adjust.m

Index to gray conversion in matlab

passage = imread('passage.jpg');        % read the image

% adjust the contrast according to different slopes
adjusted =  imadjust(passage,  [0.1 ; 0.3],[0.2 ; 0.4]);
adjusted1 = imadjust (passage, [0.3 ; 0.5],[0.4 ; 0.6]);
adjusted2 = imadjust (passage, [0.2 ; 0.3],[0.3 ; 0.5]);
adjusted3 = imadjust (passage, [0.1 ; 0.6],[0.3 ; 0.8]);


imshow(passage);        % show original Image
figure, imshow(adjusted); title('[0.1 ; 0.3],[0.2 ; 0.4] ');    %show adjusted images
figure, imshow(adjusted1); title('[0.3 ; 0.5],[0.4 ; 0.6]');
figure, imshow(adjusted2); title('[0.2 ; 0.3],[0.3 ; 0.5] ');
figure, imshow(adjusted3); title('[0.1 ; 0.6],[0.3 ; 0.8]');