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IMAGE ENHANCEMENT

Image enhancement technology, such as a television camera, can be used for film radiography. This is a two-step process: getting the image on film, and enhancing it. Recent developments in which film is digitized result in obtaining more information from a single film. This, too, is at least a two-step process involving increased RTR. Image enhancement features in software can be used to improve the quality and therefore the usefulness of the image obtained. Image enhancement signifies that the original image is modified so that previously undetected information can be seen. In RTR, the enhancement is performed after viewing the image on the monitor. Much less time is spent producing the enhanced image than in film radiography. This is done usually to show low-contrast areas relating to cracks, boundaries, voids, inclusions, or part orientations. Low-contrast sensitivity and resolution are poorer in RTR than in film radiography.