JPS6186787A - Order conversion system for character pattern - 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 is a method for converting the order of a character pattern given by a dot matrix to obtain a multifold enlarged (reduced) pattern in the vertical and horizontal directions. 〇〇〈Prior art〉 Generally, in a device that outputs characters, character data is stored in a ROM character generator (font memory) in the form of dots, and character dots are output when displaying characters. The data is read from a character generator, written into a refresh memory corresponding to a pixel point on a CR7 display screen by hardware, and displayed using a raster scan method.

Conventionally, in this type of character output device (including printing devices), characters are enlarged based on the output (original pattern) of a character generator in order to make the output characters easier to see.
Alternatively, it has a function to reduce and display (print). To obtain an enlarged pattern of characters, first apply for the patent application 1986-2802.
As proposed in No. 8, for example, it is possible to have one standard dot pattern, use the standard dot pattern as the original dot pattern, and enlarge it appropriately to obtain an enlarged pattern of a desired size. .

However, since such degree conversion merely performs expansion (reduction) conversion, the character pattern after conversion is noticeably unnatural. Therefore, it is necessary to remove these unnaturalness by correcting the enlarged (reduced) image.

For example, if the original pattern (R) shown in Figure 4 is enlarged twice in height and width, the enlarged pattern will be discontinuous between ■ and O in the original pattern, as shown in Figure 5. Conventionally, these discontinuous portions are corrected after order conversion.

However, there is a problem in that it is very difficult to correct such discontinuous portions, and the process requires a long time.

<Object of the invention> The present invention has been made in view of such conventional problems.
The purpose is to provide a method for converting the order of character patterns, which makes it possible to omit complicated corrections after conversion by making predetermined corrections to the original pattern and then converting the order. It is.

<Embodiment> FIG. 1 is a schematic diagram of the main parts of a character display device employing the character pattern order conversion method according to the present invention.

In the figure, 1 is a character generator (ROM) that stores the original pattern of characters in the form of dots, and 2 is a storage device that temporarily stores the original pattern of characters read from character generator 1 and stores the modified original pattern. (RAM); 3 is a correction device that detects diagonally connected dots on the original pattern and corrects the original pattern by adding dots at predetermined positions; 4 is a correction device that corrects the original pattern by performing the order conversion as described above; 5 is a storage device that stores the enlarged pattern.

The enlargement of the dots is performed by calculating the values (0 or 1, which means 1 is lit (black) and 0 is off (white)) of the upper, lower, left, and right doors adjacent to a certain dot A (black) on the original dot putter 7. U.D.L.R.
For example, when dot A is enlarged 2x2 times, the upper left is L+U and the lower left is L+D for the four dots in the enlarged pattern.

The upper right is R+U, and the lower right is R+R.

According to this development, dots (black) are created on the original pattern.
Even if exists, if the top, bottom, left, and right sides are O (white dots), after expansion, the black dot will be the same as if it did not exist. Therefore, if the original pattern shown in FIG. is temporarily stored in a RAM (read/write memory) 2, and the correction device 3 detects the diagonally connected dot part ■@ on the original pattern, and places another dot under the dot ■ as shown in Fig. θ
is added to modify the original pattern, and the modified pattern is stored in the RAM 2. Then, the modified pattern is sent to the enlargement and expansion device 4, and the pattern is enlarged by the method described above. In this case, since the original pattern has already been corrected by θ in Figure 2, the enlarged pattern is expanded and stored with the previous discontinuous part corrected by door) as shown in Figure 3. It is stored in the device 5.

In this way, before enlarging and developing, the predetermined part of the original pattern, that is, the part of the dots that will be discontinuous when enlarging and developing, is corrected by adding dots in advance, so the correct enlarged pattern can be immediately created by enlarging and developing. You can get it.

In addition, in the original pattern, the diagonal series of dots can be in addition to the above-mentioned downward-rightward dots, downward-leftward dots, or a combination of these, but how do you add and correct dots to these? This may be determined in advance based on the relationship when expanded.

Further, the above embodiment is an example of enlarging the original pattern, but conversely, when obtaining a reduced pattern, it is sufficient to delete any redundant dots in advance before reducing the original pattern. .

Furthermore, instead of modifying the original pattern and then developing it as in the embodiment, a method may be used in which necessary portions are modified and the pattern is developed in five parts.

<Effects of the Invention> As explained in detail above, the character pattern order conversion method according to the present invention applies a predetermined modification to the original pattern in advance, and then performs order conversion to obtain an enlarged (reduced) pattern. , it is possible to immediately obtain the correct character pattern of the desired size without making any complicated corrections after conversion. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the main parts of a character display device that employs the character pattern order conversion method according to the present invention, FIG. 2 is a diagram showing the original pattern after modification, and FIG. 3 is a diagram showing the original pattern after enlargement. A diagram showing the character pattern, Figure 4 is a diagram showing the original pattern,
FIG. 5 is a diagram showing a character pattern obtained by enlarging the original pattern as it is. 1 is a character generator, 2 is a RAM. 3 is a correction device, 4 is an expansion device, and 5 is a storage device.Patent attorney Yoshihiko Fukushi (and 2 others)Figure 1Figure 2Figure 3Figure 4Figure 5

Claims (1)

[Claims] 1. In the character pattern order conversion method, which converts the order of the original character pattern given by Dotxtrix to obtain a multifold enlargement (reduction) pattern in the vertical and horizontal directions, a predetermined modification is made to the original pattern in advance. A method for converting the order of a character pattern, characterized in that the order is then converted to obtain an enlarged (reduced) pattern.