Can anyone tell me how to extract and crop the roi based on its gray level profile?
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I have taken up following steps after detection of a refernce axis using hough lines.. detected the profile (using improfile function) stored the x, y coordinates in arrays vth corresponding value of intensity profile for each co-ordinate pair using a for loop.
now i want to extract the regions having regional maxima-minima-maxima in gray level profile. then i want to crop the extracted roi. I am a new to image processing so kindly guide step by step.
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Image Analyst
2013-1-11
Try imregionalmax() and imregionalmin(). See my image segmentation tutorial to learn how to find objects based on their intensity and crop them into new sub-images.
If you want to identify stretches of your 1D intensity profile vector obtained from improfile(), you can use thresholding:
aboveThreshold = yourProfileArray > someThresholdValue;
Not sure why you'd want to extract stretches of that 1D vector into individual short vectors, but if you tell me why, I'll tell you how to do it, or tell you how to do what you want to do without doing extracting sub-lines.
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Image Analyst
2013-1-18
It would have been best if you had posted these images at the beginning (please do so next time so we don't waste 7 days in getting you an answer). You need to use watershed segmentation. See these for help:
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