Feature extracting apparatus

Details Feature extracting apparatus Feature extracting apparatus

1994-08-01

1996-02-06

Mancuso, Joseph

Image analysis

Pattern recognition

Feature extraction

382260, G06K 956

Patent

active

054902240

ABSTRACT:
This invention provides a feature extracting circuit including a shift register section arranged to store an image for a predetermined number of lines, the image consisting of a predetermined number of bits, and then to shift the image; a look-up table section for transforming a set of partial image data for a predetermined number of pixels supplied from the shift register section into a direction index and then for outputting the direction index; and a counter section for counting the direction index output from the look-up table section. The feature extracting circuit receives a binary digital image and extracts, as a feature of the image, a direction index which indicates the direction in which the boundary between adjacent black and white pixels extends.

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Lee, "Digital Circuits and Logic Design", 1977, p. 576, Prentice Hall Inc.
"Implementation of Cellular-Logic Operator Using 3*3 Convolution and Table Lookup Hardware", Computer, Vision, Graphics & Image Processing, vol. 27, No. 1, pp. 115-123.

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