Method and apparatus for dynamically setting a background level

Details Method and apparatus for dynamically setting a background level Method and apparatus for dynamically setting a background level

1990-10-19

1992-02-04

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 52, 382 9, 358466, G06K 938, G06K 934, H04N 140

Patent

active

050864858

ABSTRACT:
An apparatus for determining a background level of an image to be scanned. The apparatus builds a series of histograms of the image each corresponding to a line of the image, analyzes each of the histograms, and averages the results of the analysis, to continually update a background level during the scan of the image. The apparatus may be implemented with a simple architecture capable of operating at high speed.

REFERENCES:
patent: 4963036 (1990-10-01), Drisko et al.

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