JPS56132061A - Dot picture signal detection - Google Patents
Dot picture signal detectionInfo
- Publication number
- JPS56132061A JPS56132061A JP3507380A JP3507380A JPS56132061A JP S56132061 A JPS56132061 A JP S56132061A JP 3507380 A JP3507380 A JP 3507380A JP 3507380 A JP3507380 A JP 3507380A JP S56132061 A JPS56132061 A JP S56132061A
- Authority
- JP
- Japan
- Prior art keywords
- picture
- picture element
- correlative
- probabilities
- minimum value
- 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
- H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To detect a dot picture signal automatically from the picture signal obtained from the original picture, by obtaining correlative probabilities between the state of the first picture element and the state of the second picture element, which is a prescribed address distant from the first picture element, in a prescribed retrieval range and by detecting the minimum value among these correlative probabilities. CONSTITUTION:Correlative probability P between state A of the first picture element in address (x, y) and address (x+alpha, y+beta) which is alpha picture element and beta picture element distant from the first picture element in the X direction and the Y direction respectively is obtained in a prescribed retrieval range by the expression. One or both of intervals of alpha and beta picture elements are changed to obtain respective correlative probabilities P, and it is detected whether a minimum value exists among these correlative probabilities P or not. The picture element in the retrieval range corresponding to the minimum value is detected as a dot picture in accordance with existence of this minimum value, and thus, the dot picture signal is detected automatically from the picture signal obtained from the original picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3507380A JPS56132061A (en) | 1980-03-19 | 1980-03-19 | Dot picture signal detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3507380A JPS56132061A (en) | 1980-03-19 | 1980-03-19 | Dot picture signal detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56132061A true JPS56132061A (en) | 1981-10-16 |
Family
ID=12431816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3507380A Pending JPS56132061A (en) | 1980-03-19 | 1980-03-19 | Dot picture signal detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56132061A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58218272A (en) * | 1982-06-11 | 1983-12-19 | Matsushita Electric Ind Co Ltd | Halftone detector |
| JPS58218271A (en) * | 1982-06-11 | 1983-12-19 | Matsushita Electric Ind Co Ltd | Halftone picture image detector |
| JPS58218270A (en) * | 1982-06-11 | 1983-12-19 | Matsushita Electric Ind Co Ltd | Halftone picture image detector |
-
1980
- 1980-03-19 JP JP3507380A patent/JPS56132061A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58218272A (en) * | 1982-06-11 | 1983-12-19 | Matsushita Electric Ind Co Ltd | Halftone detector |
| JPS58218271A (en) * | 1982-06-11 | 1983-12-19 | Matsushita Electric Ind Co Ltd | Halftone picture image detector |
| JPS58218270A (en) * | 1982-06-11 | 1983-12-19 | Matsushita Electric Ind Co Ltd | Halftone picture image detector |
| JPH0153826B2 (en) * | 1982-06-11 | 1989-11-15 | Matsushita Denki Sangyo Kk |
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