JPH024548A - Enlarging method for character - Google Patents

Abstract

PURPOSE:To perform an interpolating at a high speed by obtaining an enlarged character interpolated by the combination of logic operations such as a shift, logic sum, logic product, etc. by utilizing a basic character font. CONSTITUTION:A CPU 3 reads out a basic character font from a character generator 1, and stores it in ROM/RAM 2. The collapse of a character is extracted by the combination of AND, OR logics of the basic character front and shifted font, enlarged, then shifted and executed for the AND thereof thereby to form correction dots of the collapsed part. The correction dots of the collapsed part is further combined with enlarged basic character font to obtain an enlarged character corrected from the collapsed part to be obtained at a high speed. According to this type, since the enlargement of a plurality of characters can be integrally conducted, its processing time can be largely shorted as compared with a conventional one character unit enlarging type.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a character enlarging method capable of obtaining high-quality enlarged character fonts from basic character fonts in dot-type character display devices, dot-type printers, etc. Regarding.

[Conventional technology]

As a conventional character enlargement method, for example, Japanese Patent Application Laid-Open No. 50-109
The one shown in Publication No. 25 is known.

This forms the base character font for each black (or white)
A group of NXN (N is a natural number) black (white) square array dots is generated for the points, and the points A to focus on are as shown in Figure 6: 1) Two points A in adjacent rows *, At+t are black dots and have an oblique relationship.

2) The point located in row i and in the same column as Al+1 is not black, and the point located in row i+1 and in the same column as A+ is also not black (see FIG. 6(b)).

When the interpolation conditions are satisfied, the enlarged sentence is interpolated using a group of dots arranged in a triangular shape with sides of width N dots. However,
In the conventional method described above, the interpolation conditions described above must be applied and checked for each dot that makes up the basic character font, so for normal characters, 16X
There is a problem in that the conditions are checked 16 times and the interpolation process takes a long time. Furthermore, since this is a discussion about one character, the more characters there are, the longer the interpolation time will be.

Therefore, an object of the present invention is to provide a character enlargement method that allows high-speed interpolation processing.

[Means to solve the problem]

Paying attention to the fact that the distorted part of the character shape occurs on the diagonal line of the dotted basic character font (which must be interpolated), the desired enlarged character is obtained by the following procedure.

② Perform a logical product between the basic character and its value shifted one dot to the right.

② Perform a logical product between the basic character and its value shifted one dot to the left.

■, Take the logical product of ■ and ■.

(2) Performs a logical AND between the basic character and its shifted position up one dot.

② Perform a logical product between the basic character and its value shifted down by one dot.

■, Take the logical product of ■ and ■.

■, Take the logical sum of ■ and ■.

□ Exclusive OR of ■, ■ and the basic character font.

Expand ■ and ■ by n (natural number) times.

[Phase] and ■ are logically ANDed with those shifted by n-1 dots to the right, left, up, and down.

■ Enlarge the basic character font by n times.

■, Take the logical sum of ■ and ■.

[Effect]

AND of the basic character font and the shifted version of this,
Extract the part where a misshapen part occurs due to the combination of OR logic, enlarge only this part, and then shift and A.
By executing ND, a correction dot for the broken part is created,
By further combining this with an enlarged version of the basic character font, the desired enlarged characters with corrected misshapen parts can be obtained at high speed.

〔Example〕

FIG. 1 is a flowchart showing an embodiment of the invention, and FIG.
The figure is a hardware configuration diagram for implementing this invention, Figure 3 is an explanatory diagram for explaining the basic character font and enlarged character font, and Figures 48 to 4F specifically explain the enlargement processing process. FIG.

First, explanation will be given starting from FIG. In the figure, a CPU 3 is a processing device such as a microcomputer that controls the entire system. The ROM/RAM 2 stores programs for the operation of the microcomputer 3, data for control, and dot data for enlarged characters. The character generator 1 stores dot patterns (font patterns) of basic characters. Font patterns such as quarter-width characters, half-width characters, and full-width characters are stored in this file in character code units.

The display controller 4 is provided for display control to display character data enlarged by the CPU 3. V
The RAM 5 stores display data to be displayed on the display device 6.
The 0 display device 6, which is a memory for storing dot patterns, displays enlarged characters, etc.
liquid crystal), CRT.

Various display elements such as plasma can be used. Note that a printer may be provided in place of the display device for printing.

The character enlarging method according to the present invention will be explained below with reference to FIGS. 1 to 4F.

First, C and PU3 read the basic character font from the character generator 1 (see Figure 1 ■), and ROM/R
Store on AM2. In the following explanation, the basic character font is 6 x 6 dots as shown in Figure 3(a).
The enlarged characters are 12×12 dots, which is twice the size shown in FIG. 3(b). The CPU 3 calculates the logical product R() of the basic character font shifted one dot to the right (see Figure 4A (a)) and the basic character font (see Figure 1 ■ and Figure 4A (c)). Similarly, take the logical product L(] of the basic character font shifted one dot to the left (see Figure 4A (b)) and the basic character font (see Figures 11 and 4).
(See Figure A (d)). Next, take the logical product ~ [ ] of the results of the above logical product (Figure 11 and Figure 4A (
(e) see).

Also, take the logical product U() of the basic character font shifted up by one dot (see Figure 4B (a)) and the basic character font (see Figure 1 ■ and Figure 4B (c)).
. Furthermore, the logical product D( ) of the basic character font shifted one dot downward (see FIG. 4B (b)) and the basic character font is calculated (see FIG. 1 (2) and FIG. 4B (d)).

Next, take the logical product V [] of the above logical product (see U [ ] in Figure 4B (c) and DC) in Figure 4B (d)) (see the first
(See Figure 1 and Figure 4B (E)).

The logical product result obtained by shifting one dot to the left and right (4th A)
(See H() in Figure (E))) and the result of logical product obtained by shifting up and down by one dot (See VC in Figure 48 (E))) (Figure 1) ■ and Figure 4C (a)
By further exclusive-ORing a (see 3) with the basic character font, we obtain a font with diagonal lines that are distorted when enlarged, as shown in a' [ ] in Figure 4C (b). (See FIG. 1, 0.) Since zero-character errors always occur between the dots in the diagonally shaded area, the algorithm described above can extract them either diagonally to the right or diagonally to the left. In Figure 4C (b), in addition to the font in the diagonal line, there are also dots at the ends of the straight line, but since there are no continuous dots around them (if there were dots around them, they would be diagonal lines, so the above algorithm (reflected in the results), and are eliminated by the interpolation algorithm shown below.

That is, the font obtained in the above manner is enlarged twice as shown in FIG. 4D, A() (example of n=2 in FIG. 1), and these are shown at the top, bottom, and right, respectively.

By performing a logical product with the result shifted one dot at a time to the left, the dot A' [ ] to be interpolated can be obtained as shown in FIG. 4E (see FIG. 10). If we take the logical sum of this and B() which is twice the basic character font, we get the 4th F.
As shown in the figure, an enlarged character B' [ ] can be obtained by interpolating the distorted portion (see Fig. 1 @, ■). By outputting this to the display controller 4 (see FIG. 10), the CPU 3 can perform the display shown in FIG. 4F on the display device 6. It goes without saying that the above operations are not limited to one character at a time, but can be performed on multiple characters at the same time.

As explained above, since this is a simple method that uses a basic character font and combines shift 9 logical sum and logical product, it is more effective than the conventional method of determining whether or not to interpolate one dot at a time. It is possible to quickly obtain enlarged characters by interpolating the .

In addition, above we have explained an example of doubling the size, but
A similar result can be obtained even if it is expanded N times. In this case, when the enlarged shaded area is shifted, it is shifted by N-1 dots instead of by 1 dot as explained above.

For example, in the case of 3 times the number, the algorithm for extracting the diagonal part of the basic character is the same as in the case of 2 times the number, so the dot pattern shown in FIG. 4C (b) can be obtained as a result. FIG. 5A shows this dot pattern multiplied by N (3 times).

In this figure, in the case of 2x enlargement, there was a shift of 1 dot, but at the knee, it is N-1 dots, so if we shift 3-1 = 2 dots up, down, left and right, and take the logical product, we will see the 5th B.
The result is as shown in the figure, and a dot pattern for interpolation as shown in the figure can be obtained.

If this is logically ORed with the basic character multiplied by three, the enlarged character shown in FIG. 5C, which has been interpolated three times, can be obtained.

In this way, by setting the number of dot shifts to (enlargement magnification -1) when enlarging and interpolating the dot pattern in the shaded area, any enlargement can be handled by the same algorithm.

〔Effect of the invention〕

According to this invention, it is possible to obtain an enlarged character interpolated by logical operations such as shift, logical product, and logical sum, regardless of the dot pattern of the character, so it is possible to enlarge multiple characters at once. The processing time can be significantly reduced compared to the conventional enlargement method for each character. Furthermore, if the number of fonts for characters is the same, it becomes possible to obtain enlarged characters in a constant processing time, regardless of the complexity of the characters.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing an embodiment of the invention, and FIG.
The figure is a hardware configuration diagram for carrying out this invention, Figure 3 is an explanatory diagram for explaining the basic character font and enlarged character font, and Figures 4A to 4F specifically explain the enlargement processing process. Explanatory diagrams for, Figures 5A to 5
FIG. C is an explanatory diagram for explaining the 3x enlargement process, and FIG. 6 is an explanatory diagram for explaining the conventional method. Code explanation 1...Character generator, 2...-ROM/R
AM, 3... Processing unit (CPU), 4... Display controller, 5-V RAM, 6 = Display device L12'
vA Ken 1 Zutomi 4A! Il Figure 4B v 5 person figure 115 BI11 (α) Eight years middle 1 Figure 4D Figure 4F Figure 5C

Claims (1)

[Claims] 1) In a character enlargement method for obtaining an enlarged character font several times larger than the basic character font, the basic character font and each dot thereof are shifted by one dot each upward, downward, left, and right. Among the outputs obtained by performing a logical AND operation between , performs an exclusive OR operation between the result and the basic character font, extracts dot information located on the diagonal line, and interpolates and enlarges the misshapen part based on the extracted information. How to enlarge text. 2) The character enlarging method according to claim 1, wherein a plurality of characters are enlarged at the same time.