The rendering is calculated by estimating the surface normal from the z-buffer gradient. We also developed a method for casting shadows using only the z-buffer. 1986 - Development of the gray level gradient method which computes a smooth surface normal with a high dynamic range from the original tomographic data. The image shows a post operative CT study.
Several artifacts are due to metallic dental fillings and patient movement during acquisition.
Click here for more. Click here for more. We improved the rendering yielding nearly photorealistic views. Imaging , vol.