Form error removal of sanded wood surfaces
Tóm tắt
According to ISO 3274 form errors can be removed by fitting a polynomial regression through the
original measured data called the total profile to obtain the primary profile. For wood surfaces it was
found that the regression was affected by the presence of deep and grouped pores.
To obtain a primary profile free of distortion, the deep pores can be removed from the total
profile prior to applying the regression. A method was developed that eliminated the pores entirely.
The efficacy of this method was tested visually and by comparing coefficients of determination r2
between the polynomial regression according to ISO 3274 (1996) and the total profile and the modified
regression line when the effect of deep pores was removed and the modified profile that had no pores.
The influence of the shape of the primary profile obtained by the standard method in ISO 3274
(1996) on further digital processing was tested on roughness profiles filtered with a Robust Gaussian
Regression Filter. The undistorted primary profile was taken as a reference.
Tài liệu tham khảo
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