JPS6480991A - Color data compression - Google Patents
Color data compressionInfo
- Publication number
- JPS6480991A JPS6480991A JP62239459A JP23945987A JPS6480991A JP S6480991 A JPS6480991 A JP S6480991A JP 62239459 A JP62239459 A JP 62239459A JP 23945987 A JP23945987 A JP 23945987A JP S6480991 A JPS6480991 A JP S6480991A
- Authority
- JP
- Japan
- Prior art keywords
- color
- data
- color data
- edge part
- representative
- 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 prevent the generation of color leakage or deterioration on the edge part of an image or the head position of a line by finding out plural representative color data preferentially in accordance with the frequency of appearance and executing adaptive mapping processing for providing current color data based upon these representative color data. CONSTITUTION: Each inputted digital primary color data consisting of 8 bits in each color (24 bits per pixel) are compressed to compression data dd consisting of 8 bits per pixel and the data dd are supplied to a color display circuit 31, which restores the data dd to three-primary color data consisting of 8 bits in each color. In the case of compressing color data, a color space is devided into plural areas and representative color data in respective areas are used for processing. In this case, an edge part of which color image signal change is larger than a prescribed threshold is previously found out, the appearance frequency of a pixel corresponding to the edge part in each divided area of the color space is found out and representative color mapping processing is executed by preferentially using color data having higher frequency. Consequently color expression can be finely executed even on the edge part of an image or the line head position of a screen and comprehensive picture quality can sharply be improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62239459A JP2605736B2 (en) | 1987-09-24 | 1987-09-24 | Color data compression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62239459A JP2605736B2 (en) | 1987-09-24 | 1987-09-24 | Color data compression method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6480991A true JPS6480991A (en) | 1989-03-27 |
| JP2605736B2 JP2605736B2 (en) | 1997-04-30 |
Family
ID=17045075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62239459A Expired - Lifetime JP2605736B2 (en) | 1987-09-24 | 1987-09-24 | Color data compression method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605736B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114708247A (en) * | 2022-04-22 | 2022-07-05 | 领先光学技术(常熟)有限公司 | Cigarette case packaging defect identification method and device based on deep learning |
-
1987
- 1987-09-24 JP JP62239459A patent/JP2605736B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114708247A (en) * | 2022-04-22 | 2022-07-05 | 领先光学技术(常熟)有限公司 | Cigarette case packaging defect identification method and device based on deep learning |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2605736B2 (en) | 1997-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080213 Year of fee payment: 11 |