Pattern matching method
专利汇可以提供Pattern matching method专利检索，专利查询，专利分析的服务。并且PURPOSE: To make the sampling spacing of a feature value for matching to be large, and reduce the amount of calculation for a generalized Hough transformation by converting a gradation picture of the feature point to be the pattern matching input into a 2-dimensional data of a local histogram.
CONSTITUTION: The gradation value of the picture feature stored in a gradation picture memory 3 is quantized with a preliminarily designated quantization number, and for every picture element selected by the preliminarily set sampling spacing, the local histogram of the feature value is calculated for neighbouring picture elements in the neighbourhood of a designated size with the selected picture at the center by a histogram 2-dimensional data generation part 4. A reference point is set in the picture when preparing a reference table as a standard, and the distance between the reference point and the designated plural feature points of the object, azimuth, and the information of a histogram frequency value column are stored in a reference table memory 12. Thus, the sampling number can be reduced and the amount of conversion processing can be reduced without the deterioration of the recognition ability, and the conversion processing can be executed at high speed.
COPYRIGHT: (C)1992,JPO&Japio，下面是Pattern matching method专利的具体信息内容。
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