Layered Peeling Algorithm of Direct Volume Rendering for Medical Dataset

To visualize medical volume dataset,we often render the regions of interest with an appropriate transfer function.However,the occluded regions are unable to be clearly displayed by merely modifying the transfer functions.In this paper we present a novel layered peeling algorithm to direct volume rendering for medical dataset.By the algorithm,the opacity slope in terms of the minimum and maximum values of adjacent opacity,is calculated,and the layers as defined by the threshold of the slope given by the user and the accumulated opacity,are used to render the volume dataset.Our approach can be used to accurately locate the layer boundaries associated with the features of medical volume dataset,and experiments show that our method can be employed to produce better quality images at a high speed than previous methods.