ^*, a process such as under-color for adding a specific color by b ^*.

The L ^* a ^* b ^* → YMCK conversion unit 17 determines an arbitrary one of Y, M, C, and K, for example, K (black) based on the L ^* , a ^* , and b ^* data from the color conversion unit 16. ) Is output, UCR (background removal) processing is performed. Note that Y, M, C, and K can be output to obtain a full-color image by reading the original four times by the original reading unit 2, and in the case of ^monocolor, only the luminance signal L ^* can be used to obtain the K value. Output the data.

The YMCK γ correction unit 18 performs γ correction according to the density characteristic of the printer 4, and then the YMCK filter 19
Performs processing according to the frequency characteristics of the printer 4. The gradation processing unit 20 performs gradation processing such as multi-value dither processing and error diffusion according to the gradation characteristics of the printer 4, and then the erase unit 2
1 deletes unnecessary images other than valid image data and outputs them to the printer 4.

The area unit 22 is provided with four 1-bit bit map memories, and the area data pre-written in the four bit map memories are processed by the processing unit 15 and the color conversion unit according to the processing contents during the copy operation. Part 16, L ^* a ^* b ^* → Y
It is applied to the MCK conversion unit 17, the YMCKγ correction unit 18, the YMCK filter 19, the gradation processing unit 20, and the erase unit 21. The output signal of the erase section 21 is also stored in the area section 22 so that it can be combined.

As an example (see FIG. 9), the area section 22 outputs the following 3-bit area numbers "0" to "7".

Area number = "0": no processing Area number = "1": contouring + padding area number = "2": contouring.

Area number = "3": flat shadow area area number = "4": solid shadow area number = "5": contouring + padding area number = "6": contour + solid shadow area number = “7”: Contouring + flat shadowing The separation unit 23 performs halftone dot determination based on the luminance signal L ^* to determine the color regions of the color difference signals a ^* and b ^* , and determines the determination result of the character region or the photo region. Processing unit 15, color conversion unit 16, L ^* a ^* b
^* → YMCK conversion unit 17, YMCKγ correction unit 18, YM
It is applied to the CK filter 19 and the gradation processing unit 20. Each of the processing units 15 to 20 switches to processing suitable for this character area or photo area.

The document size detecting unit 24 detects the size of the document in order to detect the maximum value max and the minimum value mi in the main scanning direction.
An original size is detected by detecting a white background area of n and the maximum value max and the minimum value min in the sub-scanning direction. The pressure plate that presses the document in the document reading unit 2 has a value equal to or greater than the white background of the coloring member and the mirror surface member. The memory unit 25 can store the brightness data L ^* of a specific small area of the document, and the interface (I / F) 26 is used to connect the external computer or the like between the scaling unit 14 and the processing unit 15. To be Microprocessor (MPU) 27 is each block 1
By controlling 1 to 26, control as described later is performed.

The processing unit 15 shown in FIG. 1 includes an extracting unit 100 shown in detail in FIGS. 8 and 9, a contour processing unit 200 shown in detail in FIGS. 10 to 12, and a shadow processing unit shown in detail in FIGS. 13 to 19. 300, a change point detector 400 shown in detail in FIGS. 4 and 5, and a line memory 500 shown in FIGS. 6 and 7.
20 and FIG. 21, there is a synthesizing unit 600 in detail.

As shown in FIG. 4, the changing point detecting section 400 is a boundary (changing point) of an area designated on a document or a job sheet.
Is detected, the data of the change point is replaced with “0” as shown in FIG. 5, and the data of the other area is output to the line memory 500 as it is. The line memory 500 is shown in FIG.
And a circuit 207a having three configurations shown in FIG.
And a line memory 207b. The circuit 207a outputs 8-bit parallel signals M0 to M7 according to the output signal of the change point detection unit 400. In addition, the shadow FIFO in and out as input / output signals are connected to the shadow processing unit 300,
The contour FIFOs in and out are connected to the contour processing unit 200.

The line memory 207b has a capacity for accumulating data for n lines, and is, for example, NEC, μPD42.
505C is used. When the signals M0 to M7 are "0", no processing is performed and all 0s are selected as the input data of the line memory 207b. When the signals M0 to M7 are "1" or "2", only the contour processing unit 200 performs the processing, only the contour FIFOin is input to the line memory 207b, and the line memory 20 is used as the contour FIFOout.
7b data is output as it is, and the shadow FIF is used.
All 0s are output as Oout.

When the signals M0 to M7 are "3" or "4", only the shadow processing section 300 performs the processing, and the shadow FIFO is used.
Only in is input to the line memory 207b, and the shadow FIF
The data of the line memory 207b is directly output as Oout, and all 0s are output as the contour FIFOout. When the signals M0 to M7 are “5”, “6”, or “7”, the contour processing section 200 and the shadow processing section 30.
Both of them perform processing, and the line memory 207b is divided into two and used half by half.

As shown in detail in FIG. 8, the extraction unit 100 specifies, for example, G, Y, R, P (purple), B, etc. from the luminance signal L ^* and the first and second color difference signals a ^* and b ^*. Of 7
In order to extract the color, the color extraction units 101 to 107 output extraction signals based on the logic as shown in FIG. The output signals of the color extracting units 101 to 107 are inverted by the inverters 111 to 117, the encoding unit 120 obtains a 3-bit signal, and the signal inverters 121 to 123 of the respective bits invert the output signals to obtain the color code. The signals "0" to "2" are output.

When the color code signals "0" to "2" are all 0, it means that there is no extraction area, and the coding unit 120 is, for example, LS148 of TI (Texas Instruments). Or the equivalent can be used.

Next, referring to FIG. 10, the contour processing section 200
Will be described in detail. Contour FiFo outputs out0 to 2 of the line memory unit 500 (4 bits each for a total of 1
(2 bits) are simultaneously input to the code expansion units 202 to 205, and at the same time, they are shifted and the contour FiFo input in0 to in0 is input.
2 (4 bits each, total 12 bits). The MSBs of the FiFo outputs out0 to 2 are not input to the FiFo inputs in0 to 2.

Color code signal "0" from the extraction unit 100
“2” is input to the code expansion unit 201 and at the same time Fi
It is input as each LSB of Fo inputs in0 to 2. Here, the code expansion units 201 to 206 are LS138 of TI Company.
Alternatively, the code expansion unit 20 can be used.
1 is expanded into 7-bit data (Y1 to Y7) of the current line output by the color extracting units 101 to 107 shown in FIG.
Similarly, the code expansion unit 202 expands to 1 line before, the code expansion unit 203 expands to 2 lines before, the code expansion unit 204 expands to 3 lines before, and the code expansion unit 205 expands to 4 lines before to 7-bit data (Y1 to Y7). .

The 7-bit data expanded by the code expanding units 201 to 205 are input to the inside-out processing units 211 to 217 for each bit. This hollowing processing unit 21
1 to 217 are color extracting units 101 to 10 shown in FIG.
Corresponding to No. 7, as shown in detail in FIG. 11, the hollowing process is independently performed for each extracted color.

Outputs ou of the hollowing processing units 211 to 217
t0 is applied to the code unit 221 shown in FIG. 10, coded into 3-bit color code signals “0” to “2”, and output as contour data “0” to “2” by the gates 231 to 233. On the other hand, the hollowing processing units 211 to 21
The respective outputs out1 of 7 are applied to the code section 222, coded into 3-bit color code signals "0" to "2", and output as shift data "0" to "2" by the gates 241 to 243.

A 3-bit area signal from the area section 22 shown in FIG. 3 is input to the code expansion section 206. When the area signal is "0", output data (contour data "0" to "2") is input.
The deviation data “0” to “2”) becomes “H” and becomes “0”.
Otherwise, the output data is inverted.

Each of the hollowing processing units 211 to 217 has the same structure, and the structure is shown in FIG. The flip-flop (FF) operates with the pixel clock, and the selector 251
Input A is 3 × 3 thinned data, and Input B is 5 ×
It is data of 5 reduction. The input A of the selector 252 is 3 × 3 shift correction data, and the input B is 5 × 5 shift correction data. The selectors 251 and 252 both select the 3 × 3 data of the input A when the selection signal S is “L”, and the 5 × of the input B when the selection signal S is “H”.
5 data are selected and output to the output terminal Y.

The data selected by the selectors 251 and 252 is supplied via the gate 253 to the contour data (output out).
The data output as 0) and selected by the selector 252 is output in negative logic as shift data (output out1) (illustrated inverter 254). The code units 221 and 222 shown in FIG. 10 can use LS148 or the equivalent of TI Co. as in the code unit 120 shown in FIG. 8. In this case, the negative logic outputs NOR gates 231 to 2 are used.
33, 241-243 output in positive logic. 12B to 12D respectively show thinning data, contour data, and deviation data for the original image shown in FIG. 12A, all of which are processed from the original image toward the lower right.

Next, the shadow processing section 300 will be described in detail with reference to FIG. First, the code expanding unit 301 expands the area signal in the same manner as the code expanding unit 206 shown in FIG. 10, and generates the selection signals of the selector 302 and the shadow generating units 311 to 313. The control signal G of the selector 302 is “H”,
When S is "L", select the deviation data "0" to "2",
Code data “0” to “2” when both G and S are “H”
Is selected and the output Y is always "L" when G is "L".

Each of the shadow generators 311 to 313 has the same configuration, and the configuration is shown in FIG. 13 and 14
In each of the shadow generation units 311 to 313, the shadow FIOs 0 to 2 that are the respective inputs F0 are the shadow FIOs that are the respective outputs F1.
The data is one line before IFOin0 to IFO2.

Also, the inputs M, S0, S of the shadow generation unit 311
1 is a bit “0” of the output Y of the selector 302,
“1” and “2”, and inputs M and S of the shadow generation unit 312
0 and S1 are bits “1”, “2”, and “0” of the output Y of the selector 302, and inputs M, S0, and S1 of the shadow generation unit 313 are bit “2” of the output Y of the selector 302, respectively. They are "0" and "1". Furthermore, the shadow generation unit 3
Each selection signal SEL of 11 to 313 is “H” when the shadow is flat,
When it is a three-dimensional shadow, it becomes "L", and shadow data "0" to "2" is output from each output Q.

In FIG. 14, the shadow cast width register 320
Is set beforehand with 4-bit shadow width data. All 1
The output of each bit of the register 321 is "H",
The output of each bit of the all 0 registers 322a and 322b is all "L". Selectors 323 to 325, 327
Selects the input A when the control signal S is "L", and selects the input B when the control signal S is "H". The selector 324 selects 1 bit of the 4-bit input C (above F0) based on the 2-bit control signal S from the shadow width register 320.

The adder 328 outputs all 1 (= input A) + input F0 (= input B) as the output Σ, and when the carry occurs, the output C4 becomes “H”. Comparator 3
29 is an output (/ P = 0) when F0 (= input P) and all 0 (= input Q) are equal (“/” indicates an inversion symbol).
Becomes "L". The FF 330 is the output Y of the selector 325.
Is stored for one pixel by the pixel clock and is output as a signal F1. The bit shifter 331 doubles the input F0, adds +1 when the input M is “H”, and does not add when the input M is “L”.

FIG. 15 shows the operation of this circuit. In the case of a solid shadow (SEL = L), the solid shadow as shown in FIG. 16 is output, and in the case of a flat shadow (SEL = H), it is shown in FIG. The flat shadow as shown is output. Here, if the shadow generation unit 311
When the input of ˜313 generates only the three-dimensional shadows of Y, M, and C by the input of M alone as shown in FIG. 18, adjacent color components are superimposed and interfere with each other. Therefore, the inputs M, S0, and S1 can be used to generate a three-dimensional shadow so that adjacent color components do not interfere with each other, as shown in FIG.

20 and 21 show the structure and operation of the combining unit 600. The extraction unit 100 extracts a color to be shaded, and a logical product signal of the extracted data and the shadow data from the shadow processing unit 300 is applied to the synthesis control unit 601. The synthesis control unit 601 also receives the code data from the extraction unit 100, the contour data and the shift data from the contour processing unit 200, and the area data from the area unit 22, and outputs A,
B selects the selector 602, and output S selects the selector 603.
The image data L ^* , a ^* , b ^* , contour color data, shadowing color data, padding data, and erase data are selected by controlling.

The original image data shown in FIG. 21A is the data extracted by the extraction unit 100.
In (b) to (h), data other than the original image data is data applied to the synthesis control unit 601.

(A) First, when the area signal is "0", the outputs A, B and S of the synthesis control unit 601 are all "L", and the selectors 602 and 603 have image data L ^* , a ^* , and
Select b ^* as it is and output.

(B) When the area signal is "1" and the contour data is "H", the outputs A, B and S are "H", "L" and "L", respectively, and the contour color data is When the contour data is selected and the contour data is “L”, outputs A, B,
S becomes "H", "H", and "L", respectively, and the embedded data is selected. At other times, the outputs A, B and S are "L", "L" and "H", respectively, and erase data is selected.

(C) When the area signal is "2", when the contour data is "L" and the shift data is "H", outputs A, B and S are all "L", and the image data L ^* ,
a ^* and b ^* are selected. At other times, it is the same as the above case (b).

(D) When the area signal is "3" and the shadow data is "H", the outputs A, B and S are "L", "H" and "L", respectively, and the shadowing color data is Image data L ^* , a ^* , b ^* are selected, and at other times ^.
Is selected.

(E) When the area signal is "4", it is the same as in the case of (d).

(F) When the area signal is "5", when the contour data is "H", the outputs A, B and S are "H", "L" and "L", respectively, and the contour color data is To be selected. The contour data is "L" and the deviation data is "H".
In the case of, the outputs A, B and S are "H", "H" and "L", and the padding data is selected. Further, when the shadow data is "H", the outputs A, B and S are "L" respectively.
The data becomes "H" and "L", the shadowing color data is selected, and the erase data is selected at other times.

(G) When the area signal is "6", when the contour data is "L" and the shift data is "H", the outputs A, B and S are all "L", and the image data L ^* ,
a ^* and b ^* are selected. At other times, it is the same as the case (f) above.

(H) When the region signal is "7", it is the same as in the case of (g) above.

In the above embodiment, the data L ^* , a ^* , b ^* of the orthogonal transformation system are described as an example, but it goes without saying that the invention can be applied to other image data.
Further, when processing monochrome data or a single color instead of a color image, the hardware can be simplified by performing color extraction only with the luminance data L ^* . Also, although the area signal has been described as fixed, it need not be fixed.

Further, the contour color data, the shadowing color data, and the embedding color data of the synthesizing section 600 may have different values for each area, and by making the embedding data and the erase data the same in FIG. The inside and outside of the contour can have the same color. Further, by separately configuring the extraction unit (character) for shadowing and the extraction unit for extracting the shadow data output permission signal, it is possible to perform delicate adjustment as to whether or not the shadow is added. . In addition, the extraction unit 100
Since the synthesizing unit 600 is independent, the synthesizing unit 600 can freely perform coloring regardless of the color of the extracting unit 100. Furthermore, the present invention is not limited to one region 3 extraction,
By increasing the number of shadow generation units 311 to 313, it is possible to apply to one region multiple extraction.

[0068]

As described above, according to the first aspect of the invention, the line memory storing the designated area data for image processing of the image is shared, and each designated area of the image data is processed by a plurality of different image processing. When performing the above, the boundary of the specified area of the image data is detected, and the line memory is cleared at the boundary.Therefore, interference may occur at the boundary of the area when the line memory is shared and multiple different image processes are performed. Can be prevented.

According to the second aspect of the invention, a plurality of types of image data are extracted from the original image, the types are encoded and stored in the line memory, and image processing is performed.
When a large number of types of image data are extracted from an original image and image processing is performed, the capacity of the line memory can be reduced.

According to the third aspect of the invention, a plurality of types of image data are extracted from the original image, the types are coded and stored in the line memory, and the type code is logically set so as not to interfere with each type of image. Since image processing is performed by calculation, interference can be prevented from occurring for each image type when a large number of types of image data are extracted from the original image and the image processing is performed.

According to the fourth aspect of the invention, the capacity of the line memory can be reduced when a large number of types of image data are extracted from the original image and subjected to image processing.
It is possible to prevent interference from occurring for each type of image.

According to the fifth aspect of the present invention, when a plurality of different image processes are performed by sharing the line memory, it is possible to prevent interference from occurring at the boundary between regions, and at the same time, a large number of original images can be processed. It is possible to reduce the line memory capacity when extracting image data and performing image processing.
Further, it is possible to prevent interference from occurring for each type of image.

According to the sixth aspect of the present invention, since the image processing is performed based on the luminance data and the color difference data of the color image, it is possible to easily perform the image processing using only the luminance data when the color image is converted into black and white. it can.

According to the seventh aspect of the invention, since the luminance data and the color difference data are data in the color coordinate space, it is possible to easily perform image processing using only the luminance data when making a color image into black and white.

[Brief description of drawings]

FIG. 1 is a block diagram showing a processing unit that is a main part of an embodiment of an image processing apparatus according to the present invention.

FIG. 2 is a block diagram showing a copying machine including the processing unit shown in FIG.

FIG. 3 is a block diagram showing a color image processing apparatus including the processing unit of FIG.

4 is an explanatory diagram showing a region detected by a change point detection unit in FIG. 1. FIG.

5 is an explanatory diagram showing boundaries of regions detected by a change point detection unit in FIG. 1. FIG.

FIG. 6 is a block diagram showing the line memory unit of FIG. 1 in detail.

7 is a block diagram showing the line memory unit of FIG. 1 in detail.

8 is a block diagram showing in detail the extraction unit of FIG. 1. FIG.

9 is an explanatory diagram showing the logic of the color extraction unit in FIG.

10 is a block diagram showing in detail the contour processing section of FIG. 1. FIG.

FIG. 11 is a block diagram showing in detail the inside-out processing unit of FIG. 10;

12 is an explanatory diagram showing thinning data, contour data, and deviation data by the contour processing unit of FIG.

13 is a block diagram showing in detail the shadow processing unit of FIG. 1. FIG.

FIG. 14 is a block diagram showing in detail the shadow generation unit of FIG.

15 is an explanatory diagram showing the operation of the shadow generation unit in FIG.

FIG. 16 is an explanatory diagram showing a three-dimensional shadow.

FIG. 17 is an explanatory diagram showing a flat shadow.

FIG. 18 is an explanatory diagram showing a three-dimensional shadow in which YMC components interfere with each other.

FIG. 19 is an explanatory diagram showing a solid shadow in which YMC components do not interfere.

20 is a block diagram showing in detail the combining unit of FIG. 1. FIG.

FIG. 21 is an explanatory diagram showing the operation of the embodiment.

[Explanation of symbols]

 100 Extraction Section 200 Contour Processing Section 300 Shadow Processing Section 400 Change Point Detection Section 500 Line Memory Section 600 Compositing Section

Claims (7)

[Claims] 1. A line memory for storing designated area data for image processing of an image, a clear means for detecting a boundary between designated areas of image data and clearing the line memory at the boundary, and sharing the line memory. An image processing apparatus comprising: a plurality of image processing means for performing image processing on each designated area of image data. 2. Extraction means for extracting a plurality of types of image data from an original image, encoding means for encoding the types of image data extracted by the extraction means, designated area data for image processing the image, and A line memory that stores the type code of the image data encoded by the encoding unit, an expansion unit that expands the type code based on the designated area data stored in the line memory, and an expansion unit that expands the type code. And an image processing unit that performs image processing based on the data. 3. Extraction means for extracting a plurality of types of image data from an original image, encoding means for encoding the types of image data extracted by the extraction means, designated area data for image processing the image, and A line memory that stores the type code of the image data encoded by the encoding unit, and image processing is performed by logically operating the type code so as not to interfere with each type of image in the designated area stored in the line memory. An image processing apparatus including: an image processing unit that performs the image processing. 4. Extraction means for extracting a plurality of types of image data from an original image, encoding means for encoding the types of image data extracted by the extraction means, designated area data for image processing the image, and A line memory that stores the type code of the image data encoded by the encoding unit, an expansion unit that expands the type code based on the designated area data stored in the line memory, and an expansion unit that expands the type code. Image processing means for performing image processing based on the data, and second image processing means for logically operating a type code so as not to interfere with each type of image in the designated area stored in the line memory. And an image processing device including: 5. A boundary of a designated area of image data is detected,
The image processing apparatus according to claim 2, further comprising a clearing unit that clears the line memory at a boundary. 6. The image processing apparatus according to claim 1, wherein the image data is luminance data and color difference data of a color image. 7. The image processing apparatus according to claim 7, wherein the luminance data and the color difference data are data in a color coordinate space.