JPS59188691A - Display pattern conversion processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention provides a display pattern in which each constituent pixel of a graphic pattern is converted into a dot pattern, and the refined converted pattern is displayed on a cathode ray tube or printed on paper. The present invention relates to a conversion processing device.

<Background of the Invention> Conventionally, when displaying or printing a graphic pattern, each constituent pixel of the graphic pattern stored in a storage means is converted into a dot pattern of a predetermined multiple (for example, 2 dots vertically x 2 dots horizontally) to make it more detailed. This is displayed or printed.

However, the display pattern produced by this type of method has a step-like shape with discontinuous contour lines in the diagonal direction, which causes problems such as deterioration in the quality of the display pattern.

<Object of the Invention> In order to solve the above-mentioned problems, the present invention provides display pattern conversion that improves the quality of display patterns by devising the dot arrangement of dot patterns to be converted for each constituent pixel of a diagonal contour line in a figure pattern. The purpose is to provide processing equipment. .

<Configuration and Effects of the Invention> In order to achieve the above object, the present invention includes a first storage means for storing a graphic pattern consisting of a plurality of pixel data, and a central and dot pattern setting means for setting the dot arrangement of pixels, and when displaying or printing the pattern, the dot pattern setting means reads the graphic pattern from the first storage means and sequentially arranges the dots for each constituent pixel of the graphic pattern. After conversion, the dot pattern is written into the second storage means to form a converted pattern.

According to the present invention, even if the diagonal contour line of a figure pattern has a discontinuous step-like shape, it can be converted into a pattern with a smooth contour line, and the quality of the displayed pattern is greatly improved, thereby achieving the purpose of the invention. Achieve excellent results.

<Description of Embodiments> FIG. 1 shows an example of a circuit configuration of a display pattern conversion processing device according to the present invention.

In the figure, dot pattern setting means 1 consisting of a CRT controller is operated by a CPU (Central Processor).
ng Unit), and is stored in the fourth storage means 3. Second. It controls the writing and reading of data to and from the third storage means 2, 4.5, and also controls the CRT (Cat
(RayTube) 6 and the printing operation of a printer (not shown).

The first storage means 2 is a P-ROM (Program
-mable ROM), and stores a large number of graphic patterns to be displayed or printed.

The second storage means 4 is an R-RAM (Refresh memory).
-RAM), and each constituent pixel of the figure pattern (
This is for forming a turn by sequentially writing the dot arrangement set by the rough dot pattern setting means 1.

The third storage means 5 is composed of the same R-RAM and is used to write the figure 7N+' turn read from the first storage means 2 during the dot pattern conversion process.

The fourth storage means 3 is a ROM (Read Only M
emorγ) for executing dot pattern conversion processing (Fig. 6).

8 and 9A and D) are stored.

FIG. 2(1) shows an example of a graphic pattern stored in the first storage means 2. In FIG. In the case of the illustrated example, it is composed of pixels of 7 bits vertically by 5 bits horizontally, and the graphic pattern of the illustrated example related to the number "3" has a pixel data arrangement in which white circles are black pixels (no marks are white pixels). In this figure pattern, the dot pattern setting means 1 sets a certain pixel range X
(In the illustrated example, 3 pixels vertically x 3 pixels horizontally), and the presence or absence and position of black pixels are determined for the central pixel 3 and surrounding pixels b (see Figure 2 + 1) (2)),
As shown in FIG. 2(3), the dot arrangement of each constituent pixel is determined. In this embodiment, one pixel is composed of 2 vertical dots x 2 horizontal dots, and the determined dot pattern D of each pixel is sequentially written into the second storage means 4 (see (4) in Fig. 2).
reference). Similarly, if all pixels are subjected to rough pattern conversion, a conversion pattern is obtained in which diagonal contour lines exhibiting a discontinuous step shape are particularly refined, as shown in FIGS. 5(1) to 5(3). In Fig. 5 +1.+21 +31, the left side shows the basic figure pattern, and the right side shows its conversion pattern.

3 and 4 show the relationship between the black pixel data arrangement of the center pixel 3 and its surrounding pixels and the converted dot pattern D for the center pixel λ.

FIG. 3 shows an example where the center pixel a is black pixel data (32 patterns in total), and the dot pattern D of the center pixel λ to be converted has a form in which some dots are omitted. Furthermore, Fig. 4 shows an example where the center pixel a is not black pixel data (
There are 80 patterns in total), and the dot pattern D of the center pixel a to be converted takes the form of adding dots. Other pixel arrangements (total 40
If the number is 0, a dot pattern with no dots missing or added is formed, and in the case of this embodiment, there are a total of 512 types of conversion data.

FIG. 6 shows the operational flow of the pattern conversion process. First, in step 10, the row counter m and column counter n of the dot pattern setting means are initialized. Next, in step 11, a predetermined graphic pattern is read out from the first storage means 2, and this read pattern is set in the third storage means 5. Thereafter, with respect to this reading pattern, the first pixel data for nine pixels is taken into the shift register of the dot pattern setting means 1, and in the next step 12, dot pattern setting processing is executed for the center pixel. In addition, when capturing data for 9 pixels, the 7th
As shown in the figure, when the center pixel a is located at the edge, the shaded area in the figure is treated as white pixel data.

Next, in step 13, the corresponding dot pattern I] is written into the corresponding bit position of the second storage means 4. Then, in the next step 14, it is determined whether the above-mentioned processing such as pattern conversion has been executed for all pixels in the first row, and in this case, the determination of "rn=5" in step 14 is "No".
”, and in the next step 15, the contents of the column counter n are incremented by 1, and the process moves to the second column.

In this way, each process of steps 11 to 13 is repeatedly executed until the content of the column counter n reaches "5", and step 1
When the 40 determination becomes "YES", the process proceeds to step 16. Step 16 is to check the contents of the row counter m, and in this case, rm=
The determination in step 7J is "No", and in step 17, the content I of the row counter m is incremented by 1, and the column counter n is returned to its initial value. Then, the process moves to the second line and similar repeated processing is executed, and this repeated processing is further executed until the determination of rm-7J in step 16 becomes "YES".

8 and 9A and 9D show detailed flows of the dot pattern setting process.

First, in step 21 of FIG. 8, it is determined whether or not the center pixel is a black pixel in a range of 3 pixels vertically by 3 pixels horizontally. If the center pixel is a white pixel, the determination in step 21 is °'NO.
``'', and the flow shifts to the flow shown in FIG. 9A. If the center pixel is a black pixel (as shown in FIG. 10 (1) I), the determination in step 21 becomes ``= Y E S '', and the following steps are performed. In steps 22 to 25, it is determined whether or not there are black pixels at the corner position among the surrounding pixels. Thus, if the number of black pixels at the corner position is 0, the determination in step 22 is '
If YES'', the process proceeds to step 26 and the current dot arrangement of the figure pattern, that is, D1 shown in FIG. 11 (1)
The pattern is set in the corresponding position of the second storage means 4. On the other hand, when the number of black pixels at the corner position is 1 (Fig. 10 (2)
), step 22 is “NO″’, step 23
becomes “YES” and moves to the flow in Figure 9B.
Furthermore, when the number of black pixels at the corner position is 2 (Figure 10 (3)
+4) f), steps 22 and 23 are 'NO'
, step 24 becomes -YES"", and the process moves to the flow shown in FIG. 9C. Furthermore, if the number of black pixels at the corner position is 3 (as shown in FIG. 10 (5)), step 22゜23P
24 is ``NO'', step 25 is ``YES'',
Shifting to the flow of Figure 9, if the number of black pixels at the corner position is 4 (as shown in Figure 10 (6)), steps 22 to 25
are both 'NO' and the process proceeds to step 26, where the Di/2 turn is set in the second storage means 4.

When the aforementioned center pixel is a white pixel, first in step 31 of FIG. 9A, it is determined whether the total number of surrounding black pixels is seven or more. If the determination in step 310 is YES (10th W+7) l(-t), the current dot arrangement of the figure pattern, that is, D6 shown in FIG. 11(6).
The pattern is set in the second storage means 4. On the other hand, if the determination in step 31 is "No", the process advances to step 33, where it is checked whether black pixels exist at two midpoint positions between the corners and whether or not the black pixels are located adjacent to each other. Ru. And if step 33 is "YES" (Fig. 10 (
8)), then in step 34, the presence or absence of a black pixel is checked at corner position A in the figure. If there is no black pixel at corner position A, step 34
The determination becomes ='YES'' and the process proceeds to step 35, where the D2 pattern shown in FIG. 11(2) is set in the second storage means 4.

Further, if a black pixel exists at the corner position B, step 34
The determination is "NO" and the process proceeds to step 32, where the D6 pattern without dots is set. If Steps 31 and 33 are ``NO'', it is checked in the next step 36 whether or not there are black pixels at 3 midpoint positions between the corners. There are black pixels at one or four locations, and the determination in step 36 is '
If NO''' (as shown in Figure 10 (9) (river)),
Proceeding to step 38, the D6 pattern shown in FIG. 11 (6) is set in the second storage means 4. , on the other hand, if the determination in step 36 is "YES" (as shown in FIG. 10 (II)), in step 37, the corner position A in the same figure is
, B is checked to see if there are any black pixels. Then, when there are black pixels in both painter positions A and B, step 3
7=-YES" and the process proceeds to steps 3 and 8.

In addition, when there is no black pixel at B in the painter 9, step 37 is NO'', step 39 is YES'', and step 40 shows that the D3 pattern shown in FIG. When there are black pixels on one side,
Steps 37 and 39 become 'NO', and in step 41, the D2 patterns shown in FIG. When the number of black pixels in is 1 (Figure 10 (12)
In step 51 of FIG. 9B, it is checked whether a black pixel exists at intermediate positions A and B of the side opposite to the corner where the black pixel exists. When there are no black pixels at both positions A and B, the determination in step 51 is "NO" and the process proceeds to step 52, where the D1 pattern is set in the second storage means. Also, positions A and B
If a black pixel exists in either one of the
The 0 judgment becomes °'YES"', and then step 53
, it is checked whether a black pixel exists at a position C or I opposite to a position A or B where a black pixel exists. If a black pixel exists, the determination in step 53 is '
If the result is "NO", the process proceeds to step 52, and on the other hand, if there is no black pixel, the result of step 53 is "-YES", and the process proceeds to step 54, where the D4 pattern shown in FIG. 11 (4) is stored in the second storage means. Set to 4.

Next, if the center pixel is a black pixel and the number of black pixels at the corner position is 2 (shown in FIG. 10 [131 (141)), in step 61 of FIG. If the determination in step 610 is 'NO''', that is, both black pixels are in adjacent positions (shown in FIG. 10 (+3+)), the next step 6
In step 5, it is checked whether the black pixel arrangement is such that black pixels exist at positions A and B in the figure and no black pixel exists at position C2P. And step 650 judgment is -YE
If the answer is 'S', proceed to step 66 and select the D3 pattern shown in FIG. 11(3); if 'No', proceed to step 67.
Then, the D4 pattern shown in Fig. 11 (1) is the second
is set in the storage means 4 of. On the other hand, if the determination in step 61 is "YES", that is, the two black pixels are at diagonal positions (as shown in FIG. 10 (14)), the next step 62
In this step, it is checked whether or not the black pixel arrangement is such that black pixels exist at positions A and B in the figure, and a black pixel or no black pixel exists at position C2D. And step 620 judgment is 'YES'
”, proceed to step 63 and select the D5 pattern shown in FIG. 11 (5), or if “NO”, proceed to step 6.
4, each pattern is set in the second storage means 4.

Next, the center is a black pixel, and the number of black pixels at the corner position is 3.
(shown in FIG. 10 (15)), in step 71.73 of the ninth diagram, positions A, B and C in the same diagram,
The presence or absence of black pixels for D is checked. and position A.

If there is a black pixel in B and there are no black pixels in positions C and D, steps 71 and 73 are both YliS'',
In step 74, the D5 pattern shown in FIG. 11(5) is set in the second storage means 4. Also, positions A and B
If there is no black pixel, step 71 or 'NO'''
If there are black pixels at positions A and B and positions C and D, step 73 becomes "No'" and the process advances to step 72.
is set to

[Brief explanation of the drawing]

Figure 1 is a circuit block diagram of the display pattern conversion processing device.
Figures 2 (1) to (4) are diagrams for explaining the dot pattern conversion process, and Figure 31! H1) to (5) and Figure 4 (
1) to (13) are explanatory diagrams showing the relationship between black pixel data arrangement and dot pattern, Fig. 5 (1) to (3) are explanatory diagrams showing examples of dot pattern/tone conversion, and Fig. 6 is an explanatory diagram showing the relationship between black pixel data arrangement and dot pattern. Flowchart showing the conversion processing operation, Figures 8 and 9 A and D are flowcharts showing the dont nocturne setting processing operation, and Figures 10 (1) to (15) show examples of black pixel arrangement. Explanatory diagrams, FIGS. 11(1) to 11(6) are explanatory diagrams showing examples of dot patterns. 11. ...Dot pattern setting means 2...
...First storage means 4 ...Second storage means Patent applicant Tateishi Electric Co., Ltd. Masu 62 Bamboo 2 Figure (1) C2)
(3) Old days 4-Figure (1) t:h
C3) Fang, 0 times 1 = Interpretation procedure amendment <E) P, method> G, Indication of incident 1982 Patent Application No. 64182
No. 2, Title of the invention Display pattern conversion processing device 3, Person making the amendment Relationship to the case Patent applicant Address 10 Hanazono Dodo, Ukyo-ku, Kyoto Name (294) Tateishi Electric Co., Ltd. Representative Takao Tateishi 5 Subject of the amendment Corrected to "only one of them". "'"""IJ page 14, line 1 r position c, P
Jwo! (-, corrected to DJ. (3) In the drawings, "Fig. 9 CJr Fig. 10" has been corrected as shown in the attached sheet.

Claims (1)

[Claims] A first storage means for storing a graphic pattern consisting of a plurality of pixel data; a graphic pattern is read out from the first storage means and dots are arranged based on the data distribution f4 between each constituent pixel of the graphic pattern and its surrounding pixels; A display pattern conversion processing device comprising: a dot pattern setting means for determining a dot pattern; and a second storage means for writing a dot pattern set by the dot pattern setting means to form a converted pattern of a figure pattern.