JPS5757089A - Noise eliminating device - Google Patents
Noise eliminating deviceInfo
- Publication number
- JPS5757089A JPS5757089A JP55132610A JP13261080A JPS5757089A JP S5757089 A JPS5757089 A JP S5757089A JP 55132610 A JP55132610 A JP 55132610A JP 13261080 A JP13261080 A JP 13261080A JP S5757089 A JPS5757089 A JP S5757089A
- Authority
- JP
- Japan
- Prior art keywords
- line
- inter
- circuit
- integrated
- converted
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/409—Edge or detail enhancement; Noise or error suppression
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To prevent the noise from remaining in the inter-line part even if the ground level is comparatively high, by detecting whether a line to be converted to a binary is a character line or an inter-line part on the original and by outputting the white level for the inter-line part. CONSTITUTION:An input signal (a) is converted to a binary with three thresholds S1-S3 by a comparing circuit 1 and an accumulating circuit 2, and the number of black picture elements in one main scanning line is integrated, and integrated values C1-C3 are outputted synchronously with t2 and are cleared. These values C1-C3 are converted to binaries by a comparing circuit 3 and are stored in a pattern storage circuit 4. In an accumulating circuit 5 and a comparing circuit 6, the number of lines, which are estimated as character lines, in each stored pattern is integrated, and stored patterns which are proper as character lines and inter-line patterns are discriminated from each other by the integrated value. In disciminating logical operation circuit 7, it is discriminated on a basis of the proper pattern whether the noticed line scans characters or the inter-line part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55132610A JPS5757089A (en) | 1980-09-24 | 1980-09-24 | Noise eliminating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55132610A JPS5757089A (en) | 1980-09-24 | 1980-09-24 | Noise eliminating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5757089A true JPS5757089A (en) | 1982-04-06 |
Family
ID=15085348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55132610A Pending JPS5757089A (en) | 1980-09-24 | 1980-09-24 | Noise eliminating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5757089A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5329382A (en) * | 1991-03-04 | 1994-07-12 | Eastman Kodak Company | Image scanner |
-
1980
- 1980-09-24 JP JP55132610A patent/JPS5757089A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5329382A (en) * | 1991-03-04 | 1994-07-12 | Eastman Kodak Company | Image scanner |
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