Optics and Photonics Society of Iran

In The wavefront-sensor is one of the most important components of any adaptive optics (AO) system. The simplicity of the Shack-Hartmann sensor has made it a popular choice for such systems. It̕ s accuracy, which largely determines performance of AO systems, depends on having a good and robust centroid algorithm. In this paper we simulate four popular centroiding algorithms in MATLAB software and we compare accuracy of any one to each other. Also we use thresholding and Gamma correction methods to reduce noise of simulated images and improve performance of the algorithms. Our simulations show that the Intensity Weighted Centroiding have the best performance and using the Gamma correction method, cause to improve performance of methods.