Removal of optical fiber interference in color micro-endoscopic images

Molly M. Dickens, Darryl J. Bornhop, Sunanda Mitra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

Flexible micro-endoscopes produce images that are obscured by a `honeycomb' pattern due to the negative space between the individual optical fibers contained in the imaging conduit. This pattern is found to exhibit a spatial frequency that is visibly distinct from that of the imaged object. By applying a frequency filter, it was possible to remove the honeycomb pattern without significant degradation to the visual quality of the image. This process will greatly increase the perceived quality of the information being obtained by the endoscopes and aid in their effective use for medical diagnosis. The technique described employs Fourier spectral analysis to determine the `noise' component in the original image. A discrete band-reject frequency filter was designed by visually examining the spectral information and creating the necessary filter to block out the undesired frequency band. The honeycomb pattern was no longer distinguishable after applying this filter to a test gray-level image of an Air Force calibration target. Next, the filter was applied to the individual color planes of a sample color image. The color planes were recombined to produce a full-color image free from interference. A full description of the methods involved is presented.

Original languageEnglish
Title of host publicationProceedings of the IEEE Symposium on Computer-Based Medical Systems
Editors Anon
Pages246-251
Number of pages6
DOIs
StatePublished - Jan 1 1998
EventProceedings of the 1998 11th IEEE Symposium on Computer-Based Medical Systems - Lubbock, TX, USA
Duration: Jun 12 1998Jun 14 1998

Publication series

NameProceedings of the IEEE Symposium on Computer-Based Medical Systems
ISSN (Print)1063-7125

Conference

ConferenceProceedings of the 1998 11th IEEE Symposium on Computer-Based Medical Systems
CityLubbock, TX, USA
Period06/12/9806/14/98

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Dickens, M. M., Bornhop, D. J., & Mitra, S. (1998). Removal of optical fiber interference in color micro-endoscopic images. In Anon (Ed.), Proceedings of the IEEE Symposium on Computer-Based Medical Systems (pp. 246-251). (Proceedings of the IEEE Symposium on Computer-Based Medical Systems). https://doi.org/10.1109/CBMS.1998.701364