Image analysis – Image compression or coding
Patent
1995-11-21
1999-09-07
Couso, Jose L.
Image analysis
Image compression or coding
G06K 936
Patent
active
059499087
ABSTRACT:
A device for decoding coded image data divided into a plurality of blocks so as to generate decoded image data by applying an inverse orthogonal transformation to each block of the plurality of blocks includes a quantization-information detecting unit detecting block-quantization-step-size information indicative of quantization step sizes used for the plurality of blocks. The device also includes a variable-gain-low-pass filter reducing high frequency components of the decoded image data in a predetermined proximity of borders of the plurality of blocks based on the block-quantization-step-size information, the high frequency components having frequencies higher than a predetermined frequency.
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Couso Jose L.
Meller Michael N.
Victor Company of Japan Ltd.
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