Restorations of real defocused images using blur models based on geometrical and diffraction optics

Author

Savakis, A.E. ; Trussell, H.J.

Author_Institution

Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA

fYear

1991

fDate

7-10 Apr 1991

Firstpage

919

Abstract

Out-of-focus blur models that have traditionally been used in image restoration are based on geometrical optics. Continuous-focus blurs based on the principles of diffraction optics are reviewed, and their discrete representation is discussed. Restorations are carried out by using both types of blur models for defocused images blurred in a CCD (charge-coupled-device) camera with pixel resolution equal to 6.8 μ. The differences between the restorations performed by using both types of PSF (point-spread-function) models are not significant. The accuracy of the representation of the PSF generated by using diffraction optics and the resulting restoration quality are linked to the pixel resolution

Keywords

geometrical optics; physical optics; picture processing; CCD camera; PSF; blur models; continuous blurs; diffraction optics; discrete representation; geometrical optics; image restoration; pixel resolution; point-spread-function; real defocused images; Apertures; Charge coupled devices; Geometrical optics; Image restoration; Optical diffraction; Optical films; Optical sensors; Particle beam optics; Physical optics; Solid modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon '91., IEEE Proceedings of

Conference_Location

Williamsburg, VA

Print_ISBN

0-7803-0033-5

Type

conf

DOI

10.1109/SECON.1991.147894

Filename

147894