Apparatus for encoding an image signal having a still object

Details Apparatus for encoding an image signal having a still object Apparatus for encoding an image signal having a still object

1995-07-24

1998-12-01

Couso, Jose L.

Image analysis

Image compression or coding

Contour or chain coding

382232, 348397, 348410, G06K 948

Patent

active

058450122

ABSTRACT:
An apparatus, capable of improving the overall coding efficiency by encoding an image signal having a still object based on an improved object oriented coding technique, comprises a first detector for detecting a contour image signal placed at the boundary of the object within the image signal and for encoding the detected contour image signal, to thereby generate a first encoded image signal; a divider for dividing the image signal into a plurality of image blocks with a predetermined identical size; a second detector for detecting image blocks containing the contour image signal from the image blocks and for generating a reconstructed image block for each of the detected image blocks; an encoder, responsive to a selection signal corresponding to the type of the image blocks, for selectively encoding the reconstructed image blocks or the non-detected image blocks, to thereby produce a second encoded image signal; and a formatter for formatting the first and the second encoded image signals.

REFERENCES:
patent: 4951140 (1990-08-01), Ueno
patent: 5491514 (1996-02-01), Fukuda et al.
patent: 5491761 (1996-02-01), Kim
patent: 5612744 (1997-03-01), Lee et al.
Chen et al., "Scene Adaptive Coder", Mar. 1984, IEEE Transactions on Communications, vol. Com. 32, No. 3, pp. 225-232.
Hotter, "Object-oriented Analysis-Synthesis Coding Based on Moving Two-Dimensional Objects", 1990, Signal Processing: Image Communication 2, pp. 409-428.

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