Measuring indentation in an object

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subrajeet
subrajeet 2013-1-9
Dear Researchers,
How can I we measure how many indentation or foldings are present in the three objects presented below
http://s20.postimage.org/s1zoc1r8t/indent.png
Subrajeet

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回答（2 个）

Image Analyst
Image Analyst 2013-1-9
Use the convex hull, bwconvhull(). Subtract the original image from the convex hull and call bwlabel
indentsBinaryImage = bwconvhull(binaryImage) - binaryImage;
[labeledImage, numberOfIndents] = bwlabel(indentsBinaryImage);
Amith Kamath
Amith Kamath 2013-1-9
http://blogs.mathworks.com/steve/2011/10/04/binary-image-convex-hull-algorithm-notes/ and the convex hull concept would help. I suppose you need to isolate each blob using http://www.mathworks.com/help/images/ref/bwconncomp.html and then find it's convex hull, and then the number of black blobs inside the convex hull will give you the number of folds. Hope this helps!

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