JPS5725076A - Method for binary-coding of video signal - Google Patents
Method for binary-coding of video signalInfo
- Publication number
- JPS5725076A JPS5725076A JP9996080A JP9996080A JPS5725076A JP S5725076 A JPS5725076 A JP S5725076A JP 9996080 A JP9996080 A JP 9996080A JP 9996080 A JP9996080 A JP 9996080A JP S5725076 A JPS5725076 A JP S5725076A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- value
- binary
- epsilon
- video
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE:To execute the binary-coding of a low contrast video signal, by deriving an average value of partial brightness from a video signal, and deriving a threshold level to a video value of the center of its local area, from the average value. CONSTITUTION:An average digital value Vav of a video signal being in the proximity of a sample point (i) is derived in order from a video signal 1 which is obtained from an image pickup device, and is compared with a reference video digital value V in a comparing circuit 6. Depending on whether the average value Vav of the video signal is larger or smaller than the reference value V, epsilon, omicron, or -epsilon is selected in a selecting circuit 7, and epsilon or -epsilon is added to the average value Vav of the video signal in an adding circuit 8, which is outputted as a threshold value to a binary-coding circuit 9. The binary-coding circuit 9 compares a digital video value Vi of the sample point (i) to the video signal, with an output of the adding circuit 8, and outputs a signal 10 for changing to a binary picture element, in the sample point (i).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9996080A JPS5725076A (en) | 1980-07-23 | 1980-07-23 | Method for binary-coding of video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9996080A JPS5725076A (en) | 1980-07-23 | 1980-07-23 | Method for binary-coding of video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5725076A true JPS5725076A (en) | 1982-02-09 |
Family
ID=14261241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9996080A Pending JPS5725076A (en) | 1980-07-23 | 1980-07-23 | Method for binary-coding of video signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5725076A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134693A (en) * | 1983-12-23 | 1985-07-17 | Shimadzu Corp | Picture processor |
| JPS6189955U (en) * | 1984-11-16 | 1986-06-11 | ||
| US8371408B2 (en) | 2009-01-09 | 2013-02-12 | Yanmar Co., Ltd. | Bonnet structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5122333A (en) * | 1974-08-20 | 1976-02-23 | Oki Electric Ind Co Ltd |
-
1980
- 1980-07-23 JP JP9996080A patent/JPS5725076A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5122333A (en) * | 1974-08-20 | 1976-02-23 | Oki Electric Ind Co Ltd |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60134693A (en) * | 1983-12-23 | 1985-07-17 | Shimadzu Corp | Picture processor |
| JPS6189955U (en) * | 1984-11-16 | 1986-06-11 | ||
| US8371408B2 (en) | 2009-01-09 | 2013-02-12 | Yanmar Co., Ltd. | Bonnet structure |
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