Patent ID: 7188054
Filing Date: 2007-03-06
Classification: G01B,G01D,G06T

Abstract:
1. A signal processing method for filtering a measurement data obtained by measuring a surface area having a predetermined size, comprising the steps of: inputting the measurement data; selecting a predetermined weighted-spline filter formula; applying a weight on the measurement data by a unit matrix so as to obtain an initial value of a spline filter output; adjusting and determining the weight on the measurement data; calculating the spline filter output using the determined weight; determining convergence of the weight; and outputting a signal processing result based on the spline filter output, wherein, when it is not judged that the weight is converging, updating the weight and repeating the steps of adjusting the weight and calculating the spline filter output, and wherein a smoothing spline curved surface corresponding to the measurement data is generated so as to conduct a robust spline filtering on the measurement data.