ABSTRACT
An image is a spatial representation of an object, a two-dimensional or three-dimensional scene, or another image. It can be real or virtual as in optics. In computer vision, “image” usually means recorded image such as a video image, digital image, or picture. It may be abstractly thought of as a continuous function I of two variables defined on some bounded and usually rectangular region of a plane. A video image is an image in electronic signal format capable of being displayed on a cathode ray tube screen or monitor. The video signal can be generated from devices like a CCD camera, a vidicon, a flying spot scanner, a tactile sensor, a range sensor, or a frame buffer driving a digital to analog converter.
