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- W285810787 abstract "As demands on real time 3D graphics increase we need new ways ofimproving rendering speeds. Significant speed gains can be achieved if we canremove polygons without affecting the visual fidelity of the image byremoving the ones that will not be visible to the user anyhow.Level of detail(LOD)is one such method, where each 3D model is represented at severaldifferent detail levels, each containing a different number of polygons, so thatthe rendering engine can select the most appropriate one for the current viewof the object.Traditionally the criterion used to decide what detail level should be used forthe object has been the distance to the object from the viewpoint. Thereasoning is that the further away the object is, the smaller it is likely toappear, and minor details are unlikely to be visible, and we can leave thedetails out without it being noticed.In this thesis we explore the use of other criteria for selecting detail level. Wewill discuss less common criteria that have been use in earlier works and howthose criteria can be anchored in modern cognitive sciences.The result of the thesis is a LOD map, indicating what objects in a 3D sceneshould be represented at what detail level. The LOD map consists of twomajor parts; the acuity map, and the saliency map. The acuity map iscalculated taking into considerations the shortcomings of the human visualsystem, while the saliency map is calculated using theories from the field ofvisual attention.When our demo application was tested, the results show that an averagerendering speedup of 83% might be possible to gain with only moderate lossof visual fidelity." @default.
- W285810787 created "2016-06-24" @default.
- W285810787 creator A5017933897 @default.
- W285810787 date "2013-01-01" @default.
- W285810787 modified "2023-09-27" @default.
- W285810787 title "Perceptually ModulatedLevel of Detail in Real Time Graphics" @default.
- W285810787 hasPublicationYear "2013" @default.
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