Count Object on color

Hello , I just use threshold app to isolate object with same color. However , i try use bwlabel to count object from result but it does not count . Can you help me ? Thank you.

Answer 1

[Image Analyst]

Call it then call bwlabel():

[BW,maskedRGBImage] = createMask(RGB);
[labeledImage, regionCount] = bwlabel(BW);

regionCount is the count of the colored objects you masked out.

[hanis nadhirah]

>> [BW,maskedRGBImage] = createMask(RGB);
[labeledImage, regionCount] = bwlabel(BW);
>> regionCount

regionCount =

     1

This is the result after I try your suggestion. Still cannot count the object , should be regionCount =13

or i use in wrong way?

[Image Analyst]

The code is correct. It must be that your mask is not appropriate for the image. Put back the original image so I can test it.

[hanis nadhirah]

already got it . Got some noise in the BW , i use imopen and imclose to get rid of it. Thank you.

[Image Analyst]

Thanks for accepting the answer. You might also use bwareafilt() or bwareaopen() to remove noise while leaving the shape of the other blobs unchanged. imopen() and imclose() will change the shape of blobs, which may or may not be acceptable to you. imclose() will tend to make blobs rounder/smoother while imopen() tends to make blobs pointier.

[hanis nadhirah]

Thank you for your help , I using bwareafilt() to remove noise and it works!