How to extract a particular blob from an image consisting of number of blobs. In the figure below, i need to separately show the first ellipse in an image window.

I know the image i have attached contains 13 blobs and i need to show image of (say 4th blob) alone in a separate image window. How is it possible to do so. Please explain with a script.

Answer 1

[Image Analyst]

You could try bwselect() if you know the location. Otherwise you can label and use ismember

% Assign each blob an ID label.
labeledImage = bwlabel(binaryImage);
% Extract the 4th blob into it's own binary image.
binaryImage4 = ismember(labeledImage, 4) > 0;

[Sreejath S]

Thanks from bottom of my heart!!

[Sreejath S]

if true
  for i=1:numberOfBlobsred
   binaryImagei = ismember(labeledImagered, i) > 0;
   imshow(binaryImagei);
   end
end

This code doesn't work. i need to display some blobs in a for loop. The above script only shows the last blob. please help.

[Sreejath S]

Sorry, I figured it out....I was not using figure; So the images get plotted on the same figure!!!...Thank you