JPS5558670A - Picture processing system - Google Patents
Picture processing systemInfo
- Publication number
- JPS5558670A JPS5558670A JP13119078A JP13119078A JPS5558670A JP S5558670 A JPS5558670 A JP S5558670A JP 13119078 A JP13119078 A JP 13119078A JP 13119078 A JP13119078 A JP 13119078A JP S5558670 A JPS5558670 A JP S5558670A
- Authority
- JP
- Japan
- Prior art keywords
- picture element
- level
- density
- element region
- detected
- 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)
Abstract
PURPOSE: To eliminate granular noise and background dirt noise by performing density gradation correction according to the difference between the average level in the first specific picture element region adjacent to a noticed picture element and the minimum level in the second specific picture element region near the noticed picture element which is wider than the first specific picture element region above.
CONSTITUTION: Each picture element density of picture signals is sampled by A.D converter 1, and cumulative density frequency distribution for every sampling level in the first specific picture element region adjacent to noticed picture element S is taken according to the output of converter 1 by combination of adder 2 and memory 3, and density level a corresponding to the center value is detected. Then, the output converter 1 is sent to buffer memory 4, and picture signals of the second specific picture element region are accumulated there, and next, minimum density level c in the region is detected by comparator 5. Simultaneously, maximum and minimum densities d and e for every line are detected by comparator 5, and average values -d and -e are calculated by averaging circuit 6. Finally, operator 7 executes a prescribed operation on a basis of these outputs a, c, -d and -e, thereby performing gradation correction.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13119078A JPS5558670A (en) | 1978-10-25 | 1978-10-25 | Picture processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13119078A JPS5558670A (en) | 1978-10-25 | 1978-10-25 | Picture processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5558670A true JPS5558670A (en) | 1980-05-01 |
Family
ID=15052115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13119078A Pending JPS5558670A (en) | 1978-10-25 | 1978-10-25 | Picture processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558670A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5144456A (en) * | 1989-01-21 | 1992-09-01 | Ricoh Company, Ltd. | Image processing apparatus and method |
CN112738365A (en) * | 2015-07-16 | 2021-04-30 | 索尼公司 | Imaging apparatus and information processing system |
-
1978
- 1978-10-25 JP JP13119078A patent/JPS5558670A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5144456A (en) * | 1989-01-21 | 1992-09-01 | Ricoh Company, Ltd. | Image processing apparatus and method |
CN112738365A (en) * | 2015-07-16 | 2021-04-30 | 索尼公司 | Imaging apparatus and information processing system |
CN112738365B (en) * | 2015-07-16 | 2022-11-18 | 索尼公司 | Imaging apparatus and information processing system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4841374A (en) | Image processing method | |
JPS57188177A (en) | Picture signal processing device | |
JPS5781787A (en) | Error correcting device for digital television signal | |
JPS55162179A (en) | Picture processing method | |
JPS5558670A (en) | Picture processing system | |
JPS54118724A (en) | S/n improvement device for television video signal | |
JPS55102972A (en) | Removal unit for noise of picture | |
JPS5534704A (en) | Threshold setting circuit | |
MY130272A (en) | Color image segmentation method | |
JPS5599847A (en) | Digital integrator having leakage function and equalizing circuit using it | |
JPS5556761A (en) | Picture process system | |
JPS5723183A (en) | Picture processing method | |
JPS54124627A (en) | Signal compensating system | |
JPH0462226B2 (en) | ||
JPS5571353A (en) | Picture noise eliminating method | |
JPS5474622A (en) | Shading correction unit | |
JPS5558668A (en) | Picture signal processing system | |
JPS5723182A (en) | Picture processing method | |
JPS5543866A (en) | Front and back identifying device | |
JPS5558669A (en) | Picture processing system | |
JPS554108A (en) | Density corrector | |
JP3249341B2 (en) | Image processing device | |
JPS5727378A (en) | Picture processing system | |
JPS5556763A (en) | Picture process system | |
JPS5437624A (en) | Phase calibration system of facsimile equipment |