SQF

subjective quality factor
エスキューエフ. 主要品質要素. 双眼鏡などのシャープさを表現するためにもちいる数字.
subjective quality factor; a method of relating MTF(modulation transfer function) to the perception with sharpness in design of visual imaging systems; used to quantify the sharpness of a visual system such a

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