Performance bound of Walsh-Hadamard transform for feature selection and compression and some related fast algorithms |
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| Authors: | P.C Mali B.B Chaudhuri D Dutta Majumder |
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| Affiliation: | Electronics and Communication Science Unit, Indian Statistical Institute, Calculatta 700035, India |
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| Abstract: | A fast algorithm of finding the diagonal elements of the covariance matrix of the two-dimensional Walsh-Hadamard (WH) transform of data is described. Its usefulness and other interesting properties of the WH transform are discussed. The performance of the WH transform is compared with the Karhunen-Loeve transform for a first-order stationary Markov process. |
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| Keywords: | Walsh-Hadamard transform image processing fast algorithm performance bound diagonal filtering |
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