Adaptive sampling along edges for surface rendering

Details Adaptive sampling along edges for surface rendering Adaptive sampling along edges for surface rendering

2005-03-03

2010-06-22

Johns, Andrew W (Department: 2624)

Image analysis

Applications

Biomedical applications

C382S154000

Reexamination Certificate

active

07742631

ABSTRACT:
High frequency signals cannot be reconstructed properly from sampled data if the sampling frequency lies below the Nyquist rate. The invention addresses this problem by choosing few additional sample points along a trajectory intersecting the region comprising the high frequency signals, such as an edge. Intermediate rendering data is used to determine the additional sample points. Therefore, according to an exemplary embodiment of the present invention, 4 adaptively chosen sample points per pixel may provide a visual quality comparable to 16 times super-sampling, but at a much lower computational cost.

REFERENCES:
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patent: 1 074 938 (2001-02-01), None
Lin et al., “An Anti-Aliasing Method for Parallel Rendering,” IEEE Proc. Computer Graphics Int'l '98, Jun. 22-26, 1998, pp. 228-235.
Lau, “An Adaptive Supersampling Method,” Image Analysis Applications and Computer Graphics, Proc. 3rdInt'l Computer Science Conf. ICSC '95, LNCS vol. 1024, Dec. 11-13, 1995, pp. 205-214.

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