Pixel stands for picture element. It corresponds to the smallest thing or single point that can be drawn on a computer screen. Every computer graphic is made up of a grid of pixels. When these pixels are painted onto the screen, they form an image. This grid of pixels is called a bitmap.
Resolution Refers to the sharpness and clarity of an image.
RGB Red Green Blue. System used for representing colors on computer monitors. Scanner Device that translates non-electronic material into digital computer images. The resulting matrix of bits, called a bit map, can then be stored in a file, displayed on a screen, and manipulated by programs. Scaling Re-sizing images to fit your layout.