JPS54128214A - Sampling quantizing device for picture - Google Patents
Sampling quantizing device for pictureInfo
- Publication number
- JPS54128214A JPS54128214A JP3630078A JP3630078A JPS54128214A JP S54128214 A JPS54128214 A JP S54128214A JP 3630078 A JP3630078 A JP 3630078A JP 3630078 A JP3630078 A JP 3630078A JP S54128214 A JPS54128214 A JP S54128214A
- Authority
- JP
- Japan
- Prior art keywords
- level
- picture
- circuit
- sampling
- signal
- 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
- Facsimile Image Signal Circuits (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE: To obtain a sampling picture which features a small quantization level number and also give the most preferable impression in accordance with the estimation of the human eyes by examining and utilizing the density level which is most important to the human eyes among the subject pictures.
CONSTITUTION: The picture information is read by the image sensor and then supplied to quantization circuit 1 in the form of electric picture signal 6. Signal 6 is quantized into n-units of quantization level via circuit 1 and then supplied to level counters 21∼2n , thus the emerging frequency of the picture element being counted with every quantization level of n-units. Then the maximum and minimum value are detected via maximum/minimum level detector circuit 3 among the count value of counters 21∼2n. Both the maximum and minimum levels thus obtained plus condition setting signal 7 are processed through level control circuit 4, and sampling circuit 5 is actuated to quantize the desired level value and thus to obtain sampling signal 8.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3630078A JPS54128214A (en) | 1978-03-29 | 1978-03-29 | Sampling quantizing device for picture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3630078A JPS54128214A (en) | 1978-03-29 | 1978-03-29 | Sampling quantizing device for picture |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54128214A true JPS54128214A (en) | 1979-10-04 |
Family
ID=12465955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3630078A Pending JPS54128214A (en) | 1978-03-29 | 1978-03-29 | Sampling quantizing device for picture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54128214A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6074772A (en) * | 1983-09-29 | 1985-04-27 | Matsushita Electric Ind Co Ltd | Quantizing method of multi-value picture information |
-
1978
- 1978-03-29 JP JP3630078A patent/JPS54128214A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6074772A (en) * | 1983-09-29 | 1985-04-27 | Matsushita Electric Ind Co Ltd | Quantizing method of multi-value picture information |
JPH0126591B2 (en) * | 1983-09-29 | 1989-05-24 | Matsushita Electric Ind Co Ltd |
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