how can do process on some objects in an image?

hi everybody I have a homework that I could not solve this.I hope you can help me. I have a binary image that includes some objects. I want to do some process on these object distinc..I thought maybe regionprobs can help me...Is there any idea? for example if this is my image I want to do my process(for example imdilate) on just 3 blob of this objects.

this Image is from result of this link: http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial

thanks

[chef13]

It is not clear to me what do you want to do.

Do you want to count the objects in the image? Do you want their size ? Or something else.

Could you be more precise?

[jack nn]

I mean that I want to do my process on each blob Separately...for example in this image I have 10 blob so I want to do my process like below:

if true
  for i=1:10
  do_process(blob(i))
   end
end
I hope this is clear...thanks dear

[chef13]

Start by identifying the number of blobs. Are you already able to do that?

[jack nn]

I searched and I know this:

if true
 [labeledImage, numberOfBlobs] = bwlabel(binaryImage);
end

but when I want to see for example first blob and I used this code:

if true
figure,imshow(labeledImage(1));
end

I couldn't see the first blob :(

[jack nn]

thanks dear I found the answer.

this is the answer:

if true
  [labeledImage, ~] = bwlabel(binaryImage);
blobMeasurements = regionprops(labeledImage,'all');
numberOfBlobs = size(blobMeasurements, 1);

 for i=1: numberOfBlobs
thisBlobsPixels = blobMeasurements(i).PixelIdxList;
m=zeros(512);
m(thisBlobsPixels)=1;
  end