Color space conversion is an important kernel in multimedia codecs such as JPEG and MPEG. When implemented using SIMD instructions, however, the performance improvement is often limited due to two reasons. First, corresponding color space components operation. It has been reported that it consumes up to 40 of the processing time of a highly optimized decoder [3, 2]. Consequently, the performance of JPEG/MPEG coders/decoders (codecs) can be improved

imagepro.cpp

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