Practical edge-based modulation transfer function measurement

Kenichiro Masaoka

doi:10.1364/OE.27.001345

Practical edge-based modulation transfer function measurement

2019-01-15

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Kenichiro Masaoka *

DOI：10.1364/OE.27.001345

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The accuracy and precision of the modulation transfer function (MTF) of a sampled imaging system are affected by the shift-variant nature of subpixel binning of the pixel values in edge-based methods. This study demonstrates that a binning phase selected from a small number of binning phases can achieve a practical precision criterion for the MTF measurement. Furthermore, the new method proposed in this paper approximates the non-aliased, fundamental MTF without edge angle estimation and the following subpixel binning. The algorithm simply averages the aliased MTFs calculated from the row-by-row edge gradients in the region of a bitonal edge image and removes an assumed aliasing component. This method is also applicable to an oblique and non-straight edge. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Practical edge-based modulation transfer function measurement

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