This operation produces an LUT in which all pixels below the user specified lower level appear black, all pixels between the user specified lower level and the user specified upper level inclusively appear grey and all pixels above the user specified upper level appear white.

 

function call:

[out_img1]=vsg('TripleThresh',in_img1,low_th,high_th);

 

Arguments:

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

low_th – an integer or double specifying the lower threshold for the triple threshold function.

high_th – an integer or double specifying the higher threshold for the triple threshold function.

 

Description:

out_img1 – An image which has dimensions the same as the input image. Values between BLACK and the user defined integer value lower are set to BLACK (0). Values between the user defined integer value upper and WHITE (255) are set to WHITE. Otherwise the pixel is set to MIDGREY (midway between the minimum and maximum grey level).

 

 

 

Example:

img = openimage('crown.jpg');

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

[out_img1]=vsg('TripleThresh',img,50,200);

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

 

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