JPS55142344A - Color correcting device in digital color tone control - Google Patents
Color correcting device in digital color tone controlInfo
- Publication number
- JPS55142344A JPS55142344A JP4907979A JP4907979A JPS55142344A JP S55142344 A JPS55142344 A JP S55142344A JP 4907979 A JP4907979 A JP 4907979A JP 4907979 A JP4907979 A JP 4907979A JP S55142344 A JPS55142344 A JP S55142344A
- Authority
- JP
- Japan
- Prior art keywords
- data
- color
- discriminating
- gwl
- gates
- 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
- Facsimile Image Signal Circuits (AREA)
- Color Image Communication Systems (AREA)
Abstract
PURPOSE: To realise easy and accurate color correction, by indexing the memory table on the basis of the color discrimination data to divide the hue region by mutual comparison and necessary computation of color data, and reading out correction data.
CONSTITUTION: Yellow, magenta and cyan color data Y2, M2, C2 of 8-bit or other plate making color digital signals by scanning of the original are compared in a coincidence detecting comparator parallel to the first color discriminating circuit 44, and magnitude comparators 52Y and 51Y, 52M and 51M, and 52C and 51C to generate rough color discriminating data gWl to divide the hue regions in six stages or so through OR gates 53YW53C, inverters 54YW54C, and AND gates 55W60. Upper digit 4-bit data Y2'... of data Y2... added to the second operating circuit 45 are processed in adding circuit 62 and others, thereby generating color discriminating data D. According to these data gWl and data D, when the memory is indexed, the color correcting data may be easily and accurately read out by digital processing without using switch elements or the like, so that the color may be corrected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4907979A JPS55142344A (en) | 1979-04-23 | 1979-04-23 | Color correcting device in digital color tone control |
IL59886A IL59886A (en) | 1979-04-23 | 1980-04-20 | Digital color control method and machine |
GB8013060A GB2050106B (en) | 1979-04-23 | 1980-04-21 | Digital colour control for colour picture reproduction |
DE19803015396 DE3015396A1 (en) | 1979-04-23 | 1980-04-22 | METHOD AND DEVICE FOR DIGITAL CONTROL OF AN IMAGE COLOR |
US06/142,650 US4335398A (en) | 1979-04-23 | 1980-04-22 | Digital color control method and machine |
FR8009157A FR2455307A1 (en) | 1979-04-23 | 1980-04-23 | METHOD AND APPARATUS FOR NUMERICALLY CONTROLLING COLORS IN AN IMAGE REPRODUCING MACHINE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4907979A JPS55142344A (en) | 1979-04-23 | 1979-04-23 | Color correcting device in digital color tone control |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55142344A true JPS55142344A (en) | 1980-11-06 |
JPH0151827B2 JPH0151827B2 (en) | 1989-11-06 |
Family
ID=12821076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4907979A Granted JPS55142344A (en) | 1979-04-23 | 1979-04-23 | Color correcting device in digital color tone control |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55142344A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62263768A (en) * | 1986-05-09 | 1987-11-16 | Ricoh Co Ltd | Chrominance signal converter |
-
1979
- 1979-04-23 JP JP4907979A patent/JPS55142344A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62263768A (en) * | 1986-05-09 | 1987-11-16 | Ricoh Co Ltd | Chrominance signal converter |
Also Published As
Publication number | Publication date |
---|---|
JPH0151827B2 (en) | 1989-11-06 |
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