Image analysis – Image compression or coding – Contour or chain coding
Patent
1997-06-05
1999-03-09
Couso, Jose L.
Image analysis
Image compression or coding
Contour or chain coding
G06K 936
Patent
active
058811753
ABSTRACT:
In an encoding method for use in an encoder to encode an image signal including an object having object pixels, a background having background pixels and a contour signal representing the contour of the object, the contour signal is first encoded based on mask data having first and second binary values to designate an object pixel and a background pixels, respectively and then decoded to generate a decoded contour. In the mean time, a primary padded image signal obtained by applying a primary padding on the image signal is divided into multiplicity of equal-sized primary padded blocks and then each of the primary padded blocks is defined either as a contour block or as an object block based on the decoded contour to thereby select contour blocks and object blocks. Thereafter, each of the contour blocks are masked based on the decoded contour to form each of corresponding masked blocks by replacing every pixel value inside the decoded contour with a first binary value, respectively and every pixel value outside the decoded contour with a second binary value, respectively to thereby supply a multiplicity of corresponding masked blocks. And then, each of the contour blocks are padded based on the mask data and said each of corresponding masked blocks, thereby providing padded contour blocks and in turn the padded contour blocks and the object blocks are encoded to thereby provide an encoded texture signal of the image signal.
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Couso Jose L.
Daewoo Electronics Co. Ltd.
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