Image analysis – Image compression or coding – Adaptive coding
Patent
1994-06-03
1999-05-04
Kelley, Christopher S.
Image analysis
Image compression or coding
Adaptive coding
382128, G06K 936
Patent
active
059012498
ABSTRACT:
Wavelet transformation is carried out on an original image signal, and the original image signal is thereby decomposed into image signals, each being of one of a plurality of different frequency bands. The degree of importance of each of different portions of the image is then determined from one of the image signals or from the original image signal. Labeling processing is carried out on the image signal, from which the degree of importance of each of different portions of the image was determined, in accordance with the determined degree of importance of each of different portions of the image. The image signals are quantized in accordance with the results of the labeling processing such that a larger number of bits may be allocated to each of picture elements in a portion of the image determined as having a higher degree of importance. The quantized image signals are then encoded. The original image signal is thus compressed with a high compressibility such that the image quality of the important portion of the original image may not be lost.
REFERENCES:
patent: 4494144 (1985-01-01), Brown
patent: 4776029 (1988-10-01), Shimura
patent: 4802232 (1989-01-01), Altes
patent: 4851678 (1989-07-01), Adachi et al.
patent: 4931644 (1990-06-01), Adachi et al.
patent: 4967079 (1990-10-01), Shimura
patent: 5014198 (1991-05-01), Umemura
patent: 5038389 (1991-08-01), Mizuno
patent: 5086489 (1992-02-01), Shimura
patent: 5121216 (1992-06-01), Chen et al.
patent: 5282255 (1994-01-01), Bouik et al.
patent: 5488674 (1996-01-01), Burt et al.
"Wavelets and Signal Processing" (O. Rioul and M. Vetterli, IEEE Sp Magazine, Oct. 1991, pp. 14-38).
"Zero-Crossings of a Wavelet Transform" (S. Mallat, IEEE Transactions on Information Theory, vol. 37, No. 4, Jul. 1991, pp. 1019-1033).
"Image Coding Using Wavelet Transform" (M. Antonini, et al., IEEE Transactions on Image Processing, vol. 1, No. 2, Apr. 1992, pp. 205-220).
Fuji Photo Film Co. , Ltd.
Kelley Christopher S.
LandOfFree
Method for compressing image signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for compressing image signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for compressing image signals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1876045