Scientific correspondence
Mosaicking and enhancement of slit lamp biomicroscopic fundus
images
Jane Asmutha, Bojidar Madjarovb, Paul Sajdaa, Jeffrey W Bergerb
a Sarnoff
Corporation, Princeton, NJ, USA, b Computer Vision Laboratory, Scheie Eye
Institute, University of Pennsylvania, Philadelphia, PA, USA
Correspondence to: Jeffrey W Berger, MD, PhD, Computer Vision Laboratory, Scheie Eye Institute, University of Pennsylvania, Philadelphia, PA 19104, USA jwberger{at}mail.med.upenn.edu
Accepted for publication 14 December 2000
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.
METHODSSlit 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.
RESULTSThe 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.
CONCLUSIONSVideo
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.
© 2001 by British Journal of Ophthalmology
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