C++实现的不含任何第三方库的savgol滤波算法，精度可与Opencv的媲美

C++实现的不含任何第三方库的savgol滤波算法，精度可与Opencv的媲美。根据论文Smoothing and Differentiation of Data by Simplified Least Squares Procedures" by A.Savitzky and M. J.E Golay。