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close lines after edge detection

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Elad
Elad am 28 Mai 2012
Hi all, After edge detection and adding some circular object, I like to close the lines and fill each area. this is an example : http://i48.tinypic.com/35hq0cg.jpg
is there a way to close the lines without dilation or morfological operations? those would modify the accuracy of the detection.
  2 Kommentare
Stephen
Stephen am 29 Mai 2012
what was the original image?
Elad
Elad am 30 Mai 2012
Its fungi on a leaf , but this image is after a few manipulations allready.

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Antworten (2)

Image Analyst
Image Analyst am 28 Mai 2012
Other options would be convex hull or restricted convex hull, or Sean's shrink wrap: http://www.mathworks.com/matlabcentral/fileexchange/29175-shrinkwrap
  4 Kommentare
Image Analyst
Image Analyst am 10 Aug. 2019
Using a convex hull may not always be a good choice - it won't give the right shape in some situations. For a banana shape, it convex hull would give a D-shape. One must really look at the image and not just make blanket generalizations.
Stelios Fanourakis
Stelios Fanourakis am 21 Aug. 2019
Image Analyst. I want to apply convex hull to a closed contour shape. Thus, the convex hull shape is more or less defined when applied to a closed contour. Isn't it?

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Walter Roberson
Walter Roberson am 28 Mai 2012
imfill( YourBWArray, 'holes' )
  3 Kommentare
Walter Roberson
Walter Roberson am 28 Mai 2012
The example where the line leaves a gap: where should it attach to the main body? If the "accuracy of the detection" is an issue, every choice is wrong, unless there is external information available.
Elad
Elad am 29 Mai 2012
Yes, you are right , I guess I would like to complete the closing in a circular way.
I found this answer that works sometimes, if the gap is small:
http://www.mathworks.com/matlabcentral/answers/23467-filling-the-objects-found-by-canny-edge

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