Method and unit for binary processing in image processing unit a

Details Method and unit for binary processing in image processing unit a Method and unit for binary processing in image processing unit a

1991-01-28

1993-09-07

Razavi, Michael T.

Image analysis

Histogram processing

For setting a threshold

382 50, 358465, 358466, G06K 938

Patent

active

052436683

ABSTRACT:
A method and apparatus for binarizing a variable density image wherein brightness of the variable density image is changed by 1
(where n is an integer of 2 or above), and an expansion processing is carried out on the brightness changed image to generate an expanded image. A smoothing processing is performed on the expanded image to generate a smoothed image and a differential image is generated by taking a difference between the smoothed image and the variable density image. The differential image is binarized by comparing the differential image to a predetermined threshold.

REFERENCES:
patent: 4562486 (1985-12-01), Suzuki et al.
patent: 4821334 (1989-04-01), Ogino et al.
patent: 4823194 (1989-04-01), Mishima et al.
patent: 5025478 (1991-06-01), Morris et al.

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