How to ellipse fitting the object
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how to ellipse fitting the object?
2 Comments
Image Analyst
on 26 Mar 2013
Background: Leon has already seen Matt J's code for fitting an ellipse: http://www.mathworks.com/matlabcentral/answers/53525#answer_65140
Answers (1)
Image Analyst
on 26 Mar 2013
Edited: Image Analyst
on 26 Mar 2013
regionprops() can do that. It give the major axis, minor axis, and orientation for each blob in the image.
You may also want to see this paper: http://www.ecse.rpi.edu/homepages/qji/Papers/ellipse_det_icpr02.pdf
3 Comments
Image Analyst
on 7 Mar 2021
Edited: Image Analyst
on 7 Mar 2021
- regionprops() measures only the angle, centroid, and major and minor axis lengths. It does not give a full (x,y) equation.
- regionprops() can handle multiple blobs in an image. You can return the results in a structure array (the default) or a table (if you specify the 'table' input option).
- I don't know if it's possible to modify imfindcircles() to find ellipses. You can try to program up the attached paper if you want to find ellipses.
Also see this answer:
and my attached demo.
L
on 10 Mar 2021
Thank you.
Also, is it possible to use the imfindcircles() as an texture detector? Something like a Gabor filter, to highlight the curve-shaped textures?
I saw the paper that you have attached. But, what happens if the image is noisy? The method in the paper could be ssensitive in noise.
This is the reason I would try to detect the texutres first. Later, maybe the detection method would be combined with texture analysis.
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