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Small image denoising program featuring wavelet-based thresholding. Key algorithm steps include: th=sigma*sqrt(2*log10(L*T)) for threshold calculation, ch=c(1,num(4-i,1):num(4-i,3)+step(4-i)-1) for high-frequency coefficient extraction, and implementing threshold processing through ch(j)=sign(ch(j))*(abs(ch(j))-2*th/(1+exp(m*(ch(j)^2)))) using a custom soft-thresholding function with sigmoid modulation.

MATLAB 281 views Tagged