how can i find dent in structure?

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vijendra sn
vijendra sn on 12 Aug 2014
Commented: vijendra sn on 12 Aug 2014
I = imread('diodo.jpg');
I = rgb2gray(I);
% f=figure,imshow(I); % g=figure,imshow(J);
hy = fspecial('sobel'); hx = hy'; Iy = imfilter(double(I), hy, 'replicate'); Ix = imfilter(double(I), hx, 'replicate');
gradmag = sqrt(Ix.^2 + Iy.^2);
K=figure,imshow(gradmag,[]); set(K, 'visible','on'); filename = 'temp_file.jpg' saveas(K, filename)
i1 = imread(filename) delete(filename)
[x, y, rgb] = ind2sub([size(i1,1) size(i1,2) size(i1,3)], find(i1 ~= 255)); A = i1(min(x):max(x)-1,min(y):max(y)-1,:);
A = rgb2gray(A)
I = edge(A,'sobel')
%934 742 I = imcrop(I,[10 7 914 728]); I = imresize(I, [2000 2500])
f=figure,imshow(I); set(f, 'visible','on');
imwrite(I, filename) bw = imread(filename) delete(filename) bw = im2bw(bw, graythresh(bw)) bw = bwareaopen(bw,65); set(f, 'visible','on'); f, imshow(bw)
But i don't need to find depth of the image just i need to find dent in the image
  1 Comment
vijendra sn
vijendra sn on 12 Aug 2014
i have used this code for dent detection on structure and for images i can find dent but not for all
i have attached image which i cannot find dent (DSC_img0976.jpg)
but i find dent on these images (img18.jpg) pls help on this

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