| 摘要 |
In a data conversion method which refers to textures for converting an input value into an output value by using a predetermined function, the data conversion method includes: converting the input value into an unequal division value, producing a linearly approximated component of the unequal division value, producing an expansion coefficient corresponding to the unequal division value, producing a function value of a quadratic or larger degree component of a orthogonal function expressing the function for the interval containing the unequal division value, calculating the product of the produced expansion coefficient and the produced function value, and adding the obtained product to the produced linearly approximated component to obtain the output value.
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