Polyphase back-projection filtering for resolution enhancement of image sequences

B. Cohen, V. Avrin, I. Dinstein

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

A method for resolution enhancement of image sequences by polyphase back-projection filtering is presented. The first super-resolution image is initialized by interpolation of the first low-resolution image. The imaging system is simulated for every super-resolution image at a time, and the error between the simulated image and the corresponding low-resolution image is calculated. The resolution enhancement is achieved by back-projecting this error to the corresponding super-resolution image. The imaging system's PSF and the back-projection filter are estimated with a resolution higher than that of the super-resolution images, and the filtering is done by polyphase versions of these filters. The polyphase filters have embedded sub-pixel displacements corresponding to the translation parameters between the super-resolution image and the low-resolution one. The use of the polyphase filters allows exploitation of the observed data without any smoothing and/or interpolation operations. Also, no modeling of the PSF by an analytical function is necessary. Presented experimental results show encouraging resolution enhancements.

Original languageEnglish
Title of host publicationImage and Multidimensional Signal ProcessingMultimedia Signal Processing
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2171-2174
Number of pages4
ISBN (Electronic)0780362934
DOIs
StatePublished - 1 Jan 2000
Event25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000 - Istanbul, Turkey
Duration: 5 Jun 20009 Jun 2000

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume4
ISSN (Print)1520-6149

Conference

Conference25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000
Country/TerritoryTurkey
CityIstanbul
Period5/06/009/06/00

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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