US 7,460,691 B2 · Image processing techniques for a video based traffic monitoring system and methods therefor

Abstract

The present disclosure relates to a number of inventions directed, generally, to the application of image processing techniques to traffic data acquisition using video images. The inventions reside in a traffic monitoring system, the basic function of which is for traffic data acquisition and incident detection. More specifically, the application of image processing techniques for the detection of vehicle, from sequence of video images, as well as the acquisition of traffic data and detection of traffic incident. In one aspect, the present invention provides a method of processing images received from a video based traffic monitoring system. In another aspect, the present invention is directed to a Region Of Interest (ROI) for detection of a moving vehicle and a further aspect is directed to a method of detecting day or night status in a traffic monitoring system. It's The application of various algorithms to a video based traffic monitoring system is also considered inventive. Other inventive aspects of the present traffic monitoring system are outlined in the claims.

Claims10

Dependent claims

A method of detecting a vehicle within a chevron area in a traffic monitoring system, the method comprising the steps of:

applying a gray level co-occurrence matrix for the extraction of texture features of a region of interest;
calculating two texture measurements using the gray level co-occurrence matrix, the two texture measurements comprising an angular second moment and a contrast;
comparing the angular second moment ASM and the contrast CON, with a background angular second moment ASMB and a background contrast CONB, the background angular second moment and background contrast measured when no vehicle is present,);
and
determining if (|ASMB−ASM|>ASMTH-AND|CONB−CON|<+(CONTh),
wherein if (|ASMB−ASM|>ASMTH-AND |CONB−CON|<+(CONTh), then a vehicle is not present.

3 more elements

Dependencies are inferred from the claim text.

Image processing techniques for a video based traffic monitoring system and methods therefor

Life of this patent

Image processing techniques for a video based traffic monitoring system and methods therefor

Life of this patent

Abstract

Claims10