Near-light perspective shape from shading for 3D visualizations in endoscopy systems

Abstract

A near-light perspective shape from shading (SfS) technique applied to endoscopy for 3D visualizations of the gastrointestinal tract regions is presented. By utilizing an extensible reflectance model, we study a robust Huber regularization function based variational SfS model. A balancing parameter is used for weighting the irradiance ad smoothness/regularization terms. Experimental results on different endoscopy systems show that we obtain 3D visualizations without shrinkage and dilation artifacts on mucosa tissues associated with other SfS models from the past.