JPS5556764A - Noise elimination method for picture process - Google Patents
Noise elimination method for picture processInfo
- Publication number
- JPS5556764A JPS5556764A JP13087278A JP13087278A JPS5556764A JP S5556764 A JPS5556764 A JP S5556764A JP 13087278 A JP13087278 A JP 13087278A JP 13087278 A JP13087278 A JP 13087278A JP S5556764 A JPS5556764 A JP S5556764A
- Authority
- JP
- Japan
- Prior art keywords
- output
- latch
- density
- cumulative frequency
- picture element
- 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)
Abstract
PURPOSE: To realize an automatic elimination of the texture noise by setting the threshold level through the dynamic calculation of the density distribution with use of the picture elements on the first scanning line from the head to notice picture element.
CONSTITUTION: Counter 3 counts all picture elements on the first scanning line from the head to prescribed picture element to supply them to divider 4 where the cumulative predictive noise picture elements up to the notice picture element are delivered. While the output of latch 1 is supplied to address (1) of RAM5, where the cumulative frequency of the density is read out from the data by using the density level of the input data as the address. At the same time, the 1 count-up is given by adder 9, and thw writing is carried out based on the input data. Then the sequential increment is given from zero for counter 2. With every increment, the cumulative frequency of RAM5 is delivered, and the cumulative frequency distribution is calculated via adder 6 and latch 12. Then the threshold level is calculated when the output of latch 12 becomes larger than the output of divider 4 through comparator 7. As a result, multiplexer 11 is actuated to obtain the desired output.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13087278A JPS5556764A (en) | 1978-10-24 | 1978-10-24 | Noise elimination method for picture process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13087278A JPS5556764A (en) | 1978-10-24 | 1978-10-24 | Noise elimination method for picture process |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5556764A true JPS5556764A (en) | 1980-04-25 |
JPS646588B2 JPS646588B2 (en) | 1989-02-03 |
Family
ID=15044661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13087278A Granted JPS5556764A (en) | 1978-10-24 | 1978-10-24 | Noise elimination method for picture process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5556764A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 JP13087278A patent/JPS5556764A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5373029A (en) * | 1976-12-13 | 1978-06-29 | Nippon Telegr & Teleph Corp <Ntt> | Binary sampling methid of analog facsimile signal |
Also Published As
Publication number | Publication date |
---|---|
JPS646588B2 (en) | 1989-02-03 |
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