luminance ratio
121Video scaler — A video scaler is a device for converting video signals from one size or resolution to another: usually upscaling or upconverting a video signal from a low resolution (e.g. standard definition) to one of higher resolution (e.g. high definition… …
122Histogram equalization — is a method in image processing of contrast adjustment using the image s histogram.OverviewThis method usually increases the local contrast of many images, especially when the usable data of the image is represented by close contrast values.… …
123Apollo TV camera — TV cameras used on the Apollo missions (and later Apollo Soyuz Test Project and Skylab missions) varied in design, with image quality improving significantly with each design. A camera was carried in the Apollo Command Module. For each lunar… …
124Image processing engine — The image processing engine, or image processor, is an important component of a digital camera and plays a vital role in creating the digital image.The image processing engine must perform a complex range of tasks.The photodiodes employed in an… …
125Rec. 709 — ITU R Recommendation BT.709, more commonly know by the abbreviations Rec. 709 or BT.709, standardizes the format of High definition television, having 16:9 (widescreen) aspect ratio. Technical detailsPixel countRec. 709 refers to HDTV systems… …
126Conoscopy — (from Ancient Greek κῶνος (konos) cone, spinning top, pine cone and σκοπέω (skopeo) examine, inspect, look to or into, consider ) is an optical technique to make observations of a transparent specimen in a cone of converging rays of light. The… …
127Minimum resolvable contrast — The 1951 USAF Tri bar Resolution Test Target is a classic example of a three bar target for the MRC test. The target is typically illuminated by an integrating sphere irradiating in the visible spectrum. Minimum resolvable contrast (MRC) is a… …
128High Definition Television — [haɪ ˌdɛfɪˈnɪʃən ˈtɛlɪvɪʒən] (HDTV, engl. für hochauflösendes Fernsehen) ist ein Sammelbegriff, der eine Reihe von Fernsehnormen bezeichnet, die sich gegenüber dem Standard Definition Television (SDTV) durch eine erhöhte vertikale, horizontale… …
