Suitability of Parametric Shepard Interpolation for Nonrigid Image Registration
نویسندگان
چکیده
Shepard interpolation is known to produce flat horizontal spots at and around data points. The phenomenon is caused by Shepard’s use of rational inversedistance weight functions, producing similar values around data points. In this paper, a parametric version of Shepard interpolation is introduced that avoids flat horizontal spots. Because Shepard interpolation or its parametric version does not require the solution of a system of equations, the interpolation is stable under varying density and organization of data points as well as under highly varying data values. The suitability of parametric Shepard interpolation in nonrigid image registration is investigated and its speed and accuracy are compared with those of multiquadric, thin-plate spline, and moving least-squares.
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تاریخ انتشار 2014