What is a Pixel

A pixel is the smallest element of a picture on the screen. Its etymology comes from the word picture ("pix") and element (-el). It's the smallest component of any digital image. A picture resembles the original according to the number of pixels used to represent it. This number is often referred to as the resolution. Pixels are usually organized in a regular two-dimensional grid, which allows most operations to be implemented to each pixel. The number of bits per pixel (bpp) reflects the colors that can be represented by the pixel. Some systems can also feature subpixels or megapixels.