JPS5588469A - Coding method for picture signal including intermediate gradation level - Google Patents
Coding method for picture signal including intermediate gradation levelInfo
- Publication number
- JPS5588469A JPS5588469A JP16380678A JP16380678A JPS5588469A JP S5588469 A JPS5588469 A JP S5588469A JP 16380678 A JP16380678 A JP 16380678A JP 16380678 A JP16380678 A JP 16380678A JP S5588469 A JPS5588469 A JP S5588469A
- Authority
- JP
- Japan
- Prior art keywords
- case
- coding
- decided
- rll
- changing point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To secure the high-efficiency coding for the gradation picture by giving the run-length coding to the white part for the first line and then deciding the coordinates for the changing point picture element in the subsequent lines based on the changing point of the preceding line for combination with the gradation code to give the coding.
CONSTITUTION: Distance RLl1 of the first changing point picture element on process line L2 is counted, and then RLl1' is decided to first changing point Q1 on preceding line L1. Using the smaller one of those two distance RLl1 and RLl1' as the reference picture element, l1 is decided to carry out the coding through the prescribed code table. In case l1' is selected, the coding is given in the constitution of the RL code featuring a', kind b' of the relative address, density code c' and l1' each. In this case, the kind of the relative address of a' is decided by 10, 11 and 1 in case Q1 is preceding to R1, is next to R1 and they are identical to each other respectively. For the selection between l1 and l1', it starts at the white in case 0 comes first, the selection of l1 is decided in case 0 comes subsequently, the l1' is decided in the case of 1 and 1 respectively. In such way, and high-efficiency coding is ensured for the picture including the gradation.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16380678A JPS5588469A (en) | 1978-12-26 | 1978-12-26 | Coding method for picture signal including intermediate gradation level |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16380678A JPS5588469A (en) | 1978-12-26 | 1978-12-26 | Coding method for picture signal including intermediate gradation level |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5588469A true JPS5588469A (en) | 1980-07-04 |
Family
ID=15781051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16380678A Pending JPS5588469A (en) | 1978-12-26 | 1978-12-26 | Coding method for picture signal including intermediate gradation level |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5588469A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5761380A (en) * | 1980-09-30 | 1982-04-13 | Ricoh Co Ltd | Picture encoding system |
-
1978
- 1978-12-26 JP JP16380678A patent/JPS5588469A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5761380A (en) * | 1980-09-30 | 1982-04-13 | Ricoh Co Ltd | Picture encoding system |
JPH0213511B2 (en) * | 1980-09-30 | 1990-04-04 | Ricoh Kk |
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