Signal encoding and decoding system

Details Signal encoding and decoding system Signal encoding and decoding system

1991-10-22

1993-09-21

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358426, G06K 936, H04N 141

Patent

active

052475905

ABSTRACT:
An encoding/decoding apparatus is described wherein an encoding apparatus comprises a feature-image-extracting section, a three-dimensional shape model adjustment section, a brightness information detection section, a patch dividing section and a threshold processing section, and a decoding apparatus comprises a three-dimensional shape model forming section and a synthesizing section. Feature image information extracted from input signals by the extracting section is adjusted with three-dimensional shape basic model information by the adjustment section and then a brightness diffusion value for each triangle patch constituting the adjusted three-dimensional shape model is detected by the detection section. When the detected diffusion value is larger than a predetermined value, the processing section subjects the dividing section to divide the patch into three small patches, and the brightness diffusion value for each small patch is further detected by the detecting section, while the former is lower than the latter, the processing section encodes the brightness information for the patch by referring to a code book storing different brightness information. The encoded information is then transmitted to the decoding apparatus, together with the divided patch information. At the decoding apparatus, output image signals are reproduced from the received information by referring to the contents of a three-dimensional shape model database and a brightness information dynamic code book.

REFERENCES:
patent: 4525858 (1985-06-01), Cline et al.
patent: 4590465 (1986-05-01), Fuchs
patent: 5025375 (1991-06-01), Sugawara
patent: 5038383 (1991-08-01), Usumoto et al.
patent: 5052045 (1991-09-01), Peregrim et al.
patent: 5056154 (1991-10-01), Aono et al.
patent: 5065446 (1991-11-01), Suzuki et al.
patent: 5144688 (1992-09-01), Bovir et al.
J. Ostermann et al "Object-Oriented Analysis-Synthesis Coding based on Moving 3D objects" 1989 pp. 1-2.
Galla et al "Facial Features Extraction in Video Telephone Images" (no date).
Aizawa et al "Model-Based Analysis Synthesis Image Coding System for Very Low-Rate Image Transmission" (no date).

Affiliated with

Also associated with

Rating

Signal encoding and decoding system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal encoding and decoding system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal encoding and decoding system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1056428