A new concept called defocus morphing in real aperture images is introduced. View morphing is an existing example of shape-preserving image morphing based on the motion cue. It is proved that images can also be morphed based on the depth-related defocus cue. This illustrates that the morphing operation is not necessarily a geometric process alone; one can also perform a photometry-based morphing wherein the shape information is implicitly buried in the image intensity field. A theoretical understanding of the defocus morphing process is presented. It is shown mathematically that, given two observations of a three-dimensional scene for different camera parameter settings, we can obtain a virtual observation for any camera parameter setting through a simple nonlinear combination of these observations.
© 2005 Optical Society of America
(100.1830) Image processing : Deconvolution
(100.6890) Image processing : Three-dimensional image processing
(110.2990) Imaging systems : Image formation theory
(330.3790) Vision, color, and visual optics : Low vision
(330.6110) Vision, color, and visual optics : Spatial filtering
Subhasis Chaudhuri, "Defocus morphing in real aperture images," J. Opt. Soc. Am. A 22, 2357-2365 (2005)