A unified mathematical form of the Walsh-Hadamard transform for lossless image data compression


A unified mathematical form of the integer Walsh-Hadamard Transform (WHT) has been introduced for lossless image data compression, which is called the unified lossless WHT (ULWHT). The ULWHT extends the previous schemes that have been defined for only 2 2 × WHT. This allows a larger size WHT to be applied to the lossless pyramid structured coding. We show… (More)
DOI: 10.1016/S0165-1684(97)00138-2


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