How to count blobs with a given threshold in an image

Hi everyone, I need to count the number of blobs with a given threshold in an image? Can somebody please help me there.

Answer 1

[Akira Agata]

One possible solution would be like this:

% Read sample image
I = imread('coins.png');

% Threshold
th = 100;

% Blobs where I > th
BW = I > th;

% Count number of blobs
s = regionprops(BW);
numBlob = numel(s);

Result:

>> numBlob
numBlob =
  10

[Mamuna Anwar]

Thanks a lot, this was a great help

Answer 2

[Image Analyst]

See my Image Segmentation Tutorial: https://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862&sort=downloads_desc