JPS60140469A - Pattern enlargement contraction device - Google Patents

Abstract

PURPOSE:To allow natural and neat enlargement and contraction display for an original pattern by constituting a reference matrix so that holltone dots will decrease when an enlargement ratio becmes higher and the holltone dots will increase when a contraction ration becomes higher. CONSTITUTION:A dot operation part 14 outputs position information of dots which should be taken out from a reference matrix in accordance with magnification information inputted from a magnification specifying part 12. A reference matrix correspondence part 15 takes out the reference matrix which correspondence to the matrix outputted from a matrix extraction part 13 from a reference matrix accumulation part 17, and transmits the reference matrix to a dot density decision part 16. The reference matrix is constituted in such a way that a an enlargement ratio becomes higher, the parts of the halftone dots decrease, and as a contraction ratio becomes higher, the parts of the halftone dots increase.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a pattern enlarging/reducing device that is capable of naturally and beautifully enlarging/reducing an original pattern when displaying a character pattern, a binary image, etc. by enlarging/reducing it. Regarding.

[Technical background of the invention and its problems]

With the development of information processing technology, character patterns, binary images, etc. are input, edited, and visualized by displaying the images. During this editing work, attempts have been made to scale and display character patterns, binary images, etc. on the screen using certain parameters. This parameter is, for example, a distance inverse proportional density conversion method in which the density of the dot to be output is determined by weighting the density of the surrounding dot in inverse proportion to the distance between the dot to be output and the surrounding dots of the original data. In the conventional method, it has been proposed that the reference dot distribution obtained by this distance inverse proportional density conversion method is stored in ROM in advance, and extremely high-speed density conversion can be performed without performing complex numerical calculations. . The dot data corresponding to the dot address to be outputted is read from the ROM and an enlarged or reduced character pattern is obtained. Conditions at this time include the naturalness and beauty of the converted pattern when compared with the original pattern. However, in the conventional method described above, the ROM
Some dots have multiple distributions of reference dots stored in them depending on the magnification rate. An algorithm has been discovered that can produce visually natural patterns using black, neutral colors, and white. For example, in Figure 1, the character pattern is enlarged to 7
However, as the magnification increases (for example, 4x or higher), the intermediate color part of the dots increases, so the border between the white dots and black dots of the converted pattern looks blurred due to the intermediate color. There were drawbacks. Also, Figure 2 shows a reduced character pattern, but as the reduction rate increases (for example, 1/4 times or more), the thinned out portion of the dots to be referenced increases, and the intermediate color portion of the converted pattern also decreases. However, there was a drawback that the rectangularity of the outline made the connecting lines of the dots look unnatural. In other words, no device has been invented that is satisfactory in terms of naturalness and beauty when comparing the converted pattern with the original pattern.

[Purpose of the invention]

An object of the present invention is to provide an apparatus that can generate a natural and beautiful pattern by comparing it with the original pattern when enlarging or reducing a single character pattern, binary image, etc. on a screen.

[Summary of the invention]

According to the magnification information inputted from the 1 magnification specifying section from the pattern output multiple times from the pattern generating section, for example,
Sequentially extracting a 2×2 matrix of 2 dots each in the Y direction 2
×2 matrix extraction section; a reference matrix storage section storing a reference matrix consisting of dots of at least three shades of black, intermediate color, and white for each pattern of the 2×2 matrix and for each magnification to be enlarged/reduced; A reference matrix corresponding to the 2×2 matrix pattern outputted from the matrix extraction unit a reference matrix correspondence section that reads out the reference matrix based on pattern correspondence conditions; a dot operation section that outputs positional information of dots to be extracted from the reference matrix according to magnification information input from the magnification specifying section; and this dot operation section. a dot density determination section that selects and outputs corresponding dots in the reference matrix outputted from the reference matrix correspondence section according to the position information output from the reference matrix; and a display section that appropriately superimposes and displays the input magnification information, and in the reference matrix, the number of intermediate color dots decreases as the enlargement rate increases, and the number of intermediate color dots increases as the reduction rate increases. It is structured as follows.

〔Effect of the invention〕

According to the present invention, it is possible to obtain a converted pattern that is more natural and beautiful than the original pattern, which makes it easier to see visually and improves practicality.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram of one embodiment of the present invention.

A series of processes for enlarging/reducing a character pattern according to given magnification information in this embodiment will be described.

In FIG. 3, numeral 11 is a character pattern generation section that outputs a dot pattern of characters expressed in binary, and 12 is a magnification that inputs magnification information when enlarging or reducing the character pattern output from the character pattern generation section 11. This is the specification part. 13
is a 2×2 matrix extraction unit, which sequentially extracts each 2-dot (2×2) matrix in the X and Y directions from the character pattern output from the character pattern generation unit 1, and refers to the matrix correspondence unit 15 to be described later. Output to. At this time, the method of extracting the 2×2 matrix is different depending on whether the magnification information input from the magnification specifying unit 12 is enlargement or reduction. In the case of enlargement, adjacent 2×2 matrices in the character pattern are sequentially extracted as shown in FIG. In the case of reduction, the extraction method differs depending on the reduction rate. When the reduction ratio is 1/2, as shown in FIG. /3, as shown in FIG. 5(b), the 2X2 matrix is taken out by skipping twice in both the X and Y directions compared to the taking out method shown in FIG. , according to the magnification information input from the magnification specifying section 12, outputs the position information of the dots to be extracted according to the reference matrix described later.For example, in FIG. This indicates that one dot is inserted in between. In this case, the reference matrix is (16 dots) x (
16 dots), the position coordinates of the dots to be extracted are (o, o), (o, s), (0, 16).

(s, o), (s, s), (8, 16), (16°o)
, (16,8), (16,16). In the case of reduction, the position coordinates of the four dots in the 2×2 matrix are converted according to the reduction rate and output.

In Fig. 6(b), 2×27 when the reduction ratio is 1/2)
The positional coordinates of the dot to be extracted in order to convert the IJ square into a central dot are (8, 8). (Accurately speaking, the magnification here is 2x because even if the magnification is 15x, it will be 2x if rounded off.) When the reference matrix corresponding part is 15 degrees, the 2x2 matrix extraction part 13 2x2 matrix with multiple outputs.

A process is performed in which a reference matrix, which will be described later, corresponding to the matrix is taken out from the reference matrix storage section 17 and sent to the dot density determination section 16. 2x2 matrix black.

The combination of white dot placement is basically as shown in Figure 7(a)~
There are only four types shown in (d) (this will be called the basic matrix). Other combinations can be matched by rotating or inverting the basic matrix. The reference matrix was created by increasing the number of dots in the four types of basic matrices as shown in Figure 8 (a) to (d) and increasing the resolution), and assigning density values to these dots according to the black and white pattern of the basic matrix. It is something. In Figure 8, (1
A reference matrix of 6 dots)×(16 dots) is given four levels of grayscale values: O (white), 1.2 (intermediate color), and 3 (black) by the above-mentioned distance inverse proportional density conversion method. These reference matrices are separated by patterns of their base matrices (
In FIG. 8, four types) are stored in the reference matrix storage unit 17, and each of these is further divided into a plurality of types depending on the magnification side or magnification range to be enlarged or reduced. For example, as shown in Figure 9, the magnification is 1/2 or more.
If the value is less than 1, refer to Figure 9 (C).) IJ scale 1 magnification 2
When the magnification is less than 4, use the reference matrix in Figure 9 (dl); when the magnification is 4 or more, use the reference matrix in Figure 9 (e), and the magnification is 1/
If it is 4 or more and less than 1/2, refer to Figure 9 (b)) IJ
When the magnification is less than 1/4, Fig. 9 (reference matrix for al. These reference matrices) In the case of IJ magnification, as the magnification increases, the intermediate color dot portion 1.2 decreases.

Further, as the reduction ratio increases, the number of intermediate color dots increases. In Figure 9, intermediate color dot 1
, 2, the black dots 3 and white dots 2 are increased or decreased in inverse proportion to the scaling ratio. For example, the upper limit of the magnification in FIG. 9(C) is 2, and the upper limit of the magnification in FIG.
Since that of d) is 4, the width of intermediate color dots 1 and 2 in FIG. 9 (dl) in the X and Y directions is 1/2 of that in FIG. 9(C).

The reference matrix correspondence section 15 correlates the -j2X2r matrix with four types of basic matrices and takes out the reference matrix corresponding to the matched basic matrix from the reference matrix storage section 17. For example, if the 2×2 matrix shown in Figure 10(a) is rotated 1000 times and the black and white are inverted, (
These will be referred to as pattern correspondence conditions), resulting in a basic matrix shown in FIG. 10(b), and a reference matrix (FIG. 10(C)) corresponding to this is extracted. Next, the reference matrix correspondence unit 15 reads out the reference matrix based on the pattern correspondence conditions when the 2×2 matrix is made to correspond to the basic matrix. For example, Fig. 10 (al, (bl)
Under the pattern correspondence condition, since the rotation is 1800, the reference matrix is read out from the direction of the arrow in FIG. 10(C). This results in the reference matrix shown in FIG. 10(d), which is also inverted in black and white based on the pattern correspondence conditions. When reversing black and white, 0 (white) → 3 (
black), 1 (intermediate color) → 2 (intermediate color). The reference matrix extracted in this way is sent to the dot density determining section 16. The dot density determination section 16 selects the corresponding dots in the reference matrix based on the positional coordinates of the dots to be extracted in the reference matrix sent to the dot operation section 14, and displays the dots in a matrix configuration, which will be described later. Output to 18. FIG. 11(a) shows the matrix after dot insertion, which is a 2×2 matrix enlarged twice. This is d, ~d.

It is made up of insertion dots d6 to d8 and four corner dots d6 to d8. FIG. 11(b) is a reference matrix corresponding to this 2×2 matrix. The dot density determination section 16 selects the corresponding dots in the reference matrix from the position coordinates of d, to d, sent from the dot operation section 14, and creates a matrix configuration as shown in FIG. 11(C) on the display section 18. Output to. (Similarly, the selected dots may be output as they are without forming a matrix.) In the case of reduction (1/2), the position coordinates of one dot at the center of the matrix are used to determine the position of one dot at the center of the reference matrix. be singled out. The matrix made up of the dots extracted in this way is displayed on the display section 18.
sent to. If the magnification information is an enlargement rate, the display section 18 displays a matrix consisting of the previously extracted dots and the current dot (these are 2x2 matrices that are adjacent to each other in the character pattern before conversion). Display them in an overlapping manner as shown in . The logic of this superposition is the sum of the dot density values O to 3, and if the sum is 3 or more, it is uniformly set to 3. If the magnification information is a reduction ratio, no superimposition is performed and the dots with density added are displayed as they are. The above-described processing continues until all character pattern conversions are completed.

The character pattern thus obtained is shown in FIG. 1st
Figure 3 (a) shows the character pattern in Figure 1 enlarged at the same magnification using this example, but the middle color part of the 5 dots is reduced and the outlines of the black and white dots become clearer. The pattern is easy to see visually. Also the 13th
Figure (b) shows the character pattern in Figure 2 reduced at the same magnification using this example, but the intermediate colored parts of the dots have increased and the outline parts have become smoother and visually visible. It is an easy pattern.

As described above, according to the present invention, it is possible to obtain a dot pattern of characters, images, etc. as a natural and visually easy-to-see pattern, which is very convenient in practice. Similarly, the present invention is not limited to the above embodiments. In this embodiment, the density value of the reference matrix is set to four levels from 0 (white) to 3 (black), but the invention is not limited to this case. Also, see Ma)
The number of dots in the IJ box is not limited to 16x16 either.

Further, although the reference matrix uses a dot pattern with density, this can be replaced with area data indicating each range of density values from 0 (white) to 3 (black).

In this case, the dot density determination section performs processing to check to which area data range the dot whose density is to be determined belongs. By replacing it with area data in this way, the capacity of the reference matrix can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing examples of conventional character patterns, Figure 3 is a block diagram of an embodiment of the present invention, and Figure 4 is a diagram showing how to extract a 2x2 matrix in the case of enlargement. , Figure 5 is a diagram showing how to extract a 2x2 matrix in the case of reduction, Figure 6 is a diagram showing how to insert and convert dots in a 2x2 matrix, and Figure 7 is a diagram showing a 2x2 matrix and a basic matrix. 8 is a diagram showing the configuration of the reference matrix, FIG. 9 is a diagram showing the difference in dot distribution of the reference matrix depending on the scaling ratio, and FIG. 10 is a diagram showing the processing of the reference matrix). 11 is a diagram showing the processing of the dot density determining section, FIG. 12 is a diagram showing the processing of the display section, and FIG. 13 is a diagram showing an example of a pattern after processing using the present invention. DESCRIPTION OF SYMBOLS 11... Character pattern generation part, 12... Magnification specification part, 13... 2x2 matrix extraction part, 14... Dot operation part, 15... Reference matrix correspondence part, 16...
- Dot density determination section, 17... Reference matrix accumulation section,
18...Display section. Agent: Patent Attorney Noriyuki Chika (and 1 other person) No. 1
Figure 2 (α) (b) o o, o o o o --- Figure 6 Figure 7 (dsu 0 translation 0 ・Figure 9 〇-, 4) (, Ishi 4) [hand, ? ) [n, 4) [
4, + evil) Figure 8 1,, l 1. j IJ IJ IJ IJ U IJ
LiliriULiliLJLJ000000000000000
0 Figure 8 Figure 10 J Figure 12. 0.・・・ ・ @ ■ O's ・ (Otsushin (Muku)

Claims (1)

[Claims] a pattern generation section; a magnification specifying section for inputting magnification information for enlarging/reducing the pattern output from the pattern generation section;
an m×n matrix extraction unit that sequentially extracts an m×n matrix of m dots in the direction and n dots in the Y direction according to the magnification information input from the magnification specifying unit; and a magnification to be enlarged or reduced for each dot pattern of the m×n matrix. Reference 1 consists of three levels of shading dots: black, medium color, and white.
a reference matrix storage unit storing the matrix, and the m
A reference matrix that searches the reference matrix corresponding to the dot pattern of the m×n matrix outputted by the n matrix extraction unit in the reference matrix storage unit according to the magnification information input from the magnification designation unit and reads out the reference matrix. a dot operation section that outputs position information of a dot to be extracted from the reference matrix according to the magnification information input from the magnification specifying section; and a reference matrix correspondence section according to the position information output from the dot operation section. and a dot density determining section that selects and outputs corresponding dots of a reference matrix outputted from the reference matrix, and the reference matrix is configured such that as the enlargement rate increases, the number of intermediate color dots decreases, and as the reduction rate increases, the number of intermediate color dots increases. A pattern enlarging/reducing device comprising: