how to remove the tiny white pixels around the rectangles

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How can i remove the tiny pixels around the rectangles in the image attached. attached images.

Accepted Answer

Kevin Holly
Kevin Holly on 29 Sep 2022
Img = imread('originalImage.png');
imshow(Img)
You can also filter based on area of objects
Img = bwareafilt(imbinarize(Img),4,'largest'); % keep the 4 largest objects
imshow(Img)
  1 Comment
Pravindkumaran Baskaran
Pravindkumaran Baskaran on 29 Sep 2022
i got till the second image but i'm trying to get those dots around the boxes away

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More Answers (2)

Matt J
Matt J on 29 Sep 2022
Edited: Matt J on 29 Sep 2022
imopen(yourImage,ones(3))

Image Analyst
Image Analyst on 29 Sep 2022
Depends on exactly what that means.
  1. Do you want to simply remove small blobs?
  2. Or do you also want to remove a small protrusion that is sticking out of the side of a much larger rectangle.
For case 1 you can use bwareaopen or bwareafilt
For case 2 you might try imopen, though be careful for changes to the shape you don't want, especially near the corners or protruding blobs.

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