A mask is a black and white image of the same dimensions as the original image. It can be an essential way to edit and tweak photographs by image editing software. Masking can be two types; Layer masking and Vector/Alpha Channel masking. Layer masking is pixel related, it allows to obscure layer content or its part. And vector mask is created from paths and can be re-sized without damaging pixel information’s. Following images shows sample of of photo masking