A format for storing high-quality color and grayscale photographs in bitmap form. JPEG files usually end in . JPEG files are RGB or grayscale mode and the best format for saving photographs to be used on the web, especially of people and ones with many colors. Images which have subtle shades are called grayscale images. A pixel is the smallest logical unit of visual information that can be used to build an image.
Pixels are the little squares that can be seen when a graphics image is enlarged.
The more pixels in an image, the better its resolution. Pixels are used as a unit of measure for graphics and monitors. The higher the resolution, the finer the image quality. Monitors display in a resolution of 72 DPI RGB - Red, Green, Blue. The three primary colors of light which, mixed together in various proportions, produce all the other colors.