Title :
A New Performance Metric for Restoration of Turbulence-Degraded Extended Object
Author :
Yang, Huizhen ; Zheng, Hongjie
Author_Institution :
Inst. of Control Eng. Technol., Huaihai Inst. of Technol., Lianyungang, China
Abstract :
A new performance metric the gray level variance function is offered, which is merely from a gray level distorted image and without any additional optics elements. Based on Stochastic Parallel Gradient Descent (SPGD) and the gray level variance function, a high resolution imaging adaptive optics system with a 61-element deformable mirror is simulated to restore the turbulence-degraded extended object. SPGD is used to search the optimum voltages for the actuators of deformable mirror. Simulation results show the performance metric acts promising and its correction effect is very close to the least squares fitting.
Keywords :
adaptive optics; image restoration; optical computing; deformable mirror; gray level distorted image; gray level variance function; high resolution imaging; imaging adaptive optics system; stochastic parallel gradient descent function; turbulence-degraded extended object; Actuators; Adaptive optics; Deformable models; High-resolution imaging; Image restoration; Measurement; Mirrors; Optical distortion; Stochastic systems; Voltage;
Conference_Titel :
Information Engineering and Computer Science, 2009. ICIECS 2009. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4994-1
DOI :
10.1109/ICIECS.2009.5367080
