Signal processing method, signal processing program, recording medium storing the signal processing program and signal processor
First Claim
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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, andwherein a smoothing spline curved surface corresponding to the measurement data is generated so as to conduct a robust spline filtering on the measurement data.
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Abstract
A signal processing method is disclosed, where, after inputting a measurement data weighted-spline filter formula is selected to calculate an initial value of a spline filter, weight is adjusted, spline filter output is calculated, convergence is judged thereafter. When the weight is not judged converged, the weight is updated and the weight adjusting and spline filter output calculation are repeated, to conduct a robust spline filtering on the measurement data.
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Citations
8 Claims
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1. A signal processing method for filtering a measurement data obtained by measuring a surface area having a predetermined size, comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A signal processing program executing a signal processing method for filtering a measurement data obtained by measuring a surface area having a predetermined size, with a computer, the method comprising the steps of:
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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.
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7. A recording medium storing a signal processing program therein, wherein the program executes a signal processing method for filtering a measurement data obtained by measuring a surface area having a predetermined size, with a computer, the method comprising the steps of:
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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.
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8. A signal processing unit executing a signal processing program with a computer, wherein the program executes a signal processing method for filtering a measurement data obtained by measuring a surface area having a predetermined size, with a computer, the method comprising the steps of:
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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.
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Specification