In imaging, rotation refers to the act of tilting an image a certain number of degrees. On digital imaging systems, images can be rotated to fit them into predetermined designs or frames. Rotation is also often performed to fix images that were not scanned straight. Rotation, however, is often extremely time-consuming and—when not done in increments of 90º—degrades image quality. It is often more expedient to rescan the image at the correct angle.
In computer modeling, the turning of a modeled or rendered object about an axis.