Title :
Research on image restoration of Roll-Swing imaging seeker
Author :
Bai, Yang ; Zhang, Hongwei ; Han, Xuefeng ; Wei, Qun ; Jia, Hongguang ; Guo, Lihong
Author_Institution :
Changchun Inst. of Opt., Fine Mech. & Phys., Chinese Acad. of Sci., Changchun, China
Abstract :
To achieve a correct image receiving for Roll-Swing imaging seeker, the mechanism and imaging process is analyzed. The causes of image rotation are discussed. The influence of the frame encoders´ precision on imaging de-rotation quality is analyzed. The Roll-Swing imaging seeker is designed for high-speed aerocraft, thus the received images are greatly degraded due to atmospheric turbulence. A new method of image restoration is proposed for turbulence-degraded images in this paper. The method is to get point spread function (PSF) based on the estimation of optical transfer function (OTF) according to the optical system design simulation. Finally, to obtain the restored image, constrained least squares filtering is used with the known PSF. The experiment results indicate that the new restoration method has a favorable effect to satisfy requirement of the automatic target recognition.
Keywords :
aircraft; filtering theory; image restoration; least squares approximations; object recognition; optical transfer function; OTF; PSF; atmospheric turbulence; automatic target recognition; constrained least squares filtering; high-speed aerocraft; image restoration; image rotation; imaging de-rotation quality; imaging process; optical system design simulation; optical transfer function; point spread function; roll-swing imaging seeker; turbulence-degraded images; Digital signal processing; Image restoration; Roll-Swing seeker; image de-rotation; image restoration; turbulence-degraded image;
Conference_Titel :
Advanced Computer Control (ICACC), 2011 3rd International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-8809-4
Electronic_ISBN :
978-1-4244-8810-0
DOI :
10.1109/ICACC.2011.6016416
