Robust focus ranging
- 2 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 10636919,p. 309-314
- https://doi.org/10.1109/cvpr.1992.223258
Abstract
Depth maps obtained from focus ranging can have numerous errors and distortions due to edge bleeding, feature shifts, image noise, and field curvature. An improved algorithm that examines an initial high depth-of-field image of the scene to identify regions susceptible to edge bleeding and image noise is given. Focus evaluation windows are adapted to local image content and optimize the tradeoff between spatial resolution and noise sensitivity. An elliptical paraboloid field curvature model is used to reduce range distortion in peripheral image areas. Spatio-temporal tracking compensates for image feature shifts. The result is a sparse but reliable depth map.Keywords
This publication has 9 references indexed in Scilit:
- Parallel Depth Recovery By Changing Camera ParametersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- A depth recovery algorithm using defocus informationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A simple, real-time range cameraPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Pyramid based depth from focusPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A matrix based method for determining depth from focusPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Shape from focus: an effective approach for rough surfacesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- FocusingInternational Journal of Computer Vision, 1988
- A New Sense for Depth of FieldPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1987
- A Perspective on Range Finding Techniques for Computer VisionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1983