Surface detection with subvoxel accuracy using 3D directional derivatives

Xiaogu Wu; William G. Wee

doi:10.1117/12.339907

28 January 1999 Surface detection with subvoxel accuracy using 3D directional derivatives

Xiaogu Wu, William G. Wee

Proceedings Volume 3586, Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware III; (1999) https://doi.org/10.1117/12.339907
Event: Nondestructive Evaluation Techniques for Aging Infrastructures and Manufacturing, 1999, Newport Beach, CA, United States

Abstract

A surface detection method using 3D directional for extracting surface points of a solid object from its cross- sectional slices' CT images is presented. The formulas for calculating 3D directional derivatives are derived using facet model. The subvoxel accuracy is obtained by locating the zeros of the 3D second directional derivative along the estimated gradient. Experiments for applying this method to CT images of real industrial parts are performed and some results are shown.

Citation Download Citation

Xiaogu Wu and William G. Wee "Surface detection with subvoxel accuracy using 3D directional derivatives", Proc. SPIE 3586, Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware III, (28 January 1999); https://doi.org/10.1117/12.339907

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