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dc.contributor.authorScherzer, Danielen_US
dc.contributor.authorJeschke, Stefanen_US
dc.contributor.authorWimmer, Michaelen_US
dc.contributor.editorJan Kautz and Sumanta Pattanaiken_US
dc.date.accessioned2014-01-27T15:09:04Z
dc.date.available2014-01-27T15:09:04Z
dc.date.issued2007en_US
dc.identifier.isbn978-3-905673-52-4en_US
dc.identifier.issn1727-3463en_US
dc.identifier.urihttp://dx.doi.org/10.2312/EGWR/EGSR07/045-050en_US
dc.description.abstractShadow mapping suffers from spatial aliasing (visible as blocky shadows) as well as temporal aliasing (visible as flickering). Several methods have already been proposed for reducing such artifacts, but so far none is able to provide satisfying results in real time. This paper extends shadow mapping by reusing information of previously rasterized images, stored efficiently in a so-called history buffer. This buffer is updated in every frame and then used for the shadow calculation. In combination with a special confidence-based method for the history buffer update (based on the current shadow map), temporal and spatial aliasing can be completely removed. The algorithm converges in about 10 to 60 frames and during convergence, shadow borders are sharpened over time. Consequently, in case of real-time frame rates, the temporal shadow adaption is practically imperceptible. The method is simple to implement and is as fast as uniform shadow mapping, incurring only the minor speed hit of the history buffer update. It works together with advanced filtering methods like percentage closer filtering and more advanced shadow mapping techniques like perspective or light space perspective shadow maps.en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Picture/Image Generation - Display algorithms I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism - Virtual realityen_US
dc.titlePixel-Correct Shadow Maps with Temporal Reprojection and Shadow Test Confidenceen_US
dc.description.seriesinformationRendering Techniquesen_US


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