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Table 1 Modulation and intensity thresholds calculated for two objects with different projector defocusing levels

From: Improved 3D measurement with a novel preprocessing method in DFP

Object Projector defocusing conditions Modulation thresholds Intensity threshold
t 1 t 2 t in
Object1 Nearly focused 8 53 − 1.5
Slightly defocused 8 44 − 2.5
Strongly defocused 4 22 − 2.5
Object2 Nearly focused 15 49 − 1.5
Slightly defocused 7 37 − 3.5
Strongly defocused 7 25 − 3.5
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