This paper presents a new volume rendering acceleration algorithm for semi-transparent volume objects.The volume rendering pipeline processor VGE provides full support for the popular ray casting acceleration techniques such as adaptive-ray-termination and space-leaping

thus it achieves frame rate up to 70Hz.Nevertheless

such high frame rates can only be achieved in the case that the volume elements are mapped either opaque or transparent.The new acceleration algorithm is designed to relax the dependence of the frame rate on the selected opacity mapping functions.The new algorithm uses an adaptive resampling strategy to replace the equidistant resampling

hence the time complexity is reduced and the memory bandwidth requirement is lowered.Experimental results show that the new algorithm can accelerate the rendering of semi-transparent volume objects by up to 4.7 times.Like space-leaping

the new algorithm needs to encode the adaptive sampling interval in a preprocessing stage.The preprocessing can be implemented in less than 30 seconds for volume data with 8 million voxels by heuristic algorithmic optimizations.