JPS57125804A - System for detecting position of vehicle existence - Google Patents
System for detecting position of vehicle existenceInfo
- Publication number
- JPS57125804A JPS57125804A JP56012523A JP1252381A JPS57125804A JP S57125804 A JPS57125804 A JP S57125804A JP 56012523 A JP56012523 A JP 56012523A JP 1252381 A JP1252381 A JP 1252381A JP S57125804 A JPS57125804 A JP S57125804A
- Authority
- JP
- Japan
- Prior art keywords
- scanning line
- value
- road
- threshold
- values
- 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
- Geophysics And Detection Of Objects (AREA)
- Traffic Control Systems (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE: To detect the existence position of a vehicle, by scanning the lane image, which is obtained by the crane shot of a road, from left to right and from the top to the bottom successively and obtaining the difference between a threshold and sample values sampled in scanning directions and eliminating the noise signal due to characters on the road.
CONSTITUTION: Only picture information corresponding to a lane is extracted from picture information obtained by the crane shot of a road; and on a basis of the space differentiation between sample values corresponding to picture elements in the direction of the scanning line, a value "1" is set if the absolute value of the differential coefficient exceeds a preliminarily set threshold, and a value "0" is set otherwise. The value of a feature signal corresponding to the scanning line is set to 1 if the number of values "1" on the same scanning line exceeds a preliminarily set threshold, and this value is set to 0 otherwise. If the number of values "1" on the same scanning line coincides with or approximates a forecasted noise threshold, the feature signal corresponding to the scanning line is set to 0, and thus, the false signal due to characters or the like on the road is eliminated to extract features of the objective photography range, thus obtaining the leading position and the trailing position of a vehicle.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56012523A JPS57125804A (en) | 1981-01-30 | 1981-01-30 | System for detecting position of vehicle existence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56012523A JPS57125804A (en) | 1981-01-30 | 1981-01-30 | System for detecting position of vehicle existence |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57125804A true JPS57125804A (en) | 1982-08-05 |
| JPS6356921B2 JPS6356921B2 (en) | 1988-11-09 |
Family
ID=11807693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56012523A Granted JPS57125804A (en) | 1981-01-30 | 1981-01-30 | System for detecting position of vehicle existence |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57125804A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111524353A (en) * | 2020-04-28 | 2020-08-11 | 中国计量大学 | Method for traffic text data for speed prediction and travel planning |
-
1981
- 1981-01-30 JP JP56012523A patent/JPS57125804A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111524353A (en) * | 2020-04-28 | 2020-08-11 | 中国计量大学 | Method for traffic text data for speed prediction and travel planning |
| CN111524353B (en) * | 2020-04-28 | 2021-08-17 | 中国计量大学 | Method for traffic text data for speed prediction and travel planning |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6356921B2 (en) | 1988-11-09 |
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