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how can i remove object bigger than x pixel

조회 수: 12 (최근 30일)
Lukasz Jarod
Lukasz Jarod 2014년 12월 18일
댓글: Ankit Sahay 2020년 5월 8일
i know that bwareaopen remove small elements , but how can i remove object bigger than x pixels???
i want to just the letter to stay so how can i remove that 2 big objects???

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Sven
Sven 2014년 12월 18일
편집: Sven 2014년 12월 18일
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.
  댓글 수: 2
Image Analyst
Image Analyst 2014년 12월 20일
Lukasz's Flag removed and moved here as a comment:
Yes, it helped me.
Ankit Sahay
Ankit Sahay 2020년 5월 8일
What does the second line do? The line where you have written:
BW = I>80;

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William Kemp
William Kemp 2017년 8월 1일
Its a little more compact if you use the built in function for it:
BW2 = bwpropfilt(BW,'Area',[0 x_pixels])
Where x_pixels is the maximum desired number of pixels in a BW object

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