How can I separate objects with one pixel connected after bwlabel
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Hi,
I am using bwlabel to label the objects with defined connectivity after edge detection algorithm. But sometimes I encountered the objects are connected with only one pixel. How could I efficiently separate them?
Below is one example of a binary image I want to detect objects. I chose connectivity 4 to detect the objects when using bwlabel
obj_label = bwlabel(BW, 4);
Actually these two are seperate objects that I want, but the one pixel between make them difficult to label when using bwlabel.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/974265/image.png)
Appriciate a lot if any suggestions are provided.
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DGM
il 22 Apr 2022
Depending on what the rest of the blobs look like, this may be one way.
% fix the image and return it to what I assume the original size was
[A,map,~] = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/974265/image.png');
A = rgb2gray(ind2rgb(A,map))>0.5;
A = imresize(A,[30 30],'nearest');
imshow(A)
% remove foreground pixels which have at least two
% unconnected BG pixels in their 8-neighborhood
B = ~bwmorph(~A,'bridge');
imshow(B)
Più risposte (2)
Image Analyst
il 23 Apr 2022
You could try imopen() or watershed().
For a thorough discussion, see Steve's blog:
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