Image enhancement using LabVIEW

I'm trying to make a program to enhance an image in labview.I have already program in matlab codes.But its some inbuild functions are not working in labview since it is not present in labview mathscript module.The algorithm used to enhance the image is written below 1.input image in RGB 2.Contrast stretching of the model 3.RGB to HSI 4.contrast stretching of S&I 5.display the RGB image So please help to implement this algorithm in labview .Please I'm a beginner in labview