JP2007026285A - Image processor and image processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To draw a figure obtained by magnifying source image data configured by one line at high speed. <P>SOLUTION: A drawing data analysis part 3 analyzes a source image, and decides whether or not it is image processing for arranging the source image of a width or a height of one pixel side by side in a direction perpendicular to a line direction and magnifying it. A drawing processing part 4 secures a source image buffer 4-1 storing the source image, a line buffer 4-2 storing an image after the image processing corresponding to one line, and a destination image buffer 4-3 according to a decision result of the drawing data analysis part 3, stores a drawing processing result corresponding to one line into the line buffer 4-2, and copies the drawing processing result to the destination image buffer 4-3 in line units to draw an image. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image processing apparatus and an image processing program for drawing a figure obtained by enlarging source image data composed of one line.

  In conventional image processing, when the source image data is drawn in the destination buffer after the arithmetic processing, it is necessary to refer to the pixel of the corresponding source image for each pixel by performing scan conversion on the destination image. is there. However, when rendering one line of source image data enlarged in a direction perpendicular to the line direction, the same pixel in the source image is referred to many times by scan conversion, which is inefficient.

Therefore, with respect to drawing of a gradation fill figure, a technique has been proposed in which pixel information of one line is copied to pixels of the next line when gradation is detected (see, for example, Patent Document 1).
JP 2001-101431 A

  However, the above-described prior art is a high-speed method for a new drawing by a graphics drawing command (intermediate code), and creates a gradient pattern by calculating the color of the pixel and reproducing the gradation. This is a technique specialized in gradation that draws the image, and there is a problem that it is difficult to apply to a drawing method such as enlargement of one line image.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an image processing apparatus and an image processing program capable of drawing a figure obtained by enlarging source image data composed of one line at high speed. It is to provide.

  In order to solve the above-described problem, the present invention is an image processing apparatus that generates a destination image by performing image processing on a source image that is a drawing source, and includes at least a height or a width of the source image. Detecting means for detecting that one of the pixels is one pixel; and if the detecting means detects that at least one of the height or width of the source image is one pixel, the height or width of the destination image A line buffer securing means for securing a line buffer of a size on the memory, an image processing means for performing image processing on one line of the source image, and data subjected to image processing by the image processing means for the line A storage control means for storing in the buffer; and the storage control means stores the line buffer. Characterized by comprising a drawing means for drawing the destination image by using a plurality of times the data is.

  The present invention is characterized in that, in the above invention, the drawing means draws the destination image by duplicating the data stored in the line buffer a plurality of times in line units.

  In the present invention, in the above invention, when the height of the source image is 1 pixel, the line buffer securing unit reserves a line buffer having a width size of the destination image on a memory, and When the width of the source image is 1 pixel, a line buffer having a height size of the destination image is secured on the memory.

  In order to solve the above-described problem, the present invention is an image processing program for generating a destination image by performing image processing on a source image that is a drawing source, the height or width of the source image. A detecting step for detecting that at least one of the pixels is one pixel, and when the detecting step detects that at least one of the height or width of the source image is one pixel, the height of the destination image Alternatively, a line buffer securing step for securing a line buffer of a width size on the memory, an image processing step for performing image processing on one line of the source image, and data subjected to image processing by the image processing means Storage control step for storing in the line buffer, and the storage control Characterized in that to execute a drawing step of the data stored in the line buffer by the step using multiple drawing the destination image into the computer.

  According to the present invention, the detection means detects that at least one of the height or width of the source image is 1 pixel, and detects that at least one of the height or width of the source image is 1 pixel. The line buffer securing means secures a line buffer of the size of the destination image on the memory, the image processing means performs image processing on one line of the source image, and the storage control means The image-processed data is stored in the line buffer, and the destination image is drawn by the drawing means using the data stored in the line buffer a plurality of times. Accordingly, since only one line of scan conversion is required, a figure obtained by enlarging the source image data composed of one line can be drawn at high speed.

  According to the present invention, the destination image is drawn by copying the data stored in the line buffer a plurality of times in units of lines by the drawing means. Since only one line of scan conversion is required, a figure obtained by enlarging the source image data composed of one line can be drawn at high speed.

  Further, according to the present invention, when the height of the source image is 1 pixel by the line buffer securing means, a line buffer having a width size of the destination image is secured on the memory, and the width of the source image is In the case of 1 pixel, a line buffer having a height size of the destination image is secured on the memory. Accordingly, since only one line of scan conversion is required, a figure obtained by enlarging the source image data composed of one line can be drawn at high speed.

  According to the present invention, it is also possible to detect that at least one of the height or width of the source image is 1 pixel, and to detect that at least one of the height or width of the source image is 1 pixel. Then, a line buffer securing step for securing a line buffer having a height or width size of the destination image on the memory, an image processing step for performing image processing on one line of the source image, and image processing are performed. The computer executes a storage control step for storing the stored data in the line buffer, and a drawing step for drawing the destination image using the data stored in the line buffer a plurality of times. Accordingly, since only one line of scan conversion is required, a figure obtained by enlarging the source image data composed of one line can be drawn at high speed.

Hereinafter, an image processing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an image processing apparatus according to an embodiment of the present invention. The image processing apparatus 1 includes an input unit 2, a drawing data analysis unit 3, a drawing processing unit 4, and an output unit 5. The input unit 2 inputs a source image. The drawing data analysis unit 3 analyzes the source image input from the input unit 2 and outputs an enlarged image drawing command code of one line of source image, that is, a source image having a width or height of one pixel as a source. It is determined whether or not the image processing is performed by arranging and magnifying images in a direction perpendicular to the line direction.

  The drawing processing unit 4 includes a source image buffer 4-1 for storing a source image and a line buffer 4-2 for storing an image processed image for one line and a destination image buffer according to the determination result of the drawing data analysis unit 3. 4-3 is secured. The drawing processing unit 4 performs drawing processing (process) such as color conversion on the source image (for one line) in the source image buffer 4-1, and the drawing processing result for the one line is displayed in the line buffer. The image is drawn by copying the result of the drawing process of the line buffer 4-2 to the destination image buffer 4-3 in units of lines. The output unit 5 outputs the drawn figure.

  Next, the operation of the above-described embodiment will be described. Here, FIG. 2 is a flowchart for explaining the operation of the image processing apparatus according to the present embodiment. First, drawing data is analyzed (step S10) and it is determined whether it is image data (step S12). If it is not image data, the process ends. On the other hand, if it is image data, it is determined whether the height of the source image is 1 pixel or the width of the source image is 1 pixel (step S14). That is, is it an image processing for generating a destination image by expanding a source image having a width or height of 1 pixel as shown in FIGS. 3 and 4 by arranging the source images in a direction perpendicular to the line direction? Detect whether or not.

  If none of them is a pixel, image processing is performed by scan-converting all the pixels in the destination image buffer 4-3 as shown in FIG. 5 (step S16). On the other hand, if either the height or the width of the source image is 1 pixel, it is determined whether or not the height is 1 pixel (step S18).

  Here, when the height of the source image is 1 pixel, that is, when drawing an enlarged image of the source image having a height of 1 pixel, the size of the line buffer is first set based on the width of the source image. Calculation is performed (step S20), and as shown in FIG. 6, a line buffer 4-2 having a width size of the destination image buffer 4-3 is secured (step S22). Next, an image drawing process (process) for one horizontal direction line (one scan line) is performed on the source image in the source image buffer 4-1 (step S24), and the drawing operation for the one scan line is performed. The processing result is stored in the line buffer 4-2 (step S26). The drawing process (process) may include an expansion process in addition to the image process such as color conversion.

  Next, as shown in FIG. 7, the data in the line buffer 4-2 is copied to the current drawing target line in the destination image buffer 4-3 (step S28), and the number of pixels corresponding to the height of the destination image. It is determined whether or not processing has been performed (step S30). Then, until the processing for the number of pixels of the height is completed, the drawing is performed by repeating the copy in step S28. on the other hand. When the processing for the number of pixels corresponding to the height of the destination image ends, the processing ends.

  On the other hand, when the height of the source image is not 1 pixel, that is, when drawing an enlarged image of the source image with a width of 1 pixel, first the line buffer size is calculated based on the height of the source image. (Step S32), as shown in FIG. 8, the line buffer 4-2 having the height size of the destination image buffer 4-3 is secured (Step S34). Next, an image drawing process of one vertical direction line (first pixel of each scan line) is performed on the source image in the source image buffer 4-1 (step S36), and the first pixel of each scan line is drawn. The calculation processing result is stored in the line buffer 4-2 (step S38). The drawing process (process) may include an expansion process in addition to the image process such as color conversion.

  Next, as shown in FIG. 9, the data in the line buffer 4-2 is copied line by line to the current drawing target line in the destination image buffer 4-3 (step S40), and the number of pixels having the width of the destination image. It is determined whether or not the minute processing has been performed (step S42). Then, until the processing for the number of pixels in the width is completed, the drawing is performed by repeating the copying in step S40. On the other hand, when the processing for the number of pixels corresponding to the width of the destination image is completed, the processing ends.

  According to the above-described embodiment, when drawing a figure in which a source image composed of one line is enlarged, only one-line scan conversion is performed and stored in the dedicated line buffer 4-2. Since the figure is drawn by repeating copying the pixel data of 2 to the destination image buffer 4-3 in line units, drawing can be performed at a higher speed than the processing in pixel units.

  In the above-described embodiment, a series of processes by the drawing data analysis unit 3 and the drawing processing unit 4 described above are stored in a computer-readable recording medium in the form of a program. Is read and executed, the above processing is performed. That is, in each of the processing means and processing units in the drawing data analysis unit 3 and the drawing processing unit 4, a central processing unit such as a CPU reads the above program into a main storage device such as a ROM or a RAM, and processes and processes information. This is realized by executing arithmetic processing.

  Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

It is a block diagram which shows the structure of the image processing apparatus by embodiment of this invention. It is a flowchart for demonstrating operation | movement of the image processing apparatus by this embodiment. It is a conceptual diagram for demonstrating the image processing which expanded the source image of the width of 1 pixel by arranging the source image in the direction perpendicular to the line direction. It is a conceptual diagram for demonstrating the image processing which expanded the source image of 1 pixel height, arranging the source image in the perpendicular direction with respect to the line direction. It is a conceptual diagram which shows the mode in the case of performing image processing by carrying out scan conversion of all the pixels. It is a conceptual diagram for demonstrating the drawing process of the image in case the height of a source image is 1 pixel. It is a conceptual diagram for demonstrating the drawing process of the image in case the height of a source image is 1 pixel. It is a conceptual diagram for demonstrating the drawing process of the image in case the width | variety of a source image is 1 pixel. It is a conceptual diagram for demonstrating the drawing process of the image in case the width | variety of a source image is 1 pixel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image processing apparatus 2 Input part 3 Drawing data analysis part (detection means)
4 Drawing processing unit (line buffer securing means, image processing means, storage control means, drawing means)
4-1 Source image buffer 4-2 Line buffer 4-3 Destination image buffer 5 Output section

Claims (4)

An image processing apparatus that generates a destination image by performing image processing on a source image to be rendered,
Detecting means for detecting that at least one of a height or a width of the source image is one pixel;
When the detection means detects that at least one of the height or width of the source image is 1 pixel, a line buffer is secured to secure a line buffer having the size of the height or width of the destination image on the memory. Means,
Image processing means for performing image processing on one line of the source image;
Storage control means for storing data subjected to image processing by the image processing means in the line buffer;
An image processing apparatus comprising: a drawing unit that draws the destination image by using the data stored in the line buffer by the storage control unit a plurality of times.   The image processing apparatus according to claim 1, wherein the drawing unit draws the destination image by duplicating the data stored in the line buffer a plurality of times in units of lines. The line buffer securing means includes
When the height of the source image is 1 pixel, a line buffer having a width size of the destination image is secured on the memory,
2. The image processing apparatus according to claim 1, wherein when the width of the source image is 1 pixel, a line buffer having a height size of the destination image is secured in a memory. An image processing program for generating a destination image by performing image processing on a source image to be rendered,
A detection step of detecting that at least one of a height or a width of the source image is one pixel;
When the detection step detects that at least one of the height or width of the source image is 1 pixel, the line buffer is secured to secure a line buffer having the size of the height or width of the destination image on the memory. Steps,
An image processing step for performing image processing on one line of the source image;
A storage control step of storing data subjected to image processing by the image processing means in the line buffer;
An image processing program for causing a computer to execute a drawing step of drawing the destination image by using the data stored in the line buffer by the storage control means a plurality of times.

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