JPS6482763A - Digital image coding system - Google Patents
Digital image coding systemInfo
- Publication number
- JPS6482763A JPS6482763A JP24012787A JP24012787A JPS6482763A JP S6482763 A JPS6482763 A JP S6482763A JP 24012787 A JP24012787 A JP 24012787A JP 24012787 A JP24012787 A JP 24012787A JP S6482763 A JPS6482763 A JP S6482763A
- Authority
- JP
- Japan
- Prior art keywords
- digital image
- picture elements
- limiting
- feature quantities
- representative values
- 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.)
- Granted
Links
Landscapes
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
PURPOSE:To realize image reproduction of high quality with a simple constitution limiting picture elements according to features of a block obtained by binary encoding and then limiting the picture elements. CONSTITUTION:An image to be encoded is divided into specific blocks consisting of mXn picture elements and feature quantities indicating representative values and contrast in the respective blocks are found. Then the digital images of the respective blocks are quantized under quantization conditions determined by deciding whether the feature quantities are large or small under decision conditions corresponding to the representative values. Consequently, digital image encoding which encodes the gradational digital image efficiently without deteriorating the picture quality is performed with the simple constitution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24012787A JP2561294B2 (en) | 1987-09-24 | 1987-09-24 | Image coding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24012787A JP2561294B2 (en) | 1987-09-24 | 1987-09-24 | Image coding device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6482763A true JPS6482763A (en) | 1989-03-28 |
JP2561294B2 JP2561294B2 (en) | 1996-12-04 |
Family
ID=17054899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24012787A Expired - Fee Related JP2561294B2 (en) | 1987-09-24 | 1987-09-24 | Image coding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2561294B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62140552A (en) * | 1985-12-13 | 1987-06-24 | Canon Inc | Encoding method for image |
-
1987
- 1987-09-24 JP JP24012787A patent/JP2561294B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62140552A (en) * | 1985-12-13 | 1987-06-24 | Canon Inc | Encoding method for image |
Also Published As
Publication number | Publication date |
---|---|
JP2561294B2 (en) | 1996-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |