Pixel-based graphics are commonly known as bitmap graphics or raster images. In order to understand pixel based graphics you have to understand the word pixel and its origin. The word pixel is basically a combination of two words “pix” and “el”. The first word “pix” came from the word picture and the other word “el” came from the word element. The pixel is the smallest element of a picture or the tiny dots of colors (red, green or blue). Bitmap or pixel-based images are made by the combination of these tiny dots on a lattice. The picture on a bitmap graphic is a blend of pixels. The biggest advantage of using pixel based graphics in your website is that all the digital and scanned picture are produced in this format and you don’t need to convert it into any other format.