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Abstract
Photographic volumes have been increasingly used in medical and biological researches in recent years. The original colors kept in photographic volumes present great opportunities to capture a rich set of information within the dataset for a wide variety of data analysis and visualization applications. Despite years of research, an interactive and user-friendly transfer function is still lacking for photographic volume visualization. The difficulty lies in how to map colors to a space that is convenient and intuitive for users to interactively classify features, i.e., specifying opacities for voxels. In this paper, we propose a color-based transfer function for intuitive opacity specification of photographic volumes. The color-based transfer function intelligently maps the colors from 3D to 1D, resulting in 256 representative colors which preserve the original colors to the maximum extent. Users can directly classify voxels based on these representative colors similar to the conventional 1D transfer function. Experiments are performed to evaluate the effectiveness of the proposed method, and also demonstrate the intuitiveness and flexibility of the proposed method.
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Acknowledgments
This work was partially supported by 863 Program Project 2012AA12A404, National Natural Science Foundation of China No. 61472354 and the Fundamental Research Funds for the Central Universities (2013QNA5010).
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State Key Lab of CAD&CG, Zhejiang University, Hangzhou, China
Bin Zhang, Yubo Tao & Hai Lin
Centre for Computer Graphics and Visualisation, University of Bedfordshire, Luton, UK
Feng Dong & Gordon Clapworthy
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Zhang, B., Tao, Y., Lin, H.et al. Intuitive transfer function design for photographic volumes.J Vis18, 571–580 (2015). https://doi.org/10.1007/s12650-014-0267-5
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