专利汇可以提供Pattern matching circuit专利检索,专利查询,专利分析的服务。并且PURPOSE: To rapidly execute generalized Hough transformation by providing the circuit with a density image memory, a histogram two-dimensional data forming part, a data compression part, a reference table memory, an address conversion part, an accumulating operation part, and a parameter determination part.
CONSTITUTION: The density value of a feature image appropriate for the recognition of an input image or its density image is stored in the density image memory 3 and the histogram two-dimensional data of respective picture elements in the memory 3 are formed by the histogram two-dimensional data forming part 4 and stored in a histogram two-dimensional data memory 9. The data compression part 10 compresses the data stored in the memory 9 also as two-dimensional data size and the bit length of a histogram value and a reference table memory 15 specifies N feature points and simultaneously sets up also a reference point. Then, a distance (r) between each feature point and the reference point and an azimuth angle ϕ are calculated and address conversion is executed by an address conversion part 17 to calculate the candidate coordinate values XG', YG' of the reference point. Thus, rapid processing is attained.
COPYRIGHT: (C)1990,JPO&Japio,下面是Pattern matching circuit专利的具体信息内容。
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