ual-Tree Complex Wavelet Transform Pack - version 4.3 Nick Kingsbury, Cambridge University, June 2003. This pack (version 4.2) includes the following functions for performing the Dual Tree Complex wavelet Transform on 1-D and 2-D signals-

小波图像去噪程序。th=sigma*sqrt(2*log10(L*T)) 计算阈值 ch=c(1,num(4-i,1):num(4-i,3)+step(4-i)-1) 对各高频系数进行阈值处理 chl=length(ch) for j=1:chl if abs(ch(j))>=th ch(j)=sign(ch(j))*(abs(ch(j))-2*th/(1+exp(m*(ch(j)^2)))) 阈值处理函数 else -Wavelet image denois

【谷速软件】matlab源码-符号函数，求解函数的极限 源程序 可以作为参考使用学习 -[Valley] matlab source software speed- sign function, solving the limit function can be used as a reference source to learn