Just a memo about the functions available in Matlab dedicated to image processing.
Filtering:
filter2 : add 'same' as an option to avoid the size transformation.
Create a selection:
im2bw : convert an image to a B&W image according to a threshold.
create a filter:
strel : Create a structural element. means to be used as a mask, see 'diamond', 'disk'.
edge : detect the edges of an image, to apply with a threshold.
Modify the selection:
imdilate
imerode
imclose : Which is basically a combinaison of imdilate and imerode
imopen : Opposite of imclose
imfill : Clean alternative of imclose
bwmorph : Lots of different operation available, included 'skel', 'bridge', ...
imcomplement : Inverse the values of the black and white in a image
Full list of the functions available in Matlab at: http://www.mathworks.com.au/help/images/morphological-filtering.html
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