Chrominance resampling for color images
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United States of America Patent
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Jan 27, 1998
Grant Date -
N/A
app pub date -
Apr 25, 1996
filing date -
Apr 25, 1996
priority date (Note) -
Expired
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Abstract
Chrominance resampling for color images to produce an upsampled chrominance signal from a subsampled chrominance signal uses luminance to detect edges in the color image. The detection of edges produces an Index signal which is used to select a particular one of a plurality of lowpass filters for filtering a chrominance signal expanded from the subsampled chrominance signal. For interlaced video signals a field/frame decision is made based upon relative motion between the fields of each frame, which decision is input to the filter selection process. The resulting chrominance samples in the upsampled chrominance signal are offset to co-site the samples with the corresponding luminance samples at the output.
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