image - bwlabel doesn't work as expected? -


this segmented image of brain thresholding segmentation, want a, b, , c regions, brain regions.

when apply kind of operation. now, using bwlabel find blob areas , correspondingly extract bigger or circular blobs of kind , blobs a, b,and c. problem when bwlabel don't a, b blobs.

here code , attached images before , after bwlabel:

    temp = before_dicomfiles{1,15};     %figure, imshow(temp, [low1 high1]);     temp = double(temp);      newimg = temp; % actual brain image used thresholding     newimg(newimg <0 )  = 0; % set negative pixels zeros     newimg(newimg >1080) = 0; % remove on range     figure, imshow(newimg, [low1 high1]); % thresholded image     bw = bwlabel(newimg,8) ;     figure, imshow(bw, [])  % labelled image missing a, blob areas

enter image description here

enter image description here

suggest me methods trace regions a, b , better segmentation methods not miss brain regions

thanks, gopi


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