image processing - testing blobs individually in matlab -

i have image contain many blobs . problem how test each blob individually masking on original image?! tried code did not know how complete it

labelledimage = bwconncomp(segmentedimage);              stats = regionprops(labelledimage, 'all'); centroids = cat(1, stats.centroid); [row ,col] = size(centroids); = 1 : row      areamatr(i) = stats(i).area; % gives area each blob in image     % have put here testing blob , masking out on     % original image? help? end 

it may more prudent use bwlabel instead, assigns unique id each unique blob in image. first output gives labelling , second output gives total number of unique ids / blobs in image. bear in mind image needs binary, given choice of variable name, i'm assuming true.

once find unique ids, can loop through each unique id, mask out blob , apply regionprops blob.

something this:

%// apply bwlabel image [labelledimage, numlabels] = bwlabel(segmentedimage);   %// each label... idx = 1 : numlabels      %// create mask particular blob     mask = labelledimage == idx;      %// apply regionprops on mask     stats = regionprops(mask, 'all');      %// use stats , mask in way see fit     %// ...     %// ... end