A general term used for a device which corrects problems on a video or a graphic image. A narrower definition is a machine which restores high frequency losses by enhancing the high frequency region of the video/graphics spectrum. An enhancer often has controls such as Sharpness, Definition, Detail, etc., which are used for high frequency boosting. Unfortunately, there is sometimes a tendency for analog enhancers to introduce snow while adjusting the high frequency region of the spectrum. Image enhancing is done in the digital and graphics domains as well, usually using different technologies, albeit with the same purpose and uses as the analog video enhancer.
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