12 February 2008 Surface shape parameters and analysis of data captured with use of 4D surface scanners
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Abstract
The recent development of electro-optical instrumentation allowed constructing 4D (3D + time) structure-light scanners which may be used to measure the surface of human body in motion. The main advantage of structure-light scanners is the possibility of capturing data from the whole measured body surface, while traditional marker-based systems acquire data only form markers attached to skin of the examined patient. The paper describes new parameters describing the local shape of measured surface. The distribution maps of these parameters allow discrimination of various surface types and in effect localization and tracing of under-skin anatomical structures in time. The presented parameters give similar results to well-known curvatures but are easier and quicker to calculate. Moreover the calculation process of the new parameters is more numerically stable itself. The developed path of processing and analysis of 4D measurement data has been presented. It contains the following stages: data acquisition, volumetric model creation, calculations of shape parameters, selecting areas of interest, locating and tracing of anatomical landmarks. Exemplary results of application of developed parameters and methods to real measurement and computer generated data are also presented.
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Marcin Witkowski, Robert Sitnik, Walter Rapp, Bart Haex, Marcin Kowalski, Sven Mooshake, "Surface shape parameters and analysis of data captured with use of 4D surface scanners", Proc. SPIE 6848, Advanced Biomedical and Clinical Diagnostic Systems VI, 684815 (12 February 2008); doi: 10.1117/12.763987; https://doi.org/10.1117/12.763987
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