Fourier slice photography Export

@inproceedings{citeulike:2688360, abstract = {This paper contributes to the theory of photograph formation from light fields. The main result is a theorem that, in the Fourier domain, a photograph formed by a full lens aperture is a 2D slice in the 4D light field. Photographs focused at different depths correspond to slices at different trajectories in the 4D space. The paper demonstrates the utility of this theorem in two different ways. First, the theorem is used to analyze the performance of digital refocusing, where one computes photographs focused at different depths from a single light field. The analysis shows in closed form that the sharpness of refocused photographs increases linearly with directional resolution. Second, the theorem yields a Fourier-domain algorithm for digital refocusing, where we extract the appropriate 2D slice of the light field's Fourier transform, and perform an inverse 2D Fourier transform. This method is faster than previous approaches.}, address = {New York, NY, USA}, author = {Ng, Ren}, booktitle = {SIGGRAPH '05: ACM SIGGRAPH 2005 Papers}, citeulike-article-id = {2688360}, citeulike-linkout-0 = {http://portal.acm.org/citation.cfm?id=1073256}, citeulike-linkout-1 = {http://dx.doi.org/10.1145/1186822.1073256}, doi = {10.1145/1186822.1073256}, keywords = {4-d, fourier, p\_my\_db\_cul}, location = {Los Angeles, California}, pages = {735--744}, posted-at = {2009-11-03 06:17:52}, priority = {2}, publisher = {ACM}, title = {Fourier slice photography}, url = {http://dx.doi.org/10.1145/1186822.1073256}, year = {2005} }

TY - CONF ID - citeulike:2688360 L3 - citeulike-article-id:2688360 N2 - This paper contributes to the theory of photograph formation from light fields. The main result is a theorem that, in the Fourier domain, a photograph formed by a full lens aperture is a 2D slice in the 4D light field. Photographs focused at different depths correspond to slices at different trajectories in the 4D space. The paper demonstrates the utility of this theorem in two different ways. First, the theorem is used to analyze the performance of digital refocusing, where one computes photographs focused at different depths from a single light field. The analysis shows in closed form that the sharpness of refocused photographs increases linearly with directional resolution. Second, the theorem yields a Fourier-domain algorithm for digital refocusing, where we extract the appropriate 2D slice of the light field's Fourier transform, and perform an inverse 2D Fourier transform. This method is faster than previous approaches. CY - Los Angeles, California AD - New York, NY, USA EP - 744 TI - Fourier slice photography PB - ACM T2 - SIGGRAPH '05: ACM SIGGRAPH 2005 Papers SP - 735 KW - 4-d KW - fourier KW - p_my_db_cul AU - Ng, Ren PY - 2005/// UR - http://dx.doi.org/10.1145/1186822.1073256 ER -