Major axis and minor axis
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How can I plot the major axis and minor axis for an object in an image?
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Image Analyst
le 10 Nov 2012
I've just added a section on "How do I create an ellipse" to the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_create_an_ellipse.3F so that might help you.
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Walter Roberson
le 27 Août 2012
regionprops() to get the centroid and orientation (angle). After that it becomes straight trig. The axes length is R, compute R*cos(theta), R*sin(theta), and center those displacements on the centroid.
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Image Analyst
le 9 Sep 2012
Pamela, I haven't heard of that method to determine similarity. Much more common is SSIM ( http://en.wikipedia.org/wiki/SSIM) and friends, or even PSNR. Or you can use image moments: http://en.wikipedia.org/wiki/Image_moment
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