ErosionNxN

Erosion operation with a user defined NxN structuring element.

 

function call:

[out_img1]=vsg('ErosionNxN',in_img1,conv_arr);

 

Arguments:

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

conv_arr – an integer array specifying the mask with which the input image will be eroded.

 

Description:

Erosion is equivalent to the shrinking of the image set A (in_img1) by a SE 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);

array = ones(5,5);

[out_img2]=vsg('ErosionNxN',out_img1,array);

[out_img3]=vsg('ErosionNxN',img,array);

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');
 

Notes:

1. For DICOM images, the function operates on all slices separately.

2. For RGB images, the function operates on all colour planes separately.

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