Title :
Probability density functions for Hadamard coefficients in transformed television pictures
Author :
Ghanbari, Milad ; Pearson, D.E.
Author_Institution :
University of Essex, Department of Electrical Engineering Science, Colchester, UK
Abstract :
The distributions of Hadamard coefficient for blocks of size 8 × 1 picture elements in six 625-line television pictures were obtained. The data were well approximated by gamma distributions. Low-sequency components were best fitted by choosing ¿(n) with n in the range 1/2¿2/3, and high-sequency components by n = 1 (equivalent to the negative exponential distribution).
Keywords :
probability; video signals; Hadamard coefficients; gamma distributions; probability density functions; transformed television pictures; video signals;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780172
