Error with image analysis
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Hello!
I've been trying to get this script working, but I don't know how. What it should be able to do is make the image black and white and be able to pick out the centroid of the object in the image.
Image
Code
i = imread('343A #1.tif');
j = size(i);
imtool(i);
for k = 1:j(1)
for l = 1:j(2)
if i(k,l,1) > 160 & i(k,l,2) > 160
d(k,l) = 1;
else
d(k,l) = 0;
end
end
end
imtool(d);
label = bwlabel(d);
imagesc(label);
[label,num] = bwlabel(d,4);
stats = regionprops(label,'basic');
stats(1).Area
stats(1).Centroid
max_area = max([stats.Area]);
biggrain = find([stats.Area]== max_area);
stats(biggrain).Centroid
Error
??? Attempted to access i(2,51,2); index out of bounds because size(i)=[256,64,1].
Error in ==> TestingCentroid3 at 10 if i(k,l,1) > 160 & i(k,l,2) > 160
回答（2 个）
Sean de Wolski
2011-5-18
i is apparently a 2d image. what is j (size(i))?
d = I > 160; %don't name your variables i,j as they are the sqrt(-1)
Frank
2011-5-18
2 个评论
Sean de Wolski
2011-5-18
i(k,l,1) is the same location as i(k,l).
hence instead of both for-loops you could do
d = i>160;
Sean de Wolski
2011-5-18
And I'll repeat: Don't name your variables i,j!
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