This paper discusses the methods of improving the efficiency and exactitude of the road conditions test though the modeling test algorithm. It presents the data structure of road model in which double direction data chain can be established. There are two clipping windows, Wout and Wcontour. Wout would eliminate the lines that can’t intersect rapidly. The lines that maybe intersect would be estimated exactly by Wout after coordinates transforming.Thealgorithms of the road conditions testing are proved to be efficacious.

According to the uneven illumination or the very complex background cases, global threshold value method can't correctly to binary particle image; this paper puts forward a kind of background correction method and the OTSU for particle image binary method. It's used background correction method to eliminate the influence of uneven illumination, and the OTSU for binary particle image. Combining with the above methods are tested, and the result shows that, after the background is corrected, we segment the background brightness particle image; the OTSU can obtain ideal image segmentation effect.