Form error removal of sanded wood surfaces

摘要

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.