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.

fYear

2006

Firstpage

2542

Lastpage

2545

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;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE-ICASE, 2006. International Joint Conference

Conference_Location

Busan

Print_ISBN

89-950038-4-7

Electronic_ISBN

89-950038-5-5

Type

conf

DOI

10.1109/SICE.2006.314759

Filename

4108071