Sampled points decomposing based ray casting for virtual endoscopy

Feiniu Yuan; Heqin Zhou; He Zhao; Huanqing Feng

doi:10.1117/12.477109

31 July 2002 Sampled points decomposing based ray casting for virtual endoscopy

Feiniu Yuan, Heqin Zhou, He Zhao, Huanqing Feng

Proceedings Volume 4875, Second International Conference on Image and Graphics; (2002) https://doi.org/10.1117/12.477109
Event: Second International Conference on Image and Graphics, 2002, Hefei, China

Abstract

In this paper, we presented a novel ray casting algorithm, which can escape time- consuming operation of truncating a floating-point number during resampling. By converting every sampled point into the vector sum of the vectors, which are comprised by the integer vector point and the floating-point vector point, and utilizing coherence between adjacent sampled points, we can completely escape the operation of truncating a floating-point number. Applied this algorithm, rendering speed can be improved obviously in ray casting algorithm with tn-linear interpolation. The algorithm is robust and can be easily combined with other fast ray casting algorithms to further speed up the rendering. Because this algorithm does not need additional memory consumption and other time-consuming preprocess, and moreover it does not degrade the image quality, it is very useful in the implementation of virtual endoscopy system.

Citation Download Citation

Feiniu Yuan, Heqin Zhou, He Zhao, and Huanqing Feng "Sampled points decomposing based ray casting for virtual endoscopy", Proc. SPIE 4875, Second International Conference on Image and Graphics, (31 July 2002); https://doi.org/10.1117/12.477109

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