Erosion operation (user specifies the connectivity of the structuring element - 4 or 8).

 

function call:

[out_img1]=vsg('Erosion',in_img1,connected);

 

Arguments:

in_img1 mask image, 3 channel RGB, 1 channel greyscale or binary image, or DICOM image.

connected – an integer specifying whether 4 or 8 connected erosion should be carried out.

 

Description:

Erosion is equivalent to the shrinking of the image set A (in_img1) by a structuring element B. This is a morphological transformation which combines two sets using vector subtraction of set elements. out_img1 – An image which has dimensions the same as the input image. This is an image which has been eroded.

 

Example:

img = openimage('crown.jpg');

[out_img1]=vsg('Threshold',img,100);

[out_img2]=vsg('Erosion',out_img1,4);

[out_img3]=vsg('Erosion',img,4);

h=figure;image(uint8(out_img2));set(h,'Name','Erosion - binary image');

h=figure;image(uint8(out_img3));set(h,'Name','Erosion - Grey scale image');

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