MATLAB: How can i remove object bigger than x pixel

Question

i know that bwareaopen remove small elements , but how can i remove object bigger than x pixels???

http://www.image-share.com/ijpg-2791-262.html

i want to just the letter to stay so how can i remove that 2 big objects???

Answer 1

Hi Lukasz,

Here's an example that removes all objects greater than 1000 pixels in area. You probably have your own BW image and your own threshold that you can use in a similar way.

I = imread('rice.png');
BW = I>80;
cc = bwconncomp(BW);
stats = regionprops(cc);
threshold = 1000;
removeMask = [stats.Area]>threshold;
BW(cat(1,cc.PixelIdxList{removeMask})) = false;

Did this help you out?

Thanks, Sven.