This paper presents a rational-operator-based approach to depth from defocus (DfD) for the reconstruction of three-dimensional scenes from two-dimensional images, which enables fast DfD computation that is independent of scene textures. Two variants of the approach, one using the Gaussian rational operators (ROs) that are based on the Gaussian point spread function (PSF) and the second based on the generalized Gaussian PSF, are considered. A novel DfD correction method is also presented to further improve the performance of the approach. Experimental results are considered for real scenes and show that both approaches outperform existing RO-based methods.
© 2013 Optical Society of America
Original Manuscript: April 26, 2013
Revised Manuscript: July 19, 2013
Manuscript Accepted: July 25, 2013
Published: August 19, 2013
Ang Li, Richard Staunton, and Tardi Tjahjadi, "Rational-operator-based depth-from-defocus approach to scene reconstruction," J. Opt. Soc. Am. A 30, 1787-1795 (2013)