Image data compression having minimum perceptual error

Details Image data compression having minimum perceptual error Image data compression having minimum perceptual error

1994-01-25

1995-06-20

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358432, 358433, 382232, H04N 141, H04N 1415, G06K 936

Patent

active

054265126

ABSTRACT:
A method for performing image compression that eliminates redundant and invisible image components. The image compression uses a Discrete Cosine Transform (DCT) and each DCT coefficient yielded by the transform is quantized by an entry in a quantization matrix which determines the perceived image quality and the bit rate of the image being compressed. The present invention adapts or customizes the quantization matrix to the image being compressed. The quantization matrix comprises visual masking by luminance and contrast techniques and by an error pooling technique all resulting in a minimum perceptual error for any given bit rate, or minimum bit rate for a given perceptual error.

REFERENCES:
patent: 4386366 (1983-05-01), Mori
patent: 4776030 (1988-10-01), Tzou
patent: 4780761 (1988-10-01), Daly et al.
patent: 4783841 (1988-11-01), Crayson
patent: 4831636 (1989-05-01), Taniguchi et al.
patent: 4920426 (1990-04-01), Hatori et al.
patent: 5101280 (1992-05-01), Moronaga et al.
patent: 5121216 (1992-06-01), Chen et al.
patent: 5170264 (1992-12-01), Saito et al.
"Luminance-Model-Based DCT Quantization for Color Image Compression" of A. J. Ahumada et al, published in 1992 in Human Vision, Visual Processing, and Digital Display III Proc. SPIE 1666, paper 32.
"An Improved Detection Model for DCT Coefficient Quantization" of H. A. Peterson et al, published in 1993 in Human Vision, Visual Processing and Digital Display VI SPIE vol. 1913, pp. 191-201.
"DCT Quantization Matrices Visually Optimized for Individual Images" of A. B. Watson, published no earlier than Feb. 1993 in Human Vision, Visual Processing and Digital IV, Proc. 1913-14.

Affiliated with

Also associated with

Rating

Image data compression having minimum perceptual error does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image data compression having minimum perceptual error, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image data compression having minimum perceptual error will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1848165