Adobe Photoshop is the industry’s leading graphics editing application designed by Adobe. To be more specific it is designed to work with raster graphics─meaning an image made up of pixels. It was first developed by Thomas Knoll and his brother John Knoll in 1987 and then they decided to sell it to Adobe Systems Incorporated in 1988. Although Photoshop may sound like an image editing application it doesn’t understand an image or the content of the image. In fact, primarily it was implemented on grayscale values of an image. It is a pixel editing application. All it understands is the numerical values associated with those pixels. It manipulates pixels, enhances them, or generates them from scratch.