Robust focus ranging

@inproceedings{Nair1992RobustFR,
  title={Robust focus ranging},
  author={Hari N. Nair and Charles V. Stewart},
  booktitle={CVPR},
  year={1992}
}
Depth maps obtained from focus ranging can have numerous errors and distortions due to edge bleeding, feature shifts, image noise and field curvature. Our improved algorithm examines an initial high depth of field image of the scene to identify regions susceptible t o edge bleeding and image noise. We adap t focus evaluation windows t o local image content to optimize the trade-off between spatial resohtion and noise sensitivity. A n elliptical paraboloid field curvature model is used to reduce… CONTINUE READING
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Shape from Focus : an Effective Approach for Rough Surfaces

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Becklund, Introduction to the Optical Transfer Function

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