raster image

Raster images or bitmap graphics (.bmp, .tif, .jpg) are created from a series of pixels to represent graphics. Each pixel in a bitmap image has a specific location and colour value assigned to it.

Bitmap images are resolution dependent – that is, they represent a fixed number of pixels. As a result, they can appear jagged and lose detail if they are scaled on-screen or if they are printed at a higher resolution than they were created for.