Video correlator for video format unit

Details Video correlator for video format unit Video correlator for video format unit

1984-08-13

1986-07-15

Kreitman, Stephen A.

Image analysis

Histogram processing

For setting a threshold

G06K 962

Patent

active

046010564

ABSTRACT:
A video correlator is provided for use in an image processing system wherein video data representative of a document image or portions thereof is received in a gray level data format in which the image is composed of a plurality of cells for enhancing the black/white characterization of each cell. The correlator includes structure for comparing a cell's gray level data with the average gray level of a preselected number of surrounding cells. Structure is also provided for automatically selecting the number of surrounding cells for determining the average gray level.

REFERENCES:
patent: 3502806 (1970-03-01), Townsend
patent: 4020463 (1977-04-01), Himmel
patent: 4145686 (1979-03-01), McMurray et al.
patent: 4468809 (1984-08-01), Grabowski et al.

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