Matlab image intensity level adjustment
I have a specific question to ask about the intensity adjustment for image processing. I need high constraint value to find small gaps in the image. I used a manual threshold value 0.99 to convert the grayscale image. However, as the illumination on the surface did not distribute evenly, some parts of the image is lost. I used adaptive method, however, the results is similar to a global threshold. Orignial picture:
Red point as intereted area:
Detail in Binary Image:
I0 = imread('1_2.jpg'); [R,C,K] = size(I0); if K==1 I1 = I0; else I1 = rgb2gray(I0); end
%Adjsut image to get a standar binary picture %Adjust image intensity value I1 = imadjust(I1,[0.1 0.7],[]); BW0 = im2bw(I1,0.99); figure; BW0 = bwareaopen(BW0,10000); %Fill non_crack hole error BW0 = bwareaopen(1-BW0,500); BW0 = 1-BW0; imshow(BW0);
After this process, only half of the image will be left. I want a whole image with local intensity threshold which can show the same feature as the high-level threshold. What can I do?
Thanks
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