Title :
Measurement of Space Variant PSF for Restoring Degraded Images by Security Cameras
Author :
Ito, Tadashi ; Fujii, Yusaku ; Ohta, Naoya ; Saitoh, Saburou ; Matsuura, Tsutomu ; Yamamoto, Takao
Author_Institution :
Dept. of Electron. Eng., Gunma Univ.
Abstract :
Images recorded by a security camera have often severely degraded due to dirty lens or secular distortion of the recording system. To restore these images, the fully determination of space variant point spread function (PSF) is required. To measure PSF, we used a liquid crystal display. We made some experiment to restore the images by a CCD camera with intentionally distorted optics
Keywords :
CCD image sensors; image restoration; liquid crystal displays; optical images; optical information processing; optical transfer function; security; CCD camera; degraded images restoration; dirty lens; image recording system; inverse problem; liquid crystal display; security cameras; space variant PSF measurement; space variant point spread function; Cameras; Degradation; Distortion measurement; Extraterrestrial measurements; Image restoration; Lenses; Liquid crystal displays; Optical distortion; Optical recording; Security; Inverse problem; Shift variant point spread function; liquid crystal display;
Conference_Titel :
SICE-ICASE, 2006. International Joint Conference
Conference_Location :
Busan
Print_ISBN :
89-950038-4-7
Electronic_ISBN :
89-950038-5-5
DOI :
10.1109/SICE.2006.314759
