Opening operation (user specify connectivity of the structured element 4 or 8).

 

function call:

[out_img1]=vsg('Open',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 morphological operations should be carried out.

 

Description:

Opening is a combination of erosion and dilation operations that have the effect of removing isolated spots in the image set A (in_img1) that are smaller than the structuring element B and those sections of the image set A narrower than B.

out_img1 – An image which has dimensions the same as the input image. This is the result of successive morphological erosion and dilation of the input image.

 

Example:

img = openimage('crown.jpg');

h=figure;image(uint8(img));set(h,'Name','Input image');

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

h=figure;image(uint8(out_img1));set(h,'Name','Threshold');

[out_img2]=vsg('Open',out_img1,8);

[out_img3]=vsg('Open',img,8);

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

h=figure;image(uint8(out_img3));set(h,'Name','Open - grey scale image');

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