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Absolute Category Rating (ACR) is a test method used in quality tests.〔(P.910 : Subjective video quality assessment methods for multimedia applications ). ''ITU-T Recommendation'', approved in 1999-09. Retrieved on 2008-05-29.〕 The levels of the scale are, sorted by quality in decreasing order: * Excellent * Good * Fair * Poor * Bad In this method, a single test condition (generally an image or a video sequence) is presented to the viewers once only. They should then give a quality rating on an ACR scale. Test conditions should be presented in a random order per test person. The ACR scale is evaluated based on numbers that are assigned to the individual items, where ''Excellent'' equals to 5 and ''Bad'' equals to 1. The average numeric score over all experiment participants, for each test condition that was shown, is called the Mean Opinion Score. == See also == * Subjective video quality 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「Absolute Category Rating」の詳細全文を読む スポンサード リンク
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