Abstract

We present an efficient three-phase algorithm for volume viewing that is based on exploit- - t ing coherency between rays in parallel projection. The algorithm starts by building a ray emplate and determining a special plane for projection -- the base-plane. Parallel rays are cast t into the volume from within the projected region of the volume on the base-plane, by repeating he sequence of steps specified in the ray-template. We carefully choose the type of line to be s employed and the way the template is being placed on the base-plane in order to assure uniform ampling of the volume by the discrete rays. We conclude by describing an optimized software K implementation of our algorithm and reporting its performance. eywords: volume rendering, ray casting, template, parallel projection 1. Introduction Volume visualization is the process of converting complex volume data to a format that is p amenable to human understanding while maintaining the integrity and accuracy of the data. Th...

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