1. The problem statement, all variables and given/known data I am doing a project on mathematical analysis of image restoration techniques, using linear restoration filters such as 1.inverse filter 2.pseudo inverse filter 3.weiner filter and 4.constrained least square filter 2. Relevant equations 3. The attempt at a solution For the pseudo inverse filter, I've programmed as following: clc; clear all; close all; f=imread('C:\Documents and Settings\Jerin\Desktop\lenna.gif'); PSF=fspecial('motion', 14,0); gb=imfilter(f,PSF); g=imnoise (gb,'gaussian',0,200/(255*255)); fr=deconvwnr (g,PSF); k=fft(fr); for i=1:1:150; H=pfilter('ideal',size(fr,1),size(fr,2),i); G=H.*k; g1=real(ifft2(G)); g1=g1(1:size(fr,1),1:size(fr,2)); e=double (f)-double(g1); [m,n]=size(e); rmse(i)=sqrt(sum(e(:).^2)/(m*n)); end; i=1:1:150; figure(2); plot(i,rmse(i)); Now i am getting an error like this: The output should be like this: If posssible, guys please copy the program and work it out in matlab for the correct output, i know you can sort it out very easily. Please its urgent. What filter i should use? is the pfilter correct? I got this programmed from a friend.