Real-time Ray Casting on Programmable GPU
KE Yong-zhen · Jisuanji fangzhen · 2007
An implementation of ray casting on programmable GPU (Graphics Process Unit) was proposed for achieving real-time performance of volume rendering algorithms as well as high-quality images. GRC,short for GPU-based ray casting,takes the processes of resampling and classification in GPU. Inverse-matrix projection is used for reducing the computing complexity of resamples’ coordinates. Post-classification is employed to control the required main memory and texture memory of ray casting. The experiments show that GRC can produce high-quality images at the rate of over 30 fps for 2563 volume datasets.