Compression of color images based on a 2-dimensional discrete wa

Details Compression of color images based on a 2-dimensional discrete wa Compression of color images based on a 2-dimensional discrete wa

1998-05-21

2000-11-28

Le, Vu

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

37524011, 3483981, H04N 712

Patent

active

061544930

ABSTRACT:
What is disclosed is a method that includes splitting raw image data into a plurality of channels including color plane difference channels, and then compressing separately each of these channels using a two-dimensional discrete wavelet transform, the compression utilizing quantization, whereby the recovery of the compressed channel data yielding a perceptually lossless image. The method and apparatus operates on images directly in their Bayer pattern form. Quantization thresholds are defined for the quantizing which may vary depending upon the channel and DWT sub-band being processed.

REFERENCES:
patent: 5412427 (1995-05-01), Rabbani et al.
patent: 5495292 (1996-02-01), Zhang et al.
patent: 5541653 (1996-07-01), Peters et al.
patent: 5602589 (1997-02-01), Vishwanath et al.
patent: 5790705 (1998-08-01), Anderson et al.
patent: 5850482 (1998-12-01), Meany et al.
patent: 5880856 (1999-03-01), Ferriere
patent: 5901242 (1999-05-01), Crane et al.
Toi et al, "A Subband Coding Technique for Image Compression in Single CCD Cameras with Bayer Color Filter Arrays", IEEE Trans. on Cons. Electronics, vol. 45, No.1 , pp. 176-180, Feb. 1999.
Le Gall et al, "Subband Coding of Digital Images Using Symmetric Short Kernel Filters and Arithmetic Coding Techniques", IEEE, Bell Communications Research, Inc., pp. 761-764, Feb. 1999.

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