Stairlike 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
) 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.