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Proceedings Paper

Modeling of illumination effects for image processing of microvessels
Author(s): Carl E. Wick; Murray H. Loew; Joseph Kurantsin-Mills
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Paper Abstract

This research is in support of the development of an image processing system which is capable of detecting and tracking blood vessels in photographs or video images of the human microcirculation system. We describe a model which replicates the illumination processes contributing to a film or video image of the microvessels of the human bulbar conjunctiva. The model provides a foundation for microvessel detection algorithms, for measurement of vessel parameters, for determining relative depth of blood vessels, and for separating neighboring vessels in complex images. The model is based on a cylindrical vessel embedded in a diffuse medium which is on a reflecting background. A light source illuminating the scene is reflected by it's components and passes through a pinhole to an image plane, which records these reflections as intensity values at discrete pixel locations. Fundamental physical principles which include Lambert's cosine law, isotropic spreading, Fresnel's law and Beer's law are systematically applied to the model. A video apparatus and a phantom were constructed to analyze different illumination conditions and to verify the model. A simulation based on the model compared favorably with data taken from phantom images.

Paper Details

Date Published: 30 June 1993
PDF: 12 pages
Proc. SPIE 1897, Medical Imaging 1993: Image Capture, Formatting, and Display, (30 June 1993); doi: 10.1117/12.146987
Show Author Affiliations
Carl E. Wick, U.S. Naval Academy (United States)
Murray H. Loew, George Washington Univ. (United States)
Joseph Kurantsin-Mills, George Washington Univ. (United States)

Published in SPIE Proceedings Vol. 1897:
Medical Imaging 1993: Image Capture, Formatting, and Display
Yongmin Kim, Editor(s)

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