...In other words, the phase also changes. In this case, the change in contrast and phase is displayed as a function of spatial frequency (the frequency of the sine wave chart) in OTF, with the former being distinguished as MTF (short for modulation transfer function) and the latter as PTF (short for phase transfer function). In Japan, the term response function was used for a time, but it is now internationally unified as OTF. *Some of the terminology that mentions "modulation transfer function" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…すなわち位相も変化する。この場合のコントラストおよび位相の変化を空間周波数(正弦波状のチャートの周波数)の関数として表示したのがOTFで,とくに前者をMTF(modulation transfer functionの略),後者をPTF(phase transfer functionの略)と区別する。日本では一時期,用語としてレスポンス関数が用いられたが,現在では国際的にOTFに統一されている。… ※「modulation transfer function」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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