3D segmentation using treshold method

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Gabriel Reynes 2016-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/267127-3d-segmentation-using-treshold-method

回答： Image Analyst 2016-2-8

I am triying to make a 3D segmentation using a treshold method. Given a 3D image I, in particulare slice of the image I(:,:,i) I performed a treshold segmentation and using region props I selected a specific ROI. What is the best way to propagate this roi to the other slices?

My idea was: given a slice I(:,:,i+/-1) I do the same treshold segemntation and for all ROIs I need to find if some pixels coincide with the ROI of the previous slice. Is there any simple way to do that?

Thanks is advance!

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Answer 1

Image Analyst 2016-2-8

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Just get the threshold from that particular slice, or however you do it. Then just create a binary 3D volumetric logical image by thresholding your entire image (the badly-named I):

binaryImage = I > threshold;

To find out if some pixels coincide for two slices, you can AND the slices

inBothSlices = I(:,:,slice1Index) & I(:,:,slice2Index);