Monotone spline regression for accurate MTF measurement at low frequencies.

Abstract

The modulation transfer function (MTF) of radiographic systems is frequently evaluated by the system's line spread function (LSF) using narrow slits. The conventional slit method requires LSF tail approximation, which is achieved by exponentially extrapolating the LSF tails beyond 1% of peak value. However, the estimated MTF at low frequencies from… (More)
DOI: 10.1364/OE.22.022446

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