Methods for compressing and re-constructing a color image in a c

Details Methods for compressing and re-constructing a color image in a c Methods for compressing and re-constructing a color image in a c

1998-03-13

2000-11-21

Mancuso, Joseph

Image analysis

Color image processing

Compression of color images

G06K 900, G06K 936

Patent

active

061514098

ABSTRACT:
We discloses an efficient method for compressing a color image, visual block pattern truncation coding (VBPTC), in which the conventional block truncation coding (BTC) serves to encode an original image. This method defines the edge block according to human visual perception. If the difference between the two quantized values of BTC in a block is larger than a threshold which is defined by visual characteristics, the block will be identified as an edge block. In an edge block, the bitmap is adapted to compute block gradient orientation and to match the block pattern.

REFERENCES:
patent: 5392072 (1995-02-01), Rodriguez et al.
patent: 5978098 (1999-11-01), Takeuchi et al.

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