JPS63127385A - Graphic reproducing processor - Google Patents

Abstract

PURPOSE:To obtain a graphic with resulting small form difference compared with an original graphic, by magnifying and developing the contour information of an input graphic on a picture plane once, and performing a processing to correct and perform reductive conversion of a contour after painting out the inside of an image. CONSTITUTION:When the graphic is pictured by drawing and the paint-out of the contour on the picture plane of an image memory 10, a main control device 6 executes a reproduction processing. Firstly, arithmetic conversion to double the coordinate value of the contour point of the graphic is performed, and conversion in coordinate units corresponding to the drawing accuracy of the picture plane is performed. Next, the contour is lithographed on the picture plane with an approximate sequence of points according to the coordinate value. And next, the inside of a graphic image is painted out by using filter arithmetic calculation, and furthermore, reduction of 1/2 is performed by the filter arithmetic calculation. Width (2h+1) is converted to a mean (h) by applying the 1/2 reductive conversion by the filter arithmetic calculation. In such way, it is possible to obtain the graphic with resulting the small form difference compared with the original graphic.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an image processing device, and more particularly to a figure reproduction processing device that corrects shape errors when a figure given contour information is reproduced on a display device, etc. It is.

[Conventional technology]

In the conventional image processing device, as shown in FIG.
When converting the contour coordinates of an input figure to an arbitrary size to obtain a filled figure image, after converting the contour coordinates to the desired size, select the pixels on the image plane that are closest to the precision of the figure's outline. I drew a line segment with a width of 1 pixel and filled in the inside of it.

(Problem to be Solved by the Invention) As a result, on average, the shape increases outward by 0.5 pixels, and especially for small-sized figures, the shape changes rapidly after the reproduction process.

(Means for solving the problem (and operation)) According to the present invention, the coordinate values that give the outline of an arbitrary figure are arithmetic converted to a size larger than the desired size, and the figure contour according to the coordinate values is After drawing and filling in the interior, the filled graphic image is reduced in size, thereby correcting the bulk of the graphic that occurs when outlines are drawn on a display device or the like.

〔Example〕

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

FIG. 1 shows the configuration of a graphic reproduction processing apparatus according to the present invention. Reference numeral 6 denotes a main control unit MPU which controls the entire graphic reproduction processing apparatus, and performs graphic reproduction processing according to the flowchart of FIG. 2, which will be described later.

An external storage device such as a floppy disk (FD) or a hard disk (HD) is connected to this MPU 6.

Reference numeral 7 denotes a ROM in which various control programs for the MPU described above and a graphic reproduction processing program shown in FIG. 2 are stored.
(Read 0nly IAemory), 8 is the character data input from the outside via the pass line 9,
RAM (Ran) temporarily stores various other data.
dom Access Memory), 10 is an image memory (iMEM) that stores image data,
On the RAM 8 and iMEMlo, it is possible to develop a bit brain, which will be described later. A video memory (VRAM) 11 develops data to be displayed on the CR7 display section 12 on a bitmap. For example, if there is character data, the character corresponding to the code is developed on the VRAM, and a cursor is generated directly in the VRAM display area by the MPU 6's η1 control.
Display is possible. 13 is BMU (BitManupu
ration Unit) and RAM
8, i M E Ml 0, DMA (Direct Memory
8ccess) function.

14 is a printer, 15 is an interface that connects the printer 14 and Hassline 9, and 16 is a keyboard that can manually enter various data and commands.

Next, graphic reproduction processing of the image processing apparatus configured as described above will be explained from the beginning with reference to FIGS. 2 and 8.

When drawing a figure like the one shown in Fig. 4 (1) on the iMEMlo image brain by drawing the outline and filling it in, the second
The MPU 6 executes the reproduction process according to the flowchart 1 shown in the figure. First, in step S1, the coordinate values of the contour points of the figure shown in FIG. 4(1) are arithmetic converted to twice the desired size, and then the coordinate units are converted in accordance with the drawing accuracy of the image brain.

Next, according to the coordinate values obtained here, by drawing the outline on the image plane using a series of points that approximate straight lines and curves, it is possible to draw the outline on the image plane at twice the desired size and by drawing the contour line segments on the top, bottom, left and right sides. , the graphic image shown in Figure 4 (2) is obtained, with the top, bottom, left and right sides thickened by 0.5 pixels each (step S2).
.

Next, in step S3, the inside of this graphic image is filled in using the filter operation shown in FIG. 6, and then in step S4, the graphic image is subjected to η reduction using the filter operation shown in FIG. By the filter calculation shown in FIG. 5, as shown in FIG. 8 (1),
As shown in (2), a graphic image expressed with a width of 2n (n is a positive integer) is n or n- depending on the case where the expanded position starts from an even coordinate 2m or an odd coordinate 2m-1 (m is a positive integer). The probability of converting to a thickness of 1 and converting these two types is one by one. Also, Figure 8 (3).

As shown in (4), a graphic image expressed with a width of 2n+1 changes to a thickness of n-1 equally whether the developed position starts at an even numbered coordinate or an odd numbered coordinate.

will be replaced. Due to this filter operation! By the /2 reduction conversion, the width 2h+1 is converted to the average value.

[Other Examples]

How to correct the curve caused by the outline of a figure image! It can also be performed independently of the A reduction conversion. That is, when drawing a figure as shown in FIG. 4(1) on the iMEMlo image plane by drawing an outline and filling it in, it is also conceivable to perform reproduction processing according to a flowchart not shown in FIG. 3. First, in step S1, the coordinate values of the outline of the figure shown in FIG. 4(1) are arithmetic converted to twice the desired size. Next, by drawing the outline of the figure on the image plane using a series of points that approximate straight lines and curves according to the coordinate values obtained here, the outline of the figure is twice the desired size, and the upper and lower outline segments are further expanded. The graphic images shown in FIG. 4(2), each thickened by 05 pixels, are obtained (step S2). Next, this graphic image is painted in step S3 using the filter filter shown in FIG.
), the figure image is thinned by 1 pixel from the right and bottom each, and the width is 2 h + 1 (h = 0, 1,
2----) is converted to an average thickness of 2h (step S4). Next, percentage reduction is performed using the filter operation shown in FIG. With this filter, the top of the filled shape is on average 0.5 depending on the expansion position.
The lower part of the filled figure is reduced by y2 in a thin shape to the bottom of the pixel, and the lower part of the filled figure is thickened by 0.5 pixels on average depending on the development position. As a result, the average thickening error of one pixel due to the thickness of the contour line is corrected on the average regardless of the development position.

〔Effect of the invention〕

The present invention is a figure reproduction processing device that once expands and develops the outline information of a human-powered figure on an image plane as described above, fills in the figure image, and then corrects the outline and performs a reduction process. Therefore, there is an effect that a figure with a smaller difference in shape from the original figure can be obtained than a conventional device that draws the outline as it is.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a graphic reproduction processing device of the present invention, FIG. 2 is a diagram showing a graphic reproduction processing flow of an embodiment, and FIG. 3 is a diagram showing a graphic reproduction processing flow of another embodiment. , Fig. 4 is a diagram showing a contour figure developed on an image plane, Fig. 5 is a diagram showing a collapsing reduction filter calculation, Fig. 6 is a diagram showing a thinning filter calculation, and Fig. 7 is a diagram showing other local reduction filters. FIG. 8 is a diagram showing an example of the reduction of a graphic image when a % reduction filter operation is applied. FIG. 9 is a diagram showing an example of the expansion of a graphic onto an image plane. 6----MPU. 7----ROM. 8----R.A.M. 10---i MEM. 11---VRAM. 12---CRT. 1 3-1--B M U. 14---Printer, 1 5---17F, 16---Keyboard.

Claims (1)

[Claims] a coordinate value input means for inputting coordinate values on the outline of an arbitrary figure; an enlargement conversion means for enlarging and converting the coordinate values of the outline of the figure inputted by the coordinate input means by an arbitrary number of times; and conversion by the conversion means. The figure image filling means draws the figure outline as a figure image on the image plane according to the coordinate values and fills the inside of the figure image, and the reduction conversion means reduces the filled figure image to the original figure size. Graphic reproduction processing device.