Method for determining background or object pixel for digitizing

Details Method for determining background or object pixel for digitizing Method for determining background or object pixel for digitizing

1997-04-15

1999-11-09

Au, Amelia

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

358462, 358466, G06K 938

Patent

active

059829435

ABSTRACT:
A method for determining whether a pixel of a digitized image is a background or object pixel includes the steps of determining whether the pixel is in a static state or a transient state according to the variation in its gray-level compared with the gray-level of an adjacent pixel located in a first direction, setting a static threshold if the pixel is in the static state or a dynamic threshold if the pixel is in the transient state, comparing the gray-level of the pixel and the applicable threshold to determine whether the pixel is a background or object pixel, and repeating the determination with respect to static or dynamic thresholds, as applicable, in a second direction.

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