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A Flexible Pinhole Camera Model for Coherent Nonuniform Sampling
July-Aug. 2014 (vol. 34 no. 4)
pp. 30-41
Voicu Popescu, Purdue University
Bedrich Benes, Purdue University
Paul Rosen, University of Utah
Jian Cui, Purdue University
Lili Wang, Beihang University
The flexible pinhole camera (FPC) allows flexible modulation of the sampling rate over the field of view. The FPC is defined by a viewpoint and a map specifying the sampling locations on the image plane. The map is constructed from known regions of interest with interactive and automatic approaches. The FPC provides inexpensive 3D projection that allows rendering complex datasets quickly, in feed-forward fashion, by projection followed by rasterization. The FPC supports many types of data, including image, height field, geometry, and volume data. The resulting image is a coherent nonuniform sampling (CoNUS) of the dataset that matches the local variation of the dataset's importance. CoNUS images have been successfully implemented for remote visualization, focus-plus-context visualization, and acceleration of expensive rendering effects such as surface geometric detail and specular reflection. A video explaining and demonstrating the FPC is at http://youtu.be/kvFe5XjOPNM.
Index Terms:
Cameras,Rendering (computer graphics),Data visualization,Image resolution,Context,Servers,Approximation methods,visualization,camera models,nonuniform sampling,interactive rendering,remote visualization,specular-reflection rendering,surface-geometric-detail rendering,volume rendering,focus-plus-context visualization,computer graphics,pinhole cameras,nonpinhole cameras,graphics
Citation:
Voicu Popescu, Bedrich Benes, Paul Rosen, Jian Cui, Lili Wang, "A Flexible Pinhole Camera Model for Coherent Nonuniform Sampling," IEEE Computer Graphics and Applications, vol. 34, no. 4, pp. 30-41, July-Aug. 2014, doi:10.1109/MCG.2014.21
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