Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Reexamination Certificate
2006-06-20
2006-06-20
Dang, Duy M. (Department: 2627)
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
C382S232000
Reexamination Certificate
active
07065254
ABSTRACT:
To improve compression efficiency and decompressed image quality, images are decomposed into separate layers each containing a limited number of image element types (text, line art, or photographic). Each layer can then be compressed separately with a process that is optimal for the type of image element included in the layer. Images are decomposed into foreground, background, and mask layers. The value of a pixel in the mask layer designates whether the spatially corresponding pixel of the recomposed image will be selected from the spatially corresponding pixels of either the foreground or the background layer.
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Chernoff Vilhauer & McClung & Stenzel
Dang Duy M.
Sharp Laboratories of America Inc.
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