JPS60198966A - Code data processing system - Google Patents

Abstract

PURPOSE:To always complete the processing at an opposite color to a started color by allowing a color identification section to check the final color of a line at each end of coding of one line, giving it to a run length addition section when the final color is white and allowing the run length addition section to apply the black zero processing. CONSTITUTION:When the coding of one line is finished, a line control section 21 informs the end of one line to the color identification section 23. The color identification section 23 receiving this information checks the final color of the line and when the final color is black, no processing is conducted further and the processing takes over a line end code EOL addition section 25. When the final color is white, it is informed to a run length addition section 24. Then the addition section 24 transmits a run length code corresponding to black zero as a coded signal.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to run-length encoding processing, and in particular, when an image signal is run-length encoded, when the final color of the image signal is the same color as the leading color. relates to an encoded data processing method in which a run length code of the opposite color is added and the image signal is encoded so that it always ends with a color opposite to the leading color.

(2) Prior Art and Problems Conventionally, run-length encoding methods include the MH method, which is a -dimensional encoding method.

The MH encoding method replaces the length of each color (white run length, black run length) of a black and white binary image signal with a fixed code as shown in Figure 1. , all data lines start with a white run sign. Also, after one line of data, a line termination code (E
OL) is added.

If you try to synthesize such MH encoded image signals, if the final color of the previous encoded signal is white, it will be the same color as the first color of the following encoded signal, and it will be simply synthesized. There is also a drawback that it cannot be done.

(3) Purpose of the Invention In view of the above drawbacks, the present invention adds a black 0 when the end of an image signal is a white run during run-length encoding, in order to easily synthesize encoded data. The object of the present invention is to provide an encoded data processing method that encodes the image signal so that it ends in a color opposite to the leading color.

(4) Structure of the Invention The object is to provide a system that includes an original image reading means for reading an original image signal into a line control section, and 5 an encoder for encoding the read original image signal and adding an end signal. Each time the coloring is completed, the line control unit notifies the color identification means of the end of the line, and the color identification means scans the final color of the line eight times, and if the final color is white, it indicates that the run length. This is achieved by a code data processing method characterized in that the addition means is notified, and the run leg 1111 addition means performs black 0 processing.

(5) Examples of the invention Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an M) (code table. In the figure, 11 is a white run length, 212 is a code word for a white run, and 13 is a code word for a white run.
is the black run length, and 14 is the black run length. In the figure, 20 is an image reading section, 21 is a line control section, 22 is a run-length encoder, 23 is a color identification section, 24 is a run-length addition section, and 25 is an EOL addition section.

When the original image signal of FIG. 3-1 read by the image reading section 20 is sent to the line control section 21, the line control section 21
sequentially sends the original image signal A to the encoder 22. The encoder 22 detects the color and length of the sent original image signal A, and converts each color and length to white 50. Black 3. White 40. black 2
0. The conventional encoded signal A shown in FIGS. 3 and 3 simply adds an EOL code (final signal) to the run-length code word (see FIG. 1) corresponding to white (500).

Notify 3. The color identification unit 23 that has received the notification checks the final color of the line, and if the final color is black, does nothing and transfers the process to the EOL addition unit 25.

If the final color is white, indicate that in the run length appendix 2.
Notify 4. The run-length addition section 24 sends out a run-length code word corresponding to black 0 as a coded signal (black 0 processing). The end of the image signal in Figure 3-1 is white 50
Since it is 0, a black 0 is added. After the encoding of one line is completed in this way, the EOL tilt adding section 25 sends out a code indicating EOL.

Through the above processing, the original image signal A shown in FIG. 3-1 is converted into the encoded signal C shown in FIG. 3-5.

When the original image signal B in FIG. 3-2, in which the final color of the line is black, is sent to the line control section 21, the third
The encoded signal B in FIG. 4 is exactly the same as the encoded signal B in FIGS. 3-6 according to the present invention.

In this way, it is possible to easily obtain an encoded signal that always starts with a white run at the beginning of the line and ends with a dark run at the end of the line.

(6) As described in detail of the invention, by using data encoded according to the present invention, a plurality of run-length encoded data can be easily synthesized.

The encoded signals shown in FIGS. 3-5 and 3-6 are image signals encoded by the embodiment shown in FIG. Since the final color of the encoded signal in FIG. 3-1 is white, black O is added.

When combining these two encoded signals, the final color of the encoded signal is the opposite color to the first color, so simply removing the encoded signal EOL code in Figure 3-5 will result in a
The composite encoded signal shown in FIG. 7 can be obtained.

In this way, when using the run-length encoder in advance, if the end of one line is a white run, by inserting a black 0, multiple run-length encoded data can be combined by a simple process of removing the EOL code. becomes possible.

Furthermore, since the present invention complies with the run-length encoding method recommended by the CCITT, its range of use is extremely wide.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an MH code table. FIG. 2 is a system configuration diagram showing an embodiment of the present invention. FIG. 3-1 is a diagram showing the original image p, A. FIG. 3-2 is a diagram showing the original image signal B. FIG. 3-3 is a diagram showing an encoded signal A according to a conventional method. FIGS. 3-4 are diagrams showing the encoded signal B according to the conventional method. 3-5 are diagrams showing encoded signals C according to the present invention. 3-6 are diagrams showing encoded signals according to the present invention. Figure 3-7 shows a coded signal E which is a combination of coded signals C and D.
FIG. Explanation of symbols: 20 is an image reading unit, 21 is a line control unit,
22 is a run-length encoder, 23 is a color identification section, 24 is a run-length addition section, and 25 is an EOL addition section. Drawing cleaning δ (no change in content) Kaya PnJ Megumi 2 Figure 3-1 Figure $3-2 Figure 3-3 Figure country ze ■ = Wood = Ro = Ko Figure 3-4 Section Goash i Picture Shoulder I Mouth "Mouth 3-5 White 50 Black 3 White 4o, Breast 20 molar 5ωro EOL'
Figure 3-6 ■Ro book - Small side side ■CoFigure 3-7 White 50'l A3114o Kaoru 2o White 50 ri fo dai aν Kuro 5 dai i White fIoL6L procedural amendment form (method) % formula % ( 7 Relationship with the case of the person making the 3rd amendment Patent applicant f, 1: Location Seri 3!> 1st Nakahara IX Kami Elementary School, Yosaki City, Yoken]
【Naka】O】5 (522) Name Fujitsu Limited

Claims (1)

[Claims] original image reading means for reading the original image signal into the line control section;
In a system equipped with an encoder that encodes the read original image signal and adds an end signal, the line control unit controls the end of the line every time encoding of one line is completed. The color identification means checks the final color of the line, and if the final color is white, it notifies the run length 1 increase means, and the run length addition means performs black O processing. A coded data processing method characterized by: