JPS62203196A - Display conversion system for dot composition character - 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 relates to a communication system for transmitting character and graphic information, and particularly to a method for converting character and graphic information between systems that express characters and figures in different ways. It is something.

(Prior art and its problems) In recent years, many text and graphic information transmission systems called videotex have been put into practical use. However, when attempting to transmit information between these systems, the received information may not be displayed because each system employs an individual information display means.

The Captain System and the Pre-Still System will be described below as examples of VideoTex having different display methods.

Compared to Pre-Still, the Captain System can accommodate fewer characters on one screen, so when converting the Pre-Still screen, the amount of characters is increased by redisplaying the characters smaller using order conversion.

At that time, since the coloring units are different between the captain system and the pre-still system, the color classification may also be disrupted. In other words, with the Captain System, only two colors are colored at most per 4 x 4 dot unit, and if you try to faithfully reproduce the color changes of the original pre-still picture made up of 6 x 8 dots with Captain, the 4 x 4 dots It becomes necessary to display three or more colors in a coloring unit, and in that case, a coloring conversion error occurs.

Therefore, conventionally, as a means to reduce the coloring conversion error, (1) the original pre-still image is divided into colored units of 4×4 dots of the captain.

2) Next, within the 4×4 dot coloring unit, CI, C2, C3, etc. are determined in descending order of color area.

3) Next, give priority to the two colors with the largest area, and replace the third color C3 and subsequent colors with C1 or C2.

I was making it do something like this.

Even with such a simple method, ■The shape of the pre-still is originally a rough shape, and ■As for the character part, the control code for changing the character color is also counted as one character, so there is no difference between one character and the next. The average image quality after conversion was mostly satisfied because the color never changed and there was always a space with the same color as the background color of the previous character.

However, in relation to item (■) above, the deterioration in image quality is difficult to notice especially when changing the background color of the text area to a color other than black, but the Breath Still System only eliminates the space area when changing to a black background. The background changes immediately after the text. This is because there are generally many screens with a black background color, and the purpose of this is to eliminate wasted space every time the background color is changed to black, and to maximize the number of characters on one screen as much as possible.

Therefore, in such a case, with the conventional method, the characters will be distorted in the character part where the background color changes to black.
Although the average image quality of the entire screen was good, there was a drawback in that the readability of text information on the screen was reduced.

This drawback will be further explained using drawings. FIG. 1 shows a processing method according to operations 1), 2), and 3) described above. The pre-still system uses 6x10 dots as the screen expression unit and coloring unit. Therefore, first, order conversion to 6×8 dots is performed. Now, as shown in figure (al), for example, suppose that the character A is sent with the background color blue and the font color red, and then a code to change the background color to black is sent. In this case, , without leaving a space for one character as described above, the background color becomes black from the place where the code should be located.This screen is divided into colored units of 4×4 dots as shown in Figure fbl. Furthermore, for colored units that have three or more colors, as shown in Figure (e), CI, C2, and C3 are determined in order of color area.
Prioritize color CL C2 and replace C3 with C1 or C2. Figure ((fl is C3 replaced with 02, and information is missing at this coloring fip level. Figure (el) is C3 replaced with Cl; in this case, the letter A It smears.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems. When displaying text information, if the received text/figure is included in an adjacent coloring unit, coloring conversion is performed to maintain the text color with top priority within the device-specific coloring unit to improve the converted image quality. This provides a display conversion method for dot-constituent characters.

(Structure and operation of the invention) The present invention will be explained in detail below.

The present invention is based on FIG. 1 (C
In l, if the font color is not CI, regardless of the color area, the font color is set as CI, the background color is set as 02, C3 is set as another color, and C3 is set as 0.
This process performs the process of replacing 2.

The processing steps of the present invention are organized as follows.

Step l) The pre-still screen that has been decoded and subjected to character order conversion processing is decomposed into colored units of 4×4 dots of the captain.

Step 2) Next, within the 4×4 dot coloring unit, CI, C2, C3, . . . - are determined in descending order of color area.

Step 3) If the font color is not 01, force 01 to be the font color, and at the same time 02 to be the background color of that font.

Step 4) Replace C3 with 02.

FIG. 2 shows a screen processed by this processing step.

(Example) FIG. 3 shows an example of a device configuration to which the present invention is applied.

The operation of this embodiment will be explained according to the flowchart shown in FIG.

In the human power section 1, °ζ, input the code indicating the characters, figures, etc. used in the pre-still system (10) L, decoded by the decoding section 2 for the pre-still system (20) L, if the code indicates the end of one screen ( 11), switch switch 2a,
The captain system code output unit 7 outputs a screen end code (70) and ends the process (71). If it is not a screen end code, the input character/figure code is decoded by the pre-still system decoding unit 2, and the output is stored in the character/figure degree conversion dictionary unit 4 in the character/figure degree conversion unit 3. It is expressed (30) using characters and graphical representation elements with a 6×8 dot configuration.

Next, the block dividing unit 5 divides the characters and figures composed of 6 x 8 dots into blocks of 4 x 4 dots (5
0) Do. The coloring approximation processing unit 6 determines whether or not there is a character part in the block. If there is a character part, the coloring approximation process (61) of the display color giving priority to the character color, which is the gist of the present invention, ), otherwise coloring approximation processing is performed using the conventional method (62) that gives priority to the size of the color area, and the code is outputted by the code output unit 7 for the captain system (7
0) L, If the screen does not end, repeat code input (10).

(Effects of the Invention) Through the above operations, according to the present invention, it becomes possible to display a screen for the pre-still system on a terminal for the captain system, and the image quality in this case is also superior to that of the conventional method. become something.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a case where several red characters continue on a background of a color other than black, such as blue, and the background color immediately changes to black, and FIG. 2 is a process according to the present invention in coloring approximation. FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a flow diagram showing the flow of processing in the present invention. ■...Input unit, 2...Decoding unit for pre-still system, 3...Character/figure order conversion unit, 4...Character/figure order conversion dictionary unit, 5...Block division unit, 6...
...Coloring approximation processing section, 7... Code output section for captain system.

Claims (1)

[Claims] When displaying character information created with a different type of dot composition character with a different degree on a character figure display terminal that uses a specific dot composition character, if the received character figure is included in an adjacent coloring unit. is a display conversion method for dot-constituent characters, which is characterized by performing coloring conversion so as to maintain the character color with the highest priority within a terminal-specific coloring unit, thereby improving the converted image quality.