A lack of sharpness in an image. Unintentional blur often the result of improper focus, camera shake or motion at slow shutter speed. Elements in a photograph can also be blurred for artistic effect by using the above techniques intentionally, by tracking a moving subject against its background, or by adjusting the cameraâ€™s aperture setting to decrease depth of field. See also APERTURE, DEPTH OF FIELD.
Unsharpness because of the movement of the camera or subject during exposure. Blur can be used for many creative effects. In computer imaging, the use of Blur controls to selectively soften parts of the image.
a filter which averages together pixels to minimize subtle frame-to-frame differences. Normally, you will get better results with the Adaptive Noise Reduction filter.