JPS5556762A - Picture element signal conversion method for digital reproducer - Google Patents
Picture element signal conversion method for digital reproducerInfo
- Publication number
- JPS5556762A JPS5556762A JP13026178A JP13026178A JPS5556762A JP S5556762 A JPS5556762 A JP S5556762A JP 13026178 A JP13026178 A JP 13026178A JP 13026178 A JP13026178 A JP 13026178A JP S5556762 A JPS5556762 A JP S5556762A
- Authority
- JP
- Japan
- Prior art keywords
- picture element
- density
- max
- scanning
- value
- 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
Landscapes
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE: To increase the contrast between the texture part and the scanning part by carrying out the density conversion to the picture element density signals obtained through the 1-line scanning in accordance with the highest density value among the picture element density signals in case the conversion is given to the picture element signals of the digital reproducer, thus obtaining a high-contrast picture.
CONSTITUTION: Picture element density signal X obtained through the scanning is supplied to highest density detector 2 from sensor 1 to detect highest density value Xmax, and furthermore memorized in temporary memory 3 with reception of the address indication from address indicator 4. Density value X is defined as Xmax when larger than the detected value Xmax; while X is made constant when smaller than Xmax. The same operation is given also to the density value obtained through the next scanning for memorization. When the process equivalent to one line is over, signal X memorized in memory 3 is drawn out. And conversion density value X' is obtained through the operation by picture element signal converter 5 and then compared with set value XD through comparator 6. Then the white or black dot is delivered according to the result of the comparison. The output signal thus processed is supplied to output device 8 via output buffer 7, thus high-contrast pictures are obtained in sequence.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13026178A JPS5556762A (en) | 1978-10-23 | 1978-10-23 | Picture element signal conversion method for digital reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13026178A JPS5556762A (en) | 1978-10-23 | 1978-10-23 | Picture element signal conversion method for digital reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5556762A true JPS5556762A (en) | 1980-04-25 |
Family
ID=15030028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13026178A Pending JPS5556762A (en) | 1978-10-23 | 1978-10-23 | Picture element signal conversion method for digital reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5556762A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5713858A (en) * | 1980-06-28 | 1982-01-23 | Nec Corp | Adaptive quantization device |
-
1978
- 1978-10-23 JP JP13026178A patent/JPS5556762A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5713858A (en) * | 1980-06-28 | 1982-01-23 | Nec Corp | Adaptive quantization device |
JPH0117311B2 (en) * | 1980-06-28 | 1989-03-29 | Nippon Electric Co |
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