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Vision Chip for Very Fast Detection of Motion Vectors: Design and Implementation

SUMMARY This paper gives a detailed presentation of a “vision chip” for a very fast detection of motion vectors. The chip’s design consists of a parallel pixel array and column parallel block-matching processors. Each pixel of the pixel array contains a photo detector, an edge detector and 4 bits of memory. In the detection of motion vectors, first, the gray level image is binarized by the edge detector and subsequently the binary edge data is used in the block matching processor. The block-matching takes place locally in pixel and globally in column. The chip can create a dense field of motion where a vector is assigned to each pixel by overlapping 2 × 2 target blocks. A prototype with 16 × 16 pixels and four block-matching processors has been designed and implemented. Preliminary results obtained by the prototype are