What is the method of matlab morphological expansion and corrosion?
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% enlarge the image to enlarge the shape
Use the imdilate function to extend the image
% morphological expansion operation expands or thickens foreground objects in an image
BW = zeros (9, 10)
BW (4JV 6pm 4R 7) = 1
Imshow (imresize (BW,40,'nearest'))
Create a structural element to use with imdilate
To expand a geometric object, you usually need to create a structural element that has the same shape as the object
SE = strel ('square',3)
Pass input images and structural elements to imdilate
Add 1 to all edges of the foreground object
BW2 = imdilate (BW,SE)
Imshow (imresize (BW2,40,'nearest'))
For comparison, create a structural element of a different shape
Expand the original image with new structural elements
SE2 = strel ('diamond',1)
BW3 = imdilate (BW,SE2)
Imshow (imresize (BW3,40,'nearest'))
Montage ({BW,BW2,BW3}, 'Size', [3 1])
%% corrodes the image to remove fine lines
% use the imerode function to corrupt the binary image
% image read and display image
BW1 = imread ('circbw.tif')
Imshow (BW1)
Create a diagonal structure element
SE = strel ('arbitrary',eye (7))
% corrosion image
BW2 = imerode (BW1,SE)
% display original image and corrosion image
The diagonal stripe is due to the shape of the structural element.
Imshow (BW2)
Montage ({BW1,BW2}, 'Size', [2 1])
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