JPS6480992A - Color data compression - Google Patents
Color data compressionInfo
- Publication number
- JPS6480992A JPS6480992A JP62239460A JP23946087A JPS6480992A JP S6480992 A JPS6480992 A JP S6480992A JP 62239460 A JP62239460 A JP 62239460A JP 23946087 A JP23946087 A JP 23946087A JP S6480992 A JPS6480992 A JP S6480992A
- Authority
- JP
- Japan
- Prior art keywords
- color
- color data
- data
- appearance
- mapping processing
- 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
- Image Processing (AREA)
- Color Image Communication Systems (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
PURPOSE: To improve color expression also in a large difference part of color data and to sharply improve comprehensive picture quality by selecting plural representative color data preferentially in accordance with the higher frequency of appearance and executing adaptive mapping processing by using these representative color data. CONSTITUTION: Color display data dd are restored to 24 bits in each original pixel, i.e., three primary color data R', G', B' consisting of 8 bits in each color, respective color data R', G', B' are sent to respective D/A converters 32R, 32G, 32B and converted into analog three primary color signals. In the case of executing adaptive mapping processing for color data compression, pixels of which inter-adjacent pixel differences are larger than a prescribed threshold are previously found out, the appearance frequency of colors corresponding to these pixels in respective divided areas of color space is found out and color data are used for representative color mapping processing preferentially in accordance with the higher frequency of appearance. Consequently color expression can be improved even in a large difference part of color data and comprehensive picture quality can be improved.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239460A JP2621224B2 (en) | 1987-09-24 | 1987-09-24 | Color data compression method |
DE88304544T DE3886817T2 (en) | 1987-05-21 | 1988-05-19 | Color image signal processing method and apparatus. |
US07/195,774 US5142272A (en) | 1987-05-21 | 1988-05-19 | Method and apparatus for processing display color signal |
AT88304544T ATE99821T1 (en) | 1987-05-21 | 1988-05-19 | METHOD AND DEVICE FOR COLOR IMAGE SIGNAL PROCESSING. |
EP88304544A EP0292284B1 (en) | 1987-05-21 | 1988-05-19 | Method and apparatus for processing display colour signal |
AU16479/88A AU607218B2 (en) | 1987-05-21 | 1988-05-20 | Method and apparatus for processing display color signal |
CA000567346A CA1333421C (en) | 1987-05-21 | 1988-05-20 | Method and apparatus for processing display color signal |
KR1019880006009A KR970002145B1 (en) | 1987-05-21 | 1988-05-21 | Method and apparatus for processing display color signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239460A JP2621224B2 (en) | 1987-09-24 | 1987-09-24 | Color data compression method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6480992A true JPS6480992A (en) | 1989-03-27 |
JP2621224B2 JP2621224B2 (en) | 1997-06-18 |
Family
ID=17045091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62239460A Expired - Lifetime JP2621224B2 (en) | 1987-05-21 | 1987-09-24 | Color data compression method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2621224B2 (en) |
-
1987
- 1987-09-24 JP JP62239460A patent/JP2621224B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2621224B2 (en) | 1997-06-18 |
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Legal Events
Date | Code | Title | Description |
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EXPY | Cancellation because of completion of term | ||
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