"Stair-like lines that appear where there should be smooth straight lines or curves. Jaggies can occur for a variety of reasons, the most common being that the output device (display monitor or printer) does not have enough resolution to portray a smooth line. In addition, jaggies often occur when a bit-mapped image is converted to a different resolution. This is one of the advantages vector graphics has over bit-mapped graphics -- the output looks the same regardless of the resolution of the output device.?The effect of jaggies can be reduced somewhat by a graphics technique known as antialiasing. Antialiasing smoothes out jagged lines by surrounding the jaggies with shaded pixels. In addition, some printers can reduce jaggies with a technique known as smoothing.?The smaller the pixels and the greater their number, the less apparent the "jaggies". Also known as pixelization."

(Joint Photographic Expert Group) A compression algorithm for image files.

"A standard developed by JPEG for reduction in the amount of data required to represent an image and therefore the hard disk space needed to store it. The techniques involved in compression may result in loss of actual data, which may result in irregular rasterization of an image or granularity. JPEG compression is defined only for still-image compression, although a number of variants referred to as "motion JPEG" are used in digital videography."

The new JPEG compression standard that will be used in digital cameras and software starting in 2001. It will feature higher compression but will less image quality loss.