A NOVEL VARIANT OF THE SAVITZKY-GOLAY FILTER FOR SPECTROSCOPIC APPLICATIONS

This work describes a novel variant of the Savitzky-Golay filter, By studying the underlying principles of the Savitzky-Golay filter a digital filter has been designed which improves the low-pass filter characteristics, whilst maintaining the 'shape'-conserving features of the original method. This novel variant is compared with the original method and a standard method of improving the low-pass characteristics, namely multiple applications of the original method. The variant incurs a similar computational overhead to the original method, and in addition provides improved filtering characteristics. Consequently it should supersede the Savitzky-Golay filter in spectroscopic applications.