Pattern masking method and an apparatus therefor

Details Pattern masking method and an apparatus therefor Pattern masking method and an apparatus therefor

1986-10-02

1989-01-10

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

356237, 358106, 358107, 382 48, G06K 900

Patent

active

047979399

ABSTRACT:
A binarized image data group of an inspected object for a plurality of pixels arrayed in the sub-scanning direction is sequentially created in order along the main scanning direction to determine whether or not the pattern of an inputted image corresponds to a standard through-hole pattern on the basis of the binarized image data group. When the determination is of yes, through-hole diameter masking data are sequentially created in order along the main scanning direction to sequentially perform masking processing on the binarized image data group of the inspected object arrayed in the sub-scanning direction. Thus, the through-hole pattern is automatically detected to be subjected to masking processing, whereby an inspected object having through-holes can be inspected by a pattern matching method.

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patent: 4596037 (1986-06-01), Bouchard et al.
patent: 4644583 (1987-02-01), Watanabe et al.

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