Image enhancement of a convex polyhedral object by optimal illumination
Gateau, Aline Dominique
de Figueiredo, Rui J. P.
Master of Science
It is possible to enhance the image of an object without any image processing by optimal illumination. This thesis first reviews some basic results in radiometry and image formation. Then it proposes a method for optimally illuminating a convex polyhedral object made of k Lambertian faces by a set of directional light beams according to an edge detection criterion. The illumination of the scene is considered to be optimal when the edges of the corresponding image have the best chance of being detected simultaneously. This can be expressed as a maximin optimization problem on a set of values characterizing the edges. The solution to this problem is derived in the case of a convex prism lighted by a single directional light beam and the results of an experiment corresponding to this case are given.
Electronics; Electrical engineering; Optics