Research On The Accelerated Ray Tracing For Volume-rendering Based On GPU

Early stage, ray tracing algorithm for volume rendering is mainly achieved by the CPU, and the GPU is mainly used for graphics processing. In the paper, we will take advantage of the GPU parallel processing capability and powerful programmable, and take the GPU as a stream processor to accelerate the processing algorithm.Firstly, we have elaborate the details about create and traverse based on GPU of the three acceleration structures like Uniform Grid, KD-tree, BVH, which are often used by ray tracing algorithm for volume rendering, the paper compare and analyze the three acceleration structures.Secondly, we have a detailed introduce for the graphics rendering pipeline of the GPU and development tools for stream processing, and through the design of a stream processing model, ray tracing for volume-rendering based on GPU has been detail introduced how to make it realized.Lastly, we have a comparison tests under different complicated scene and resolutions. By comparison shows that better reflect the advantages of GPU, and by comparing the algorithm to achieve further improvements.