JPS63205693A - Expanded character generation system - 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 <Industrial Application Field> The present invention provides a method for reducing steps that occur in enlarged diagonal areas when a character pattern composed of a dot matrix is enlarged to a vertical magnification of MX and a horizontal magnification of N. M×N corresponding to each dot
The present invention relates to an enlarged character generation method for adding or deleting correction dots to the corners of a rectangular pattern consisting of individual dots.

<Prior Art> Generally, when a character pattern composed of a dot matrix is enlarged by M times vertically and N times horizontally, each dot in the original pattern is enlarged by M, which is all black or white, as shown in Fig. 9.
A rectangular pattern of ×N dots is developed onto the memory. For example, 3 x shown on the left side of Figure 10
When the knit matrix (3) is enlarged 3 times vertically and 3 times horizontally, it becomes as shown on the right side of Fig. 10. Now, with this method, 24
When an English character [transfer 2] made up of a dot matrix of ×2·l is enlarged, the generated character will have noticeable steps in the enlarged diagonal area as shown in FIG. 12, and the quality of the enlarged character will deteriorate.

Therefore, the applicant of the present application has recently proposed an enlarged character generation method to solve such problems (Japanese Patent Application No. 61-2212).
No. 07). This enlarged character generation method searches for the circumstances of the eight surrounding dots for each dot to be enlarged in the original character pattern, and determines whether the dot to be enlarged is a black dot and the three dots at any of the surrounding corners are white. When the dot is a dot, the black dot is deleted from the corner corresponding to the above corner of the enlarged rectangular pattern consisting of black dots, and conversely, if the dot to be enlarged is a white dot and any of the surrounding corners are sandwiched 2 When the dots are at least black dots, the black dots are added to the corners corresponding to the corners of the enlarged rectangular pattern made of white dots to reduce the level difference occurring in the diagonally lined parts of the enlarged characters. In other words, this enlarged character generation method is illustrated in Figure 1+(a) in the original character pattern! dot vs 1
The area where the dots are stepped is enlarged while being corrected so that it becomes smooth after enlarging.

<Problems that the invention is unlikely to solve> However, when the kanji ``trans'', which is the same as junren, is enlarged using the above enlarged character generation method, it becomes as shown in Figure 13,
There are still noticeable steps in the enlarged diagonal areas, and it is difficult to say that the quality of the enlarged characters is sufficient. Needless to say, such a step becomes more noticeable as the magnification increases.

Therefore, it is an object of the present invention to appropriately search the surrounding dot situation and, based on this search result, to locate a part of the original character pattern that has a difference in level between two dots and one dot as illustrated in FIG. 11(b). However, it is an object of the present invention to provide an enlarged character generation method capable of generating high quality enlarged characters that are smoother than conventional ones and have no steps, through correction that takes into account correction that makes the characters smooth after enlargement.

<Means for Solving the Problems> In order to achieve the above object, the enlarged character generation method of the present invention creates enlarged diagonal lines at the corners of a rectangular pattern of M×N dots corresponding to each dot in the original character pattern. In an enlarged character generation method that adds or deletes correction dots to reduce the difference in height that occurs in the original character pattern, the situation of the 16 dots around the chest is searched for each dot in the original character pattern, and the situation of the surrounding dots is searched. For the black and white dots to be enlarged, it is determined whether the surrounding situation of the dot matches a predetermined black and white matching pattern, and the M×N dots corresponding to the dots whose surrounding situation is determined to match are determined. At the corners of the rectangular pattern, according to the black and white matching pattern above,
The present invention is characterized in that a correction dot is added or deleted in a triangular area of a scalene triangle or an equilateral triangle to reduce the step difference that occurs in the enlarged diagonal area.

<Operation> When the situation of the searched surrounding dots of the black and white dots to be enlarged matches a predetermined black and white matching pattern, the corners of the rectangular pattern of M×N dots corresponding to the black and white dots are Then, according to the black-and-white matching pattern, correction dots are added or deleted in triangular areas of scalene triangles or equilateral triangles, and the step difference that occurs in the diagonal line portion of the enlarged character is alleviated.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

Figure 2 is a block diagram showing an example of a device used in the enlarged character generation method of the present invention, where l is a character generator that generates and holds an original character pattern consisting of a dot matrix, and 2 is an original that is sent from this character generator l. The original character pattern storage buffer 3 that stores the character pattern compares the situation of 16 dots surrounding each dot to be enlarged in the original character pattern sent from the original character pattern storage buffer 2 with a predetermined black and white matching pattern. The surrounding situation search unit 4 enlarges the dots to be enlarged into a rectangular pattern of a predetermined number (for example, 6×6) of dots, and the surrounding situation search unit 4 searches at the corners of the enlarged rectangular pattern. An enlarged pattern generation section 5 adds or deletes correction dots in a triangular area of a scalene triangle or an equilateral triangle based on a correction control signal according to a black-and-white mapping pattern manually inputted from the enlarged pattern generation section 4. This is an enlarged character pattern storage buffer that stores an input enlarged character pattern.

As shown in FIG. 2, the surrounding situation search unit 3 searches for the situation of 16 dots indicated by circles around the central black or white dot A to be enlarged.

FIGS. 3 and 4 are diagrams showing the rules for generating a rectangular pattern when the dot A to be enlarged in the original character pattern is a black dot. The surrounding situation search unit 3 determines which of the black and white matching patterns shown in FIGS. 3(a) to 3(d) matches the surrounding situation of the black dot A, and performs 1. A correction control signal corresponding to the matching black and white matching pattern is output to the enlarged pattern generating section 4. The enlarged pattern generating section 4 receives the correction control signal and generates 6 corresponding to the black dot A.
From the corner of the rectangular pattern consisting of ×6 black dots,
Correction is performed to delete black dots as indicated by X marks in any of the figures (a)' to (d)'. For example, Fig. 3(a)
If white dots are dotted on the upper right corner of black dot A as shown in Figure 3(a)', delete the black dots from the upper right corner as shown in Figure 3(a)', and delete them as shown in Figure 3(C). If most of the area around black dot A is white, the black dots are not deleted at all as shown in FIG. 3(C)'. As can be seen from FIGS. 3(a)' to 3(d)', these deletions are performed in a scalene triangular area ((a )', (b)') or an isosceles triangular region connecting the approximate midpoints of the two sides ((d)'
(see). Further, this process is performed a total of four times for the black dot A to be enlarged, once every week as shown in FIGS. 4(a) to 4(d). That is, the process described in FIG. 3 above is the process for FIG. 4(a), and the white dots 1, 2, and 3 in FIG. When rearranged as shown in b) to (d), the black and white matching patterns obtained in the same manner as in FIGS. The same black dot deletion correction as described above is performed corresponding to the matching pattern.

5 and 6 are diagrams showing the rules for generating a rectangular pattern when the dot A to be enlarged in the original character pattern is a white dot. In this case, the surrounding situation search unit 3 determines which of the black and white matching patterns in FIGS. 5(a) to (e) the surrounding situation of the white dot A matches,
In accordance with the matching black and white matching pattern, the enlarged pattern generating section 4 prints the rectangular pattern of white dots A consisting of 6 x 6 white dots at the corners of the rectangular pattern shown in FIGS. 5(a)' to 5(e).
Add a black dot to one of ' as shown by the X mark.

The addition of these black dots is also shown in Figures 5(a)'-(
As is clear from e)', this is carried out in the scalene triangular area (see (b)', (d)') or isosceles triangular area (see (c)', (e)') similar to the above. Further, this process is performed a total of four times, once every week as shown in FIGS. 6(a) to (d), for the white dot A to be enlarged, which is the same as described above.

Using the apparatus configured as described above (see FIG. 1), enlarged characters are generated as follows.

Now, suppose that a part of the original character pattern generated by the character generator 1 (see FIG. 7(a)) is to be enlarged 6×6 times. The surrounding situation search unit 3 sequentially searches for the original patterns shown in FIG. 7(a) generated by the character generator 1 and stored in the original character pattern storage buffer 2. That is, the surrounding situation search unit 3 searches the situation of the 16 dots (see FIG. 2) around each black dot A and white dot B to be enlarged, as shown in FIGS. 3(a) to (d), FIG. 4, or Compare with the black and white matching patterns shown in Figures 5 (a) to (e) and Figure 6, determine which pattern matches, and enlarge the correction control signal corresponding to the matching black and white matching pattern. It is output to the pattern generation section 4. The enlarged pattern generating section 4 prints a pattern (see FIG.
a)' to (d)', deletion of the black dot marked with an X in either of Figures 1 or 5 (a)' to (e)', or marked with an X in any of Figure 6 Add black dots. The enlarged rectangular patterns thus corrected are sequentially output to the enlarged character pattern storage buffer 5 and stored therein.

As a result, the black dots A and white dots B in the original pattern in FIG. 7(a) are smooth and smooth with no difference in level from the surrounding rectangular dots, as shown by arrows A and B in the enlarged pattern in FIG. 7(b). Expanded to lead to. If the above processing is performed on all the dots of the original pattern, an ideal enlarged pattern that is smooth and has no level differences compared to the original pattern can be obtained, as is clear from FIG. 7(b).

FIG. 8 shows an example in which the above processing is applied to the kanji character "trans". It can be seen that, compared to the conventional method shown in FIGS. 12 and 13, the level differences occurring in the diagonally lined portions of enlarged characters are further reduced, and smooth and ideal enlarged characters can be obtained.

In the above explanation, we have described the case where the rectangular pattern is enlarged 6×6 times, but the above embodiment can also be applied when the vertical size is M times xlN times, as long as the corners of the rectangular pattern are corrected with triangular areas including scalene triangles. It goes without saying that it can be done.

<Effects of the Invention> As is clear from the above explanation, the enlarged character generation method that involves adding or deleting correction dots according to the present invention, for a dot that is about to be enlarged and whose surrounding 16 dots are searched, It is determined whether the surrounding situation matches a predetermined black-and-white matching pattern, and a scalene triangle or a scalene triangle or Since correction dots are added or deleted in the triangular area of an equilateral triangle, the difference in level that occurs in the enlarged diagonal area is significantly reduced compared to the case where the situation is searched for the surrounding 8 dots and the dot correction is performed only in the isosceles triangular area based on the situation search. It is possible to generate smooth, high-quality enlarged characters.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a device used in the enlarged character generation method of the present invention, FIG. 2 is a diagram showing the surrounding situation search range of a dot to be enlarged, and FIGS. 3 and 4 are diagrams showing a dot to be enlarged. An explanatory diagram of the rectangular pattern generation rule when is black,
5 and 6 are explanatory diagrams of the rectangular pattern generation rule when the dot to be enlarged is white, and FIGS. 7 and 8 are diagrams showing an example of character enlargement using the method of the present invention. Figures 9, 10, and 12 are diagrams showing conventional simple enlargement, and Figure 11.
The figure shows the inclined portions of 1 dot vs. 1 dot and 2 dot vs. 1 dot in the original character pattern, and FIG. 13 is a diagram showing an enlargement according to the conventional method. 3... Surrounding situation search unit, 4... Enlarged pattern generation unit. Patent applicant: Sharp Corporation Agent
Patent attorney Aohaku Ao and 2 others wE1 Figure': JJ4 Figure 3 (O) 1 (d)' Figure 7 Δ Freezing pattern (b) Enlarged nozu turn Figure 8

Claims (1)

[Claims] (1) When enlarging a character pattern composed of a dot matrix to a vertical magnification of M x a horizontal magnification of N, a rectangle consisting of M × N dots corresponding to each dot is created so as to reduce the level difference that occurs in the enlarged diagonal area. In the enlarged character generation method that adds or deletes correction dots to the corners of the pattern, the situation of the surrounding 16 dots is searched for each dot in the original character pattern, and the situation of the surrounding dots is searched and enlarged. For black and white dots, it is determined whether the surrounding situation of the dot matches a predetermined black-and-white matching pattern, and the corner of the rectangular pattern of M×N dots corresponding to the dot that has been determined to have a matching surrounding situation is determined. The enlarged character generation is characterized in that correction dots are added or deleted in triangular areas of scalene triangles or equilateral triangles according to the black-and-white matching pattern to alleviate steps occurring in enlarged diagonal areas. method.