Title:	SKULL REGISTRATION WITH MODIFIED INVERSE CHORD LENGTH AND RIGID SUPER-CURVES INCORPORATED WITH SCALING
Author(s):	Tan Joi San, Iman Yi Liao, Pan Zheng, Bahari Belaton
ISBN:	978-972-8939-22-9
Editors:	Yingcai Xiao, Tomaz Amon and Piet Kommers
Year:	2010
Edition:	Single
Keywords:	Rigid Super-Curves . B-spline parameterisation . Modified inverse chord length . Controllability . Scaling factor
Type:	Full Paper
First Page:	133
Last Page:	140
Language:	English
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Paper Abstract:	In this paper, two enhancements are proposed based on 3D Rigid Super-Curves (RSC), which performs rigid registration of two sets of curves by utilizing Super-Curves (SC) where a single B-spline is fitted to both reference and test curves. Firstly, instead of using uniform parameterization in RSC, a modified inverse chord length method is proposed for B-spline parameterisation. It takes the advantage that inverse chord length has much better controllability (i.e. assigning more control points to densely sampled or high variation areas) over other B-spline parameterization methods, and further improves its fitting accuracy by automatically determining the value of the exponential parameter and taking the square-root of the measurements in the original method. Secondly, to further improve the registration accuracy, a uniform scaling factor is incorporated in RSC for the transformation. An iterative algorithm facilitated with some heuristic initial values and stopping criteria is proposed to recover all the transformations alternatively with a fast convergence rate. Experiments on real skull showed the effectiveness of the proposed method.
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