Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

how to count big cell only?

Asked by Moon Shadow on 10 Mar 2014
Latest activity Answered by Image Analyst on 25 Mar 2014

I have image with different cell size but I want Count the number of big cells only!!

I try this code:

A = imread ('cell.png');
numObjects = 26


Moon Shadow


No products are associated with this question.

2 Answers

Answer by Dishant Arora on 10 Mar 2014
Edited by Dishant Arora on 10 Mar 2014
Accepted answer

use bwareaopen to remove objects smaller than certain number of pixels.

 BW2 = bwareaopen(BW, thresh);
[~, numObjects] = bwlabel(BW2,4);


Moon Shadow on 21 Mar 2014

It did nit worked with me!!

It calculate small and big cells.

I = imread('cell.png'); EDU>> imshow(I); EDU>> bw = im2bw(I); EDU>> figure,imshow(bw);

EDU>> BW2 = bwareaopen(bw, 1000); EDU>> figure,imshow(BW2); [labeled,numObjects]=bwlabel(BW2,4) numObjects = 10

Dishant Arora on 25 Mar 2014

Check out for 8-connectivity when using bwlabel or attach your image.

Dishant Arora
Answer by Image Analyst on 25 Mar 2014

See my code to extract the largest blob, attached below in blue. In there, there is a general purpose function I wrote that can take the N largest or smallest blobs in a binary image.


Image Analyst

Contact us