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Display motion blur, also called ''HDTV blur'' and ''LCD motion blur'', is a set of several different artifacts that is frequently found on modern consumer high-definition television sets and flat panel displays for computers. ==Causes== Many motion blur factors have existed for a long time in film and video (e.g. slow camera shutter speed). The emergence of digital video, and HDTV display technologies, introduced many additional factors that now contribute to motion blur. The following factors are generally the primary or secondary causes of perceived motion blur in video. In many cases, multiple factors can occur at the same time within the entire chain, from the original media or broadcast, all the way to the receiver end. * Pixel response time on LCD displays (motion blur caused by slow pixel response time) * Lower camera shutter speeds common in Hollywood production films (blur in the content of the film), and common in miniaturized camera sensors that require more light. * Blur from eye tracking fast moving objects on sample-and-hold LCD, plasma, or microdisplay.〔(Charles Poynton is an authority on artifacts related to HDTV, and discusses motion artifacts succinctly and specifically )〕〔(Eye-tracking based motion blur on LCD )〕 * Resolution resampling (blur due to resizing image to fit the native resolution of the HDTV); not a motion blur. * Deinterlacing by the display, and telecine processing by studios. These processes can soften images, and/or introduce motion-speed irregularities. * Compression artifacts, present in digital video streams, can contribute additional blur during fast motion. Motion blur has been a more severe problem for LCD displays, due to their sample-and-hold nature.〔(Perceptually-motivated Real-time Temporal Upsampling of 3D Content for High-refresh-rate Displays )〕 Even in situations when pixel response time is very short, motion blur remains a problem because their pixels remain lit, unlike CRT phosphors that merely flash briefly. Reducing the time an LCD pixel is lit, can be accomplished via turning off the backlight for part of a refresh.〔(Publishing from February 2006 from Sharp discussing LED flashing to reduce temporal retinal blur effects with decreasing on-time duty cycle for the backlight. )〕 This reduces motion blur due to eye tracking by decreasing the time the backlight is on. In addition, strobed backlights can also be combined together with motion interpolation to reduce eye-tracking based motion blur.〔(PDF describing MPRT )〕〔http://scien.stanford.edu/pages/labsite/2010/psych221/projects/2010/LievenVerslegers/LCD_Motion_Blur_Lieven_Verslegers.htm〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Display motion blur」の詳細全文を読む スポンサード リンク
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