Image processing method, image processing device, and data recording medium
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United States of America Patent
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Feb 10, 2004
Grant Date -
N/A
app pub date -
Aug 17, 1999
filing date -
Jan 10, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hierarchical image coding apparatus of the present invention, as shown in FIG. 1, comprises a subsampling unit for subsampling a high-resolution image signal Hg as an input image signal to produce a low-resolution image signal LSg, a low-resolution coding section for sequentially coding the low-resolution image signal LSg for each block comprising a plurality of pixels, and a high-resolution coding section for sequentially coding the high-resolution image signal for each block comprising a plurality of pixels, wherein the high-resolution image signal HSg is coded by referring to the low-resolution image signal LSg corresponding to a reference low-resolution block located at the same spatial position as a target high-resolution block to be coded. In the hierarchical image coding apparatus so constructed, an image signal including shape information of an object can be hierarchically coded without degrading coding efficiency.
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