Vehicle Speed Measurement using SAD Algorithm
Journal: The Journal of the Institute of Internet, Broadcasting and Communication (Vol.14, No. 5)Publication Date: 2014-10-31
Authors : Seong-Il Park; Jong-Dae Moon; Young-Hyuk Ko;
Page : 73-79
Keywords : SAD; Matlab; CCD; Image difference; Histogram;
Abstract
In this paper, we proposed the mechanism which can measure traffic flow and vehicle speed on the highway as well as road by using the video and image processing to detect and track cars in a video sequence. The proposed mechanism uses the first few frames of the video stream to estimate the background image. The visual tracking system is a simple algorithm based on the sum of absolute frame difference. It subtracts the background from each video frame to produce foreground images. By thresholding and performing morphological closing on each foreground image, the proposed mechanism produces binary feature images, which are shown in the threshold window. By measuring the distance between the "first white line" mark and the "second white line"mark proceeding, it is possible to find the car's position. Average velocity is defined as the change in position of an object divided by the time over which the change takes place. The results of proposed mechanism agree well with the measured data, and view the results in real time.
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