DCT.zip_The Image_quality checking

clc; clear all; close all; o=imread('2.jpg'); w = size (o,2); samplesHalf=floor(w/2); ci2=[]; for k=1:3% all color layers: RGB for i=1:size(o, 1)% all rows rowDCT=dct(double(o(i,:,k))); ci2(i,:,k)= idct(rowDCT(1:samplesHalf), w); end end h=size(o, 1); samplesHalf=floor(h/2); ci2f = []; for k=1:3% all color layers: RGB for i=1:size(o, 2)% all columns columnDCT2=dct(double(ci2(:,i,k))); ci2f(:,i,k) = idct(columnDCT2(1:samplesHalf), h); end end figure(), imshow(uint8(o)), title('Original Image'); figure(), imshow(uint8(ci2f)), title('Compression Factor 2 * 2'); imwrite(uint8(ci2f),'compressed.jpg','jpg');