Help remove unconnected small pixel from image

Hello, maybe this question have been ask from other people, but i not fully understand how this code work. when i combine with my code it appear "index exceeds the number of array element" . can u help fix my code and help me understand the function

Answer 1

[Uday Pradhan]

Hi,

I found the mistake at line 132 of the code you have attached. If you notice, grayImage is already a binary image so thresholding it this way, will lead to binaryImage being a logical array with only zeros, hence the error.

% Threshold the image to binarize it.
binaryImage = grayImage > 100;

I believe you can just take:

% Threshold the image to binarize it.
binaryImage = grayImage ;

and then run the code to get the largest extracted blob. I hope this helps!

[MOHAMMAD AZRUL AIMAN]

thank you so much!

Answer 2

[Image Analyst]

You can now use bwareafilt instead of that ExtractNLargestBlobs() function I wrote (before bwareafilt was available) that you are using.

largestBlob = bwareafilt(binaryImage, 1); % Take largest blob only.