Image centroid in matlab

2011 6 23
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I have about 400 images I need to find its centroid in such a way that all other images have the same centroid in respect to the first image centroid (44.5 79.6). I was able to do it manually by calculating for each image as below.But it quite tedious doing it for 400 images. Please I need help/code that can execute the task.Thanks
Im1 = imread('image1.png');
[x,y] = ait_centroid(Im1);
Im01=uint16(Im1);
Im2 = imread('image2.png');
[x,y] = ait_centroid(Im2);
Im02=circshift(Im2, [-2 -4]); [x,y] = ait_centroid(Im02);
Im02=uint16(Im02);
Im3 = imread('image3.png'); [x,y] = ait_centroid(Im3); Im03=circshift(Im3, [-3 -5]); [x,y] = ait_centroid(Im03); Im03=uint16(Im03);

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回答（1 个）

Sean de Wolski
Sean de Wolski 2011-6-23

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You might want to read this:
FAQ4.6
and this:
FAQ4.12

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kiki
kiki 2011-6-23
Thanks for the links. I have come across them. I quite understand how looping works but question is based on how to write a program that can automatically center each image to say (44.5 79.5) by performing circshifts on each image (depending on their initial center) so that all matches the centroid of Im1.
Sean de Wolski
Sean de Wolski 2011-6-23
just subtract their centroid from im1's centroid to get your displacement vector. The translate with circshift or, if you have the IPT, my imtranslate:
http://www.mathworks.com/matlabcentral/fileexchange/27251-imtranslate

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kiki
kiki
2011-6-23

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