AN ADAPTIVE RADIATION OF INITIAL RAYS IN RAY TRACING BY AUTOMATIC DIFFERENTIATION(International Workshop on Advanced Image Technology 2006)

概要

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The ray tracing algorithm is well-known as one of the most popular rendering techniques in computer graphics. In the ray tracing, tracing the rays and calculating intersection between rays and objects are essential. Since usually a ray having no thickness is defined for each pixel of the image, the image may include aliasing. For anti-aliasing, one of the authors proposed an adaptive distributed ray tracing in the use of the automatic differentiation. However, number of initial rays are determined by resolution of prospective image. Therefore it takes longer time as we need larger image. Expanding the method to detection of variation over pixels. an adaptive method is proposed to determine from which pixels initial rays should be radiated. Since unnecessary initial rays are not calculated, the proposed method benefits more efficient calculation of ray tracing.
社団法人電子情報通信学会の論文
2006-01-02