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

 

function call:

[out_img1]=vsg('Close',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:

Closing is the dual morphological operation of opening. This transformation has the effect of filing in holes and blocking narrow valleys in the image set A, when a structuring element B is applied.

out_img1 – An image which has dimensions the same as the input image. This is the result of successive morphological dilation and erosion 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('Close',out_img1,8);

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

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

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

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