Smooth shading across polygons is enabled by smoothing groups. Gaussian smoothing is commonly used with edge detection. SURF uses square-shaped filters as an approximation of Gaussian smoothing. Preprocessing usually consists of binarization, normalization, sampling, smoothing and denoising. He used logistic regression, correlation, and smoothing, and improved the treatment of outliers. Formaldehyde is a common ingredient in Brazilian blowouts, Cadiveu, and Keratin Complete Smoothing Therapies. Whitewash aids in sanitation by coating and smoothing over the rough surfaces. This subtraction has the effect of smoothing out the posterior distribution. This slope component is itself updated via exponential smoothing. Reduction measures are aimed at smoothing and optimising plant operation. This is fully equivalent to the aforementioned exponential smoothing. This nomenclature is similar to quadruple exponential smoothing, which also references its recursion depth. Sealants can also be used for simple smoothing or filling. It was a variation on the box mangle used primarily for pressing and smoothing cloth. A variety of different smoothing kernels have been proposed for generating pyramids.