An Adaptive Estimating Centroid Method for Measurement of Human Eye Aberration

A new adaptive method is given in this paper to estimate the centroid of images caught by Hartmann-Shack wavefront sensor after analyzing the reason of causing error. This method is based on the morphological filter, dynamic tracing of spot window, and iterative approximation algorithm. It is more accurate and adaptive than general methods. The experimental results show that the method is with strong anti-noise ability, and obviously improves the spot recognition rate and centroid detection accuracy, which effectively extends the applicability of Hartmann-Shack wavefront sensor.