SUSAN

Grey Scale (SUSAN) corner detector.

 

function call:

[out_img1]=vsg('Susan',in_img1,num1,num2);

 

Arguments:

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

num1 – an integer specifying the brightness threshold.

num2- - an integer specifying the geometric threshold.

 

Description:

This computationally efficient approach to the detection of gray scale corners is based on the application of a small circular mask to an image. As this mask is moved over the image in a raster scan fashion it examines the local information to determine the likelihood of a valid grey scale corner.

out_img1 - An image which has dimensions the same as the input image. The output image displays SUSAN corners of the input image.

 

Example:

img = openimage('crown.jpg');

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

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

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

[out_img1]=vsg('Susan',out_img1,100,10);

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

Notes:

1. For DICOM images, the function operates on each slice separately.

2. For RGB images, the function operates on each channel separately.

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