Abstract:

The video detection of tragic parameters is of vital importance to the intelligent transportation system, and the segmentation of moving vehicles constitutes one of the key steps in video detection. However, it is difficult to accurately and effectively detect and remove the shadow of moving vehicles in the segmentation process of moving vehicles. In this paper, the principle of texture constancy in the gradient direction is discovered and proved. Based on the principle, a method of detecting and removing the shadow of moving vehicles is proposed. In this method, a background gradient vectorgraph of highway surface is set up and compared with that of the present frame image to judge whether the graph represents the highway surface background or the moving vehicle. The moving vehicles are then accurately segmented after the morphological filtering for remedying inside cavities and rejecting isolated points. Test results indicate that the proposed method is applicable and effective..

Key words: shadow detection, vehicle segmentation, gradient direction, traffic video