Image recognition edge detection method and system

Details Image recognition edge detection method and system Image recognition edge detection method and system

1988-03-31

1990-11-06

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 27, 382 30, G06K 948

Patent

active

049692020

ABSTRACT:
A system and method for determining and representing the edges of an object in an image frame formed of a two dimensional array of pixels represented by a first array of values, each value representing the gray scale of a separate pixel in the image frame. A second two dimensional array of values is produced comprising a first value for each pixel whose gray scale value is less than or equal to the threshold value and a second value for each pixel whose gray scale value is greater than the threshold value. Square groupings of four values in the second array of values are examined and a third two dimensional array of values is produced to correspond to the arrangement of the square groupings of four adjacent pixels, each of the values in the third array having a third value if diagonally located values of the grouping are the same, and having a fourth value if the diagonally located values of the grouping are different.

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