Method of any apparatus for converting gradient of image data

Details Method of any apparatus for converting gradient of image data Method of any apparatus for converting gradient of image data

1995-06-06

1996-07-16

Uso, Jose L.

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

382254, 382270, 358455, G06K 938

Patent

active

055374964

ABSTRACT:
A gradient conversion table is supplied with N-bit input image data and outputs M-bit image data, and a random-number generator outputs K-bit random-number data (M.gtoreq.K). An adder adds the K-bit random-number data to low-order K bits of the M-bit image data outputted from the gradient conversion table, and outputs high-order L bits {L>(M-K)} of the sum as output image data. Low-order bits of the output image data are dispersed to produce an image with any banding of low visibility.

REFERENCES:
patent: 4757552 (1988-07-01), Asano et al.
patent: 5038223 (1991-08-01), Yamada
patent: 5101452 (1992-05-01), Tsai et al.
patent: 5123059 (1992-06-01), Hirosaw et al.
patent: 5125045 (1992-06-01), Murakawi et al.
patent: 5159470 (1992-10-01), Ishida et al.

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