Frequency limitations of the two-point central difference differentiation algorithm
- 1 August 1982
- journal article
- research article
- Published by Springer Nature in Biological Cybernetics
- Vol. 45 (1) , 1-4
- https://doi.org/10.1007/bf00387207
Abstract
A two-point central difference algorithm is often used to calculate the derivative of a function. This estimate is only valid over a limited frequency range. Therefore, the algorithm can be modeled as an ideal differentiator in series with a low-pass filter. The filter cutoff frequency is a function of the time between the points. We discuss the accuracy and limitations of using this algorithm on human saccadic eye movement data. To calculate the velocity of saccadic eye movements the algorithm should have a cutoff frequency of 74 Hz or above.This publication has 3 references indexed in Scilit:
- A Comparison of Digital Algorithms Used in Computing the Derivative of Left Ventricular PressureIEEE Transactions on Biomedical Engineering, 1981
- VARIABILITY AND DEVELOPMENT OF A NORMATIVE DATA-BASE FOR SACCADIC EYE-MOVEMENTS1981
- Measurement of evoked potentialsPublished by Springer Nature ,1980