Modeling of illumination effects for image processing of microvessels

Carl E. Wick; Murray H. Loew; Joseph Kurantsin-Mills

doi:10.1117/12.146987

30 June 1993 Modeling of illumination effects for image processing of microvessels

Carl E. Wick, Murray H. Loew, Joseph Kurantsin-Mills

Proceedings Volume 1897, Medical Imaging 1993: Image Capture, Formatting, and Display; (1993) https://doi.org/10.1117/12.146987
Event: Medical Imaging 1993, 1993, Newport Beach, CA, United States

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.

Citation Download Citation

Carl E. Wick, Murray H. Loew, and Joseph Kurantsin-Mills "Modeling of illumination effects for image processing of microvessels", Proc. SPIE 1897, Medical Imaging 1993: Image Capture, Formatting, and Display, (30 June 1993); https://doi.org/10.1117/12.146987

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