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A method of measuring the preceding vehicle distance based on trilinear method is proposed in the paper. According to the theory and method of the computer vision, three mutually non-coincident parallel lines have same vanishing point and different slopes on imaging plane. Without iteration and optimization calculation, an analytic expression of the external parameters of a camera??vanishing point...
A new image encryption algorithm is proposed by combining the cat mapping and the standard mapping of conservative chaotic systems. The proposed algorithm first produces chaotic sequence by using the standard mapping; then the sequence is discretized. Two values, which are used as the parameters of the cat mapping to realize the scrambling encryption for images, are extracted. In the end, the alternative...
As a novel display material, OLED attracts more and more attention in recent years. This paper researches on the OLED scanning control circuit, and puts forward a novel adjustable grayscale scan method which adopts random weight algorithm after studying different scan schemes. Considering the efficiency of scan buffer unit, a dual radix interleaving clock architecture is proposed in the paper, and...
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