JPH0816927B2 - Image processing device - Google Patents

Description

The present invention relates to an image processing apparatus for converting an original image by generating a pattern having a predetermined shape at a random position on an original image.

[Prior Art] With respect to digital image processing, various devices and various methods have been developed in various fields, and natural images such as photographs can be input as digital image data to perform density conversion, gradation It is possible to create creative images by performing processing such as conversion, mosaic processing, and cutout synthesis. As such a method, one is to uniformly perform density conversion, gradation conversion, mosaic processing, etc. on the entire screen, and the operator does not need any instruction, but the entire screen is the same. The pattern was repeated, resulting in an uninteresting image without sharpness.

As another method, there is a method in which an image input means such as a digitizer or a random number generation means is used to indicate a portion on the screen, and only this portion is subjected to processing such as density conversion, color conversion, and cutout synthesis. This creates a processed part and a non-processed part in the screen, so the image can be sharpened, and various patterns can be created by processing again after processing, resulting in an extremely creative image. Can be created.

[Problems to be Solved by the Invention] However, these methods have a problem in that time is overrun because they are generated by random numbers and are executed according to an instruction from an operator. Furthermore, when randomly designating with a random number, a shape is created at discrete positions, so another shape may be drawn on top of a shape drawn once, and the same pixel may be processed twice or more. However, there is a drawback that it takes extra time.

The present invention has been made in view of the above-mentioned conventional example, and converts the coordinates of a plurality of pixels in a predetermined pattern centered at a pixel designated at random to the coordinates of a designated pixel to create a coordinate file. By using the coordinate file to convert the pixel color of the input image data into the pixel color of the corresponding coordinate of the image data specified by the coordinate file, the image data can be converted at high speed. An object is to provide an image processing device.

[Means for Solving Problems] In order to achieve the above object, the image processing apparatus of the present invention has the following configuration. That is, a designating unit that randomly designates a pixel of image data, a generating unit that generates a predetermined pattern composed of a plurality of pixels with the pixel designated by the designating unit at the center, and a plurality of pixels in the predetermined pattern. Forming means for converting coordinates into coordinates of the designated pixels to form a coordinate file; random pixel designation by the designating means, generation of a predetermined pattern by the generating means, and formation of a coordinate file by the forming means. Repeating a plurality of times, using the control means for completing the coordinate file and the coordinate file formed by the control means, the color of the pixel of the input image data of the corresponding coordinates of the image data specified by the coordinate file And a conversion unit that converts the pixel color.

[Operation] In the above configuration, the coordinates of a plurality of pixels in a predetermined pattern centered at a randomly designated pixel are converted into the coordinates of the designated pixel to create a coordinate file, and the coordinate file is used. Then, the color of the pixel of the input image data is converted into the color of the pixel of the corresponding coordinate of the image data designated by the coordinate file.

Embodiments Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[Description of Configuration of Image Processing Apparatus (FIG. 1)] FIG. 1 is a configuration diagram of the image processing apparatus of the present embodiment.

In the figure, reference numeral 1 is an image input unit such as a TV camera or a drum scanner, which photoelectrically reads an original image such as a photographic film or a print image, performs A / D conversion and converts the digital signal into a CPU.
Enter 2 Reference numeral 2 denotes a CPU for controlling the entire apparatus, which is provided with a ROM for storing control programs and data shown in the flow chart of FIG. 2 and subsequent drawings, a RAM as a work area, and the like. An image memory 3 includes an image memory 31 for storing the original image data from the image input unit 1 and an image memory 32 for storing the processed image data which has been subjected to various image processes described later.
It has and.

Reference numeral 4 denotes a command input unit such as a keyboard or a digitizer for inputting various image processing commands described later.
In the case of a keyboard, by pressing the command key corresponding to various processing, in the case of a digitizer, the command can be given by pointing the menu on the digitizer board or the menu displayed on the CRT screen with a cursor. Be seen. Reference numeral 5 is a data file for storing coordinate conversion files corresponding to various image processing commands.

Reference numeral 6 is a CRT for displaying image data in the image memory 3 or a menu display for command input. The CPU 2 reads the coordinate conversion file from the data file 5 in response to the processing command from the command input unit 4, performs the necessary processing on the original image data of the image memory 31, and executes the image memory 32.
To be stored. The image data thus created is printed by the output unit 7 such as a printer or a film coder.

[Explanation of Mosaic Processing (FIGS. 2 to 4)] FIG. 2 is a diagram showing an example of mosaic processing performed on an image.

Reference numeral 20 denotes an image, which is composed of x ₀ pixels in the horizontal direction and y ₀ pixels in the vertical direction, which is an image obtained by equally mosaic-processing an unillustrated original image by a mosaic 22, and the coordinates of the upper left corner are (1,
1), the coordinates of the lower right corner are indicated by (x ₀ , y ₀ ). Reference numeral 21 is a mosaic randomly arranged in the image 20, and its size is (2m + 1) in width and (2n + 1) in height. However, m and n are positive numbers here.

FIG. 3 is a flow chart for creating a coordinate conversion file for mosaic processing, which is stored in the data file 5.

First, in step S1, an array X (x ₀ , y) for storing the X and Y coordinates converted for each pixel of the original image is stored.
Prepare ₀ ), Y (x ₀ , y ₀ ) in RAM of CPU2.

Next, in step S2, each element of the array X (x, y), Y (x, y)
Substitute the coordinate value corresponding to the coordinate value (x, y) of the original image into. As a result, array element X (x, y) = x, Y (x, y)
= Y. However, 1 ≦ x ≦ x ₀ and 1 ≦ y ≦ y ₀ . This is because even if a mosaic is generated using random numbers, there is a possibility that some pixels will not be subjected to coordinate conversion until the end, so the coordinate values of all elements are set in advance. .

Next, in step S3, the counter J for counting the number of mosaics 21 is set to "1". In step S4, a random number is generated to generate the center coordinates (x _r , y _r ) of the mosaic 21 within the coordinates of the original screen. However, 1 ≤ x _r ≤ x ₀ , 1 ≤ y _r
≦ y ₀ . Next, in step S5, the coordinates (X, Y) of all the elements in the mosaic area centered on the central coordinates (x _r , y _r ) are set to
Set the center coordinates (x _r , y _r ). In this mosaic area, x _r −m + 1 to x _r + m− based on the size of the mosaic 21.
_{1, y r -n + 1~y r} + n-1 of the element having a coordinate value in the range corresponds.

Next, in step S6, "0" is assigned to the X coordinate and Y coordinate of the element forming the black frame area of the mosaic 21. Each black frame region _{(x r -m, y r -n~y} r + n), (x r + m, y r -n
_{~y r + n), (x} r -m~x r + m, y r -n), (x r -m~x r
+ M, y _r + n) is a rectangular linear region. It should be noted that this black frame area is added to give a tightness to the entire image, and the value indicating this area does not necessarily have to be "0", as long as it is a value outside the screen area. Of course, at least one of the X and Y coordinates may be changed to a value outside the screen area to indicate the black frame area.

In step S7, the counter J that counts the mosaic 21 is +
Then, in step S8, it is checked whether N times, which is the number of mosaics 21, have been repeated. If the number of mosaics 21 does not reach N, the process returns to step S4 and the above-described operation is repeated. However, if the number of mosaics 21 reaches N, the process proceeds to step S9 to set the X coordinate and Y coordinate values of each element. The data is stored in the data file 5, and the process is ended.

FIG. 4 is a flow chart of the mosaic processing of this embodiment.

First, in step S10, original image digital data is input from the image input section 1, and in step S11 the original image data is stored in the image memory 31. Then step S12
Then, mosaic processing with a black frame having a size of 2m + 1 in width and 2n + 1 in length is performed on the entire screen and stored in the image memory 32. As shown in FIG. 2, the original image is divided into squares by the mosaic 22, each mosaic 22 has the same color, and the pixels at the boundary between the mosaics 22 are changed to black. . After this, a random mosaic 21 is generated in steps S14 to S22.

In step S13, the coordinate counters in the X and Y directions are both set to "1", and in step S14 the coordinate conversion value is read from the data file 5 created based on the flow chart of FIG. At step S15, it is checked whether at least one of the arrays X (x, y) and Y (x, y) is "0", that is, the boundary area of the mosaic. If it is the boundary area, the process proceeds to step S16 and the image memory 3
Put black in the corresponding coordinates of 2. If it is not the boundary area, the process proceeds to step S17, and it is determined whether the coordinate conversion value in the data file 5 is equal to the original coordinate value, that is, X (x, y) = x and Y (x, y) = y. View. If it is equal to the original coordinate value, that is, if the coordinate conversion has not been performed, the process proceeds to step S19 without doing anything, but otherwise, the process proceeds to step S18, where the coordinate of the corresponding original image in the image memory 31 (X,
The color of Y) is put into the coordinates (x, y) of the image memory 32.

Check whether the pixels for one line in the x direction have been checked in steps S19 and S20. When the check of the pixels for one line is completed, the process proceeds to step S21 and advances by one line in the y direction to check the next line. When the processing for one screen is completed, the processed image data is stored in the image memory 32, and the image data in the image memory 32 is output to the output unit 7 in step S24, and the processing is completed.

As described above, if the coordinate conversion file is prepared in advance in the data file 5, the pixels can be sequentially processed. Random numbers are used to generate coordinate values each time, and the processing speed can be increased as compared with the case of repeating the step of processing the periphery of the pixel corresponding to the coordinate values.

[Explanation of Oil Painting-like Processing (FIGS. 5 to 8)] FIG. 5 is a diagram showing an example in which a block 50 showing the touch of a brush is arranged at a random position on an original image showing another embodiment. is there.

Reference numeral 51 is an original image composed of x ₀ pixels in the horizontal direction and y ₀ pixels in the vertical direction. The upper left corner of the image is (1,1) and the lower right corner is (x ₀ , y ₀ ). Has been done. Reference numeral 50 is a block showing the shape of the brush, which is shown in FIG. 6 and consists of horizontal 7 pixels and vertical 5 pixels. N pieces are arranged at random positions in the original image, and the natural image is drawn as if it were an oil painting. Like this.

FIG. 7 is a flow chart of a coordinate conversion file creating process for oil painting style processing stored in the data file 5.

Similar to the flow chart of Fig. 3, step S30
The array X (x ₀ , y ₀ ), Y (x ₀ , y ₀ ) is prepared in S32, and the coordinate values (1 to x ₀ , 1
y ₀ ) is set. In step S33, a random number is generated to obtain the coordinates (x _r , y _r ) of the center 52 of the block 50 within the coordinates of the original image 51. Block on Step S34
The coordinates of pixels corresponding to 50 are all (x _r , y _r ). Ie x
Among the pixels within the range of _r −3 ≦ x ≦ x _r + 3, y _r −2 ≦ y ≦ y _r +2, the X, Y coordinates of the pixel existing in the block 50 are defined as (x _r , y _r ). To do.

The major difference from the flow chart of FIG. 3 is that in the case of oil painting-like processing, there is no part (boundary area) surrounded by a black frame, so the processing corresponding to step S6 of FIG. Omitted.

When N blocks 50 are formed on the image, step S3
7, the values of the X coordinate and the Y coordinate are not stored in the data file 5 as they are, but the difference between the X coordinate, the Y coordinate and the coordinate value x, y of the pixel, the value of X−x, Y−y. To store. When the X and Y coordinate values are stored in the data file 5 as they are, the X coordinate value is 1 to x ₀ and the Y coordinate value is 1 to y _0.
Therefore, a data area satisfying x ₀ , y ₀ must be prepared for each element, which requires a very large amount of memory.

However, if the difference in the coordinate value of the data area is stored as in this embodiment, the coordinate value is at most within the size of the shape of the touch of the brush even if the coordinate conversion is performed.
x is within the range of -3 to +3 and Y-y is within the range of -2 to +2. This has the effect of reducing the data area and significantly saving memory.

FIG. 8 is a flow chart of oil-painting-like processing using a coordinate conversion file of another embodiment, which is basically the same as the flow chart of FIG. 4, but differs greatly from that of FIG. , The coordinate value of the coordinate conversion file is included as a difference value, and the point without the black frame area. Furthermore, in the oil painting process, since the brush touch is added on the original image, the original image is also stored in the image memory 32. There is no need to process and store.

The steps S40 to S42 are the same as the steps S10 to S13 in FIG. 4, so that the description thereof will be omitted and the step S43 will be described. In step S43, the difference between the X and Y coordinates from the data file 5 is ΔX, Δ
Y is read, and in step S44, the color of the coordinates (x + ΔX, y + ΔY) of the original image in the image memory 31 is stored in the coordinates (x, y) of the image memory 32. In this way, 1 ≦ x ≦ x ₀ ,
When all the pixels for one screen of 1 ≦ y ≦ y ₀ are configured in the image memory 32, the process proceeds to step S50, the processed image in the image memory 32 is output to the output unit 7, and the process is ended.

As described above, storing the difference value between the X coordinate and the Y coordinate in the data file 5 has the effect of significantly reducing the memory capacity required for the data file 5. In addition, in this process, if it is desired to perform a process with a black frame, a value deviating from the value required for the shape of the touch of the brush (in the case of FIG. 6, substitute -3 for the Y coordinate) is stored in the data file. It is advisable to perform a process of converting to black according to the value at the time of processing.

[Explanation of an example in which the data area of the coordinate conversion file is larger than the processed image area (FIGS. 9 to 11)] FIG. 9 is a diagram showing the relationship between the processed image area 91 and the data area 92, and 91 is the processing An image area is shown, which is composed of pixels of horizontal x ₀ and vertical y ₀ like the above-mentioned embodiment, and the processed image in the data area 92 is based on the coordinates (x _s , y _s ) of the upper left corner. The area 91 is movable within a range that does not protrude. The data area 92 is larger than the processed image area 91. Area 1 ≦ x ≦ x _d , 1 ≦
It is a data area of the coordinate conversion file having y ≦ y _d (where x _d > x ₀ , y _d > y ₀ ).

FIG. 10 is a flow chart of yet another embodiment for creating a coordinate conversion file in the range of the data area 92 in the data file 5. This flow chart is exactly the same as the flow chart of FIG. 7 except for the dimensions of the arrays X and Y, and the description thereof is omitted.

FIG. 11 is a flow chart of oil painting style processing of the embodiment when a coordinate conversion file having a data area larger than the processed image area is stored in the data file 5.

The original image is stored in the image memory 31 from the image input unit 1 in steps S70 and S71. In step S72, a random number is generated and the start coordinates (x _s ,
y _s ). However, here, 1 ≦ x _s ≦ x _d −x ₀ , 1 ≦ y _s ≦ y _d
Of course, it is in the range of −y ₀ . Step S73
Then, the counters in the x and y directions are both set to "1", and the difference Δx (x
+ X _s −1, y + y _s −1) and ΔY (x + x _s −1, y + y _s −1) are read. Therefore, first, the difference data corresponding to the coordinates (x _s , y _s ) of the original image are read out, and the step S
At 75 and S76, it is checked whether x + ΔX and y + ΔY are in the processed image area 91, respectively. When not in the area 91,
The difference data is set to "0" in S76 and S78, but if it is in the area 91, the process proceeds to step S79.

In step S79, the coordinates of the original image (x + ΔX, y +
The color ΔY) is stored in the coordinates (x, y) of the processed image. In this way, the processed image is stored in the image memory 32,
When the processing is completed for all the pixels of the original image, it is output to the output unit 7 in step S85 and the processing is ended.

In this way, the coordinate conversion file of the data file 5 is made larger than the processing image area, and the processing is performed using the same coordinate conversion file by performing the processing while changing the position of the image area at random. However, different results will be obtained each time, and various variations of results can be created. When processing is performed using this method, the values of x + ΔX and y + ΔY may go out of the processing image area. In this case, ΔX and ΔY are set to “0” in step S76 and step S78, respectively. And then processing.

As described above, according to the present embodiment, by preparing and preparing the coordinate conversion file in advance, it is possible to process at a higher speed than generating a random number every time and arranging a shape. is there.

According to another embodiment, the difference in coordinate value is stored in the memory as the coordinate conversion file information, so that there is an effect that the capacity of the memory can be significantly reduced.

According to still another embodiment, even if the same conversion file is used by creating a data area of the coordinate conversion file larger than the processing image area and selecting the processing image area at random from the data area, The effect is that it can be converted into a different image.

[Effect of the Invention] As described above, according to the present invention, the coordinates of a plurality of pixels in a predetermined pattern centered at a randomly designated pixel are converted into the coordinates of a designated pixel to create a coordinate file. Create and use the coordinate file to convert the pixel color of the input image data to the pixel color of the corresponding coordinate of the image data specified by the coordinate file, so that the image data can be converted at high speed. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a block diagram of the image processing apparatus of the present embodiment, FIG. 2 is a conceptual diagram showing mosaic processing, FIG. 3 is a flow chart for creating a coordinate conversion file for mosaic processing, and FIG. 4 is a mosaic processing flow. Chart, Fig. 5 is a conceptual diagram showing oil painting style processing, Fig. 6 is a diagram showing the shape of the touch of the brush, Fig. 7 is a flow chart for creating a coordinate conversion file for oil painting style processing, and Fig. 8 is an oil painting style. Flow chart of processing, Fig. 9 is a conceptual diagram when the coordinate conversion file is made larger than the processing image area, Fig. 10 is a flow chart of coordinate conversion file creation in the case of Fig. 9, and Fig. 11 is oil painting style processing. Is a flow chart for processing the above-mentioned case in FIG. In the figure, 1 ... Image input section, 2 ... CPU, 3 ... Image memory, 4 ... Command input section, 5 ... Data file, 6
…… CRT, 7 …… Output unit, 51 …… Original image, 21…
... Random mosaic, 22 ... Mosaic, 31,32 ... Image memory, 50 ... Block, 52 ... Central pixel, 91 ... Processed image area, 92 ... Data area.

Claims (1)

[Claims] 1. A designating means for randomly designating pixels of image data, a generating means for generating a predetermined pattern composed of a plurality of pixels having a pixel designated by the designating means substantially at the center, and a plurality of means within the predetermined pattern. Forming means for converting the coordinates of the pixels of the above into the coordinates of the specified pixels to form a coordinate file; random pixel specification by the specifying means; generation of a predetermined pattern by the generating means; and coordinate file by the forming means. The control means for repeating the formation of a plurality of times to complete the coordinate file, and using the coordinate file formed by the control means, the color of the pixel of the input image data corresponds to the image data specified by the coordinate file. An image processing apparatus comprising: a conversion unit that converts the color of a pixel at a coordinate to