Image analysis – Histogram processing – For setting a threshold
Patent
1989-03-28
1990-11-20
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 9, 382 22, 382 30, G06K 946
Patent
active
049724991
ABSTRACT:
A pattern recognition apparatus has a contour segmentation unit for dividing an input pattern into segments, a characteristic extraction unit for extracting characteristics of the input segments, and a reference unit for storing characteristic data of reference patterns. The reference unit includes a main reference and a detailed matching reference. The main reference stores partial pattern characteristic data representing the characteristics of segments of each reference pattern. The detailed matching reference stores detailed characteristic data of each reference pattern together with a program for specifying an operation procedures thereof. A matching processor sequentially compares and collates the input pattern with the reference patterns to find out that standard pattern with which the input pattern is matched with the highest similarity. When the input pattern is matched with several reference patterns, a detailed recognition unit performs a detailed recognition process using the detailed characteristic data of these reference patterns to finally select the correct one from among the reference patterns. The main reference additionally stores identification marks to identify specific reference segments necessary to acquired the above detailed characteristic data.
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Jung Yon
Kabushiki Kaisha Toshiba
Moore David K.
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