Compression techniques for substantially lossless digital image

Details Compression techniques for substantially lossless digital image Compression techniques for substantially lossless digital image

1996-09-13

1998-08-04

Rogers, Scott

Image analysis

Image compression or coding

Lossless compression

382251, 341 55, 341 95, G06T 900, H03M 700, H03M 730

Patent

active

057907056

ABSTRACT:
A method for compressing digital image of more than a first predetermined number into the first predetermined number of bits in a substantially lossless manner includes determining a plurality of ranges in which input image data falls and comparing current image data with the plurality of ranges. The method further includes preserving a second predetermined number of bits of the current image data based upon which of the plurality of ranges the current image data falls to encode the current image data as an image value comprising the first predetermined number of bits.
A system includes means for determining a plurality of ranges in which input image data falls and means for comparing current image data with the plurality of ranges, the means for comparing coupled to the means for determining. The system further includes means for preserving a second predetermined number of bits of the current image data based upon which of the plurality of ranges the current image data falls to encode the current image data as an image value comprising the first predetermined number of bits, the means for preserving coupled to the means for determining and the means for comparing.

REFERENCES:
patent: 4853969 (1989-08-01), Weideman
patent: 5041830 (1991-08-01), Abe
patent: 5428567 (1995-06-01), Horvath et al.

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