bwlabel doesn't find a blob

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parinaz nazeri
parinaz nazeri on 22 Jan 2020
Commented: parinaz nazeri on 24 Jan 2020
Hi all,
I have an image which I applied filtering on it and eneded up with the image on the right. I use bwboundaries and bwlabel to obtain the boundaries and blobs in this figure.
I clearly see that boundary #6 can correspond to a blob but bwlabel doesn't find this blob and shows the total number of lobs in this image as 5 instead of 6. Can somebody help please?
Thanks
untitled.jpg
Capture.PNG

Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 22 Jan 2020
Edited: KALYAN ACHARJYA on 22 Jan 2020
Yes, total number of blobs in this image is 5 (in context of 8-connected objects)
L=bwlabel(BW) returns the label matrix L that contains labels for the 8-connected objects found in BW.
By default 8 connected (you can choose 4 connected also)
89.png
  5 Comments
parinaz nazeri
parinaz nazeri on 24 Jan 2020
Thanks! Yes, I used the inverted image and it worked fine!

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