image processing step by step

Hi, i am a beginner for matlab. need all to help me in using matlab. i use matlab for my project. i'm doing a image processing. Now im in phase my project (preprocessing), what is the first step? hair removal first or change image to grayscale first? after that made a hair removal? in matlab any coding for hair removal?

[Naja Najah]

Did you find the code for hair removal !! I need it for my project