JP2633567B2 - Image processing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing method, and more particularly to an image processing method for performing shape error correction when a figure given contour information is painted and developed.

2. Description of the Related Art Conventionally, when contour image data is developed into a dot pattern and drawn, coordinate values of the contour given by real values are converted into coordinates corresponding to, for example, addresses of a memory for developing the dot pattern. The value is simply converted to a value, and the inside of the outline is painted.

[Problems to be Solved by the Invention] For this reason, as shown in FIG. 8, in the blank portions 80 and 81 where figures are close to each other, when the scale is reduced, the blank portions 80 and 81 are reduced.
Was lost, and the figure was crushed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional example, and an object of the present invention is to provide an image processing method for preventing a region having a small blank portion of image data from being collapsed.

[Means for Solving the Problems] To achieve the above object, an image processing method according to the present invention comprises the steps of: inputting contour data of graphic information; and detecting a contour pattern of the graphic information based on the contour data. Is created, a filling pattern is created by filling the inside of the contour pattern, and the contour pattern is masked with a predetermined pattern to obtain a contour pattern of the filling pattern.

[Operation] According to the image processing method of the present invention described above, contour data of graphic information is input, and a contour pattern of graphic information is created based on the input contour data. Further, a filling pattern in which the inside of the contour pattern is filled is created, and the contour pattern is masked with a predetermined pattern to be a contour pattern of the filling pattern.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Description of Graphic Processing Apparatus (FIG. 1)] FIG. 1 is a block diagram showing a schematic configuration of a graphic processing apparatus according to the embodiment.

In the figure, reference numeral 1 denotes an MPU (microprocessor unit) such as a microprocessor, for example, which controls the entire apparatus according to a control program in the ROM 7 shown in the flowchart of FIG. Reference numerals 2 and 3 denote floppy disk devices and hard disk devices for storing document data, image data, and the like, respectively, which are connected to a system bus 10 via a disk interface unit 6. Reference numerals 4 and 5 denote image memories having almost the same memory capacity. Pattern data is developed into dot images in the form of dots, and the image data is transferred to the video memory 11 for display on a CRT. 15 through 14 printer
Can be output to

7 is the RO that stores the control program and data of MPU1
M and 8 are RAMs used as a work area of the MPU 1 and temporarily storing character data and other various data input from the system bus 10. Reference numeral 11 denotes a video memory (VRAM) for storing bit map data for display output to the CRT 12, which receives and stores the image data from the image memory 4 or 5 as it is, and
It can be displayed on T12.

13 is Bit Manipulation Unit (BMU)
It operates bit data of the image memories 4 and 5 and the video memory 11 and has a DMA transfer function between the memories. A printer 14 prints out a dot image based on the dot data sent via the printer interface unit 15.
Printing can be performed based on image data from the RAM 5 or the RAM 8 and the video memory (VRAM) 11. Reference numeral 16 denotes a keyboard for inputting various data and instruction data.

[Contour Correction Processing (FIGS. 2 to 7)] FIG. 2 is a flowchart of the contour correction processing of the embodiment.

First, an outline is drawn in the image memory 4 in step S1. This may be created based on coordinate values input from the keyboard 16 or the like, or may be created based on image data input from the disk 2 or 3.
In step S2, set the thickness of the contour line to CRT12 or printer 1.
Data having a thickness corresponding to one dot of the output dot 4 is created in the image memory 5. This is shown in the contour pattern in FIG.

Next, in step S3, the inside of the outline of the image memory 4 is painted out to obtain the pattern data shown in FIG.
In step S4, the logical product of the inversion data of the contour line pattern of the image memory 5 shown in FIG. 3 and the fill data of the image memory 4 is calculated, and the image data obtained by calculating the logical product is stored in the image memory 4. This is shown in the pattern data of FIG.

Next, in step S5, the outline pattern of the image memory 5 and the halftone dot pattern developed in the RAM 8 are accumulated to obtain a halftone dot pattern of the outline as shown in FIG. To be stored. In this way, the halftone dot pattern of FIG. 6 developed in the image memory 5 and the pattern data of FIG. 5 developed in the image memory 4 are logically ORed in step 6 to obtain the pattern shown in FIG. The pattern data in FIG. 7 visually corrects the contour of the pattern in which the inside of the contour of FIG. 4 is filled, and visually corrects the collapse of the cut portion of the contour.

[Explanation of Second Embodiment (FIGS. 9 to 13)] FIG. 9 is a flowchart of the contour correction processing of the second embodiment.

First, in step S10, a contour line for filling is drawn in the image memory 4 in the same manner as in step S1 of FIG. 2 (see FIG. 10). In step S11, a 1-dot-thick outline pattern is stored in the image memory 5, and the process proceeds to step S1.
In step 2, a pattern is created in which the inside of the outline in the image memory 5 shown in FIG. 11 is filled.

In step S13, the contour line pattern in the image memory 4 is changed to a pattern generated alternately in black and white (see FIG. 12). The portion is extracted, and the sum with the contour pattern developed in the image memory 4 obtained in step S13 is calculated. This is shown in
13 is a pattern shown in FIG.

As a result, as apparent from comparison with FIG. 11, the contour portion is not completely crushed.

Further, in the above-described embodiment, the correction of the contour line with the dot data has been described. However, the present invention is not limited to this. For example, for a laser beam printer that performs luminance modulation and outputs the result, FIG. As shown in the figure, the halftone processing is performed on the contour pattern, and the contour is used as the contour of the fill pattern, whereby the contour correction as shown in FIG. 15 can be performed.

In the above-described first embodiment, a halftone pattern having a black-and-white ratio of 1: 1 has been described as an example of hatching of a contour line. However, the present invention is not limited to this. It may be set appropriately depending on the thickness and the like.

As described above, according to the present embodiment, the contour of an arbitrary figure is formed into a hatched pattern, which has the effect of preventing visual collapse of the figure.

[Effects of the Invention] As described above, according to the present invention, there is an effect that, when the inside of the outline of a figure is filled, the outline is prevented from being broken.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a graphic processing apparatus of the present embodiment, FIG. 2 is a flowchart of a contour correction process of the first embodiment, and FIG. 3 is an example of a contour pattern to be corrected. FIG. 4 is a view showing an example of a figure in which the outline shown in FIG. 3 is filled, FIG. 5 is a view showing a figure obtained by removing the outline from the figure in FIG. 4, and FIG. FIG. 7 is a diagram showing an example of a contour line obtained by shading the contour line pattern of FIG. 3, FIG. 7 is a diagram showing an example of a figure in which the contour of the pattern of FIG. 4 has been corrected, FIG. ) Is a diagram showing a drawing example of a conventional reduced figure, FIG. 9 is a flowchart of the contour correction process of the second embodiment, FIG. 10 is a diagram showing an example of a contour pattern to be corrected, FIG. FIG. 12 is a diagram showing an example of a figure in which the outline shown in FIG. 10 is filled, and FIG. 12 is a diagram showing the outline pattern of FIG. FIG. 13 is a diagram showing an example in which the contour of the pattern of FIG. 11 is corrected, FIG. 14 is a diagram showing an example in which the contour pattern is expressed by halftone, FIG. 15 is a diagram of FIG. FIG. 15 is a diagram in which the contour of the pattern is represented by the contour of FIG. In the figure, 1 ... MPU, 2 ... Floppy disk, 3 ...
Hard disk, 4, 5 ... Image memory, 6 ... Disk interface unit, 7 ... ROM, 8 ... RAM, 10
… System bus, 11… VRAM, 12… CRT, 13… Bit management unit, 14… Printer, 15
.., A printer interface unit, and 16 a keyboard.

Claims (3)

(57) [Claims] 1. An outline data of graphic information is inputted, an outline pattern of the graphic information is created on the basis of the outline data, a fill pattern in which the inside of the outline pattern is filled is created, An image processing method, characterized in that a line pattern is masked with a predetermined pattern to be a contour pattern of the solid pattern. 2. The image processing method according to claim 1, wherein said predetermined pattern is a hatched pattern. 3. The image processing method according to claim 1, wherein the predetermined pattern is a pattern obtained by thinning every other contour pattern.