Image reduction of binary images using filtering processing

Details Image reduction of binary images using filtering processing Image reduction of binary images using filtering processing

1992-07-24

1993-12-14

Couso, Jose L.

Image analysis

Histogram processing

For setting a threshold

382 47, 358451, G06K 936

Patent

active

052710726

ABSTRACT:
An image reduction system which reduces binary level images is disclosed. In the system, a reduction pixel value is determined by using, as reference pixels for a filter operation: a plurality of surrounding pixels including an object pixel to be reduced; and reduced pixels, from among pixels which have already been reduced, said reduced pixels being at least; a reduced pixel located before the pixel to be determined: a reduced pixel, located on the preceding line, which lies directly above the pixel to be determined; and a reduced pixel before said reduced pixel located on the preceding line. When a pixel referenced during the filter operation is included in a specific pattern, an exception process for correcting binary level results is provided.

REFERENCES:
patent: 4703350 (1987-10-01), Hinman
patent: 4870695 (1989-09-01), Gonzales et al.
patent: 5086487 (1992-02-01), Katayama et al.
patent: 5159468 (1992-10-01), Yoshida et al.
Patent Abstracts of Japan, vol. 8, No. 275, (Kokai 59-142666), (Aug. 1984), (abstract).

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