JPS5556765A - Noise elimination method for picture process - Google Patents
Noise elimination method for picture processInfo
- Publication number
- JPS5556765A JPS5556765A JP13087378A JP13087378A JPS5556765A JP S5556765 A JPS5556765 A JP S5556765A JP 13087378 A JP13087378 A JP 13087378A JP 13087378 A JP13087378 A JP 13087378A JP S5556765 A JPS5556765 A JP S5556765A
- Authority
- JP
- Japan
- Prior art keywords
- level
- threshold level
- picture
- picture information
- density
- 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
Abstract
PURPOSE: To realize an automatic elimination of the texture noise by setting the threshold level of the noise process by means of the density information around the notice picture element memorized in the memory.
CONSTITUTION: The picture data read in by scanner 1 is digitized through A/D converter 2 and every amount equivalent to the picture element and then written into memory 3. CPU4 reads out all picture information in sequence to produce the density distribution chart. Then the cumulative frequency from the white level is calculated to decide the 80∼90% level position as the threshold level for memorization. After this, CPU4 reads out newly the picture information from memory 3 to compare it with the threshold level. And in case the density level of the picture information is higher than the threshold level, the picture information is delivered directly to plotter 5; while the picture information is delivered in the form of zero when its density level is lower than the threshold level respectively. In such constitution, the texture noise can be eliminated automatically for any type of the original.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13087378A JPS5556765A (en) | 1978-10-24 | 1978-10-24 | Noise elimination method for picture process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13087378A JPS5556765A (en) | 1978-10-24 | 1978-10-24 | Noise elimination method for picture process |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5556765A true JPS5556765A (en) | 1980-04-25 |
JPS6336189B2 JPS6336189B2 (en) | 1988-07-19 |
Family
ID=15044684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13087378A Granted JPS5556765A (en) | 1978-10-24 | 1978-10-24 | Noise elimination method for picture process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5556765A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4589034A (en) * | 1980-12-05 | 1986-05-13 | Canon Kabushiki Kaisha | Image processing apparatus |
US6483544B1 (en) | 1994-03-18 | 2002-11-19 | Fujitsu Limited | Image processing method and image processing apparatus for executing gradation conversion of a pixel |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6430683U (en) * | 1987-08-17 | 1989-02-27 | ||
KR102274769B1 (en) * | 2018-11-30 | 2021-07-08 | 주식회사 딥서치 | Method for determining target company to be invested regarding a topic of interest and apparatus thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5350943A (en) * | 1976-10-20 | 1978-05-09 | Sumitomo Electric Ind Ltd | Binary circuit for analog signal |
JPS5373029A (en) * | 1976-12-13 | 1978-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Binary sampling methid of analog facsimile signal |
-
1978
- 1978-10-24 JP JP13087378A patent/JPS5556765A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5350943A (en) * | 1976-10-20 | 1978-05-09 | Sumitomo Electric Ind Ltd | Binary circuit for analog signal |
JPS5373029A (en) * | 1976-12-13 | 1978-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Binary sampling methid of analog facsimile signal |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4589034A (en) * | 1980-12-05 | 1986-05-13 | Canon Kabushiki Kaisha | Image processing apparatus |
US6483544B1 (en) | 1994-03-18 | 2002-11-19 | Fujitsu Limited | Image processing method and image processing apparatus for executing gradation conversion of a pixel |
Also Published As
Publication number | Publication date |
---|---|
JPS6336189B2 (en) | 1988-07-19 |
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