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Finally implemented perceptual brightness thing.
author samer
date Sun, 11 Oct 2015 10:20:42 +0100
parents db7f4afd27c5
children
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function A=spdiag(H)
% spdiag - Return elementwise multiplier as sparse diagonal matrix
%
% spdiag :: [[N]] -> [[N,N]].

A=diag(sparse(H));