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Chapter 12:
Lux Transfer
A lux transfer curve (LTC) is a powerful extension of PTC, whereas a PTC is generated with an uncalibrated light source, and a LTC utilizes an absolute light source. Therefore, LTC characterizes a camera system in absolute terms. For example, commercial camera sensitivity is often quoted in terms of “minimum detection limit” at an illumination level typically specified in units of lux. LTC will produce this figure-of-merit parameter in addition to other absolute performance parameters.
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