Title :
An Adaptive Estimating Centroid Method for Measurement of Human Eye Aberration
Author :
Liang, Chun ; Liao, Wenhe ; Shen, Jianxin ; Niu, Saisai
Author_Institution :
Coll. of Mech. & Electr. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
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.
Keywords :
bio-optics; biomedical measurement; computational complexity; iterative methods; vision defects; wavefront sensors; Hartmann-Shack wavefront sensor; human eye aberration measurement; image centroid estimation; iterative approximation algorithm; morphological filter; spot window dynamic tracing; Adaptive optics; Anthropometry; Background noise; Extraterrestrial measurements; Gaussian noise; Humans; Image analysis; Noise level; Optical noise; Optical sensors;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5305300
