Method and apparatus for encoding pictures including a moving ob

Details Method and apparatus for encoding pictures including a moving ob Method and apparatus for encoding pictures including a moving ob

1993-10-21

1997-04-29

Razavi, Michael T.

Image analysis

Image compression or coding

Interframe coding

382103, 382209, 348169, 348407, G06T 900

Patent

active

056257155

ABSTRACT:
A method of encoding a sequence of images including a moving object, comprises forming an initial template, extracting a mask outlining the object, dividing the template into a plurality (for example sixteen) sub-templates, searching the next frame to find a match with the template, searching the next frame to find a match with each of the sub-templates, determining the displacements of each of the sub-templates with respect to the template, using the displacements to determine affine transform coefficients and performing an affine transform to produce an updated template and updated mask. Encoding is performed at a higher resolution for portions within the outline than for portions outside the outline.

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Badique, "Knowledge-Based Facial Area Recognition and Improved Coding in a CCITT-Compatible Low-Bitrate Video-Codec," Picture Coding Symposium Mar. 26, 1990.
Karmann et al., "Moving Object Recognition Using an Adaptive Background Memory," Time-Varying Image Processing and Moving Object Recognition, Ed. V. Capellini, pp. 289-296.

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