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. 2001 May;85(5):563–565. doi: 10.1136/bjo.85.5.563

Mosaicking and enhancement of slit lamp biomicroscopic fundus images

J Asmuth 1, B Madjarov 1, P Sajda 1, J Berger 1
PMCID: PMC1723974  PMID: 11316718

Abstract

AIMS—To process video slit lamp biomicroscopic fundus image sequences in order to generate wide field, high quality fundus image montages which might be suitable for photodocumentation.
METHODS—Slit lamp biomicroscopic fundus examination was performed on human volunteers with a contact or non-contact lens. A stock, charge coupled device camera permitted image capture and storage of the image sequence at 30 frames per second. Acquisition time was approximately 30 seconds. Individual slit lamp biomicroscope fundus image frames were aligned and blended with custom developed software.
RESULTS—The developed algorithms allowed for highly accurate alignment and blending of partially overlapping slit lamp biomicroscopic fundus images to generate a seamless, high quality, wide field montage.
CONCLUSIONS—Video image acquisition and processing algorithms allow for mosaicking and enhancement of slit lamp biomicroscopic fundus images. The improved quality and wide field of view may confer suitability for inexpensive, real time photodocumentation of disc and macular abnormalities.



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Figure 1  .

Figure 1  

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(A) Unprocessed slit lamp biomicroscopic fundus images of an eye with presumed ocular histoplasmosis syndrome following laser treatment for juxtafoveal choroidal neovascularisation. (B) Slit lamp fundus biomicroscopic images following automated extraction of the illuminated portion of the fundus and elimination of specular reflections.

Figure 2  .

Figure 2  

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(A) Unblended mosaic of slit lamp fundus biomicroscope images for the eye depicted in Figure 1. (B) Final blended mosaic of slit lamp derived fundus biomicroscopic images.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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