how to crop bigger size of blob in binary image and count its pixel .

[Rahul punk]

the size of images all time change so not a constant image size.

thank you!

Answer 1

[Image Analyst]

Not sure what you mean. You can use imcrop() if you want. You can also find the bounding boxes if you want:

props = regionprops(binaryImage, 'BoundingBox');

To crop out each one individually, do this

for k = 1 : length(props)
    thisBB = props(k).BoundingBox;
    subImage = imcrop(binaryImage, thisBB);
    figure;
    imshow(subImage);
end

This is done in my Image Processing Tutorial

[Rahul punk]

thanks for giving response but ,i have only crop bigger blob in the above image and count its pixel...

[Image Analyst]

Use bwareafilt()

biggestBlob = bwareafilt(binaryImage, 1); % Extract largest blob ONLY
areaOfBiggestBlob = nnz(biggestBlob) % Get its area

[Rahul punk]

its very easy thanks image analysis