The following publications are possibly variants of this publication:
- Opacity specification based on visibility ratio and occlusion vector in direct volume renderingLu Li, Hu Peng, Xun Chen, Juan Cheng, Dayong Gao. bspc, 34:174-182, 2017. [doi]
- Perception-Based Transparency Optimization for Direct Volume RenderingMing-Yuen Chan, Yingcai Wu, Wai-Ho Mak, Wei Chen, Huamin Qu. tvcg, 15(6):1283-1290, 2009. [doi]