Display of Surfaces from Volume Data
IEEE Computer Graphics and Applications
Scale-Space and Edge Detection Using Anisotropic Diffusion
IEEE Transactions on Pattern Analysis and Machine Intelligence
Semi-automatic generation of transfer functions for direct volume rendering
VVS '98 Proceedings of the 1998 IEEE symposium on Volume visualization
Tissue Classification Based on 3D Local Intensity Structures for Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
Multidimensional Transfer Functions for Interactive Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
Interactive Focus+Context Visualization with Linked 2D/3D Scatterplots
CMV '04 Proceedings of the Second International Conference on Coordinated & Multiple Views in Exploratory Visualization
Gaussian Transfer Functions for Multi-Field Volume Visualization
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Curvature-Based Transfer Functions for Direct Volume Rendering: Methods and Applications
Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Visualization of Boundaries in Volumetric Data Sets Using LH Histograms
IEEE Transactions on Visualization and Computer Graphics
Interactive multi-scale exploration for volume classification
The Visual Computer: International Journal of Computer Graphics
Local Histograms for Design of Transfer Functions in Direct Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
Real-time Volume Graphics
High-Level User Interfaces for Transfer Function Design with Semantics
IEEE Transactions on Visualization and Computer Graphics
Texture-based Transfer Functions for Direct Volume Rendering
IEEE Transactions on Visualization and Computer Graphics
Size-based Transfer Functions: A New Volume Exploration Technique
IEEE Transactions on Visualization and Computer Graphics
PACIFICVIS '09 Proceedings of the 2009 IEEE Pacific Visualization Symposium
The Occlusion Spectrum for Volume Classification and Visualization
IEEE Transactions on Visualization and Computer Graphics
PACIFICVIS '11 Proceedings of the 2011 IEEE Pacific Visualization Symposium
Information-based transfer functions for multimodal visualization
EG VCBM'08 Proceedings of the First Eurographics conference on Visual Computing for Biomedicine
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Direct volume rendering has been an active area of research for over two decades. Transfer function design remains a difficult task since current methods, such as traditional 1D and 2D transfer functions, are not always effective for all data sets. Various 1D or 2D transfer function spaces have been proposed to improve classification exploiting different aspects, such as using the gradient magnitude for boundary location and statistical, occlusion, or size metrics. In this paper, we present a novel transfer function method which can provide more specificity for data classification by combining different transfer function spaces. In this work, a 2D transfer function can be combined with 1D transfer functions which improve the classification. Specifically, we use the traditional 2D scalar/gradient magnitude, 2D statistical, and 2D occlusion spectrum transfer functions and combine these with occlusion and/or size-based transfer functions to provide better specificity. We demonstrate the usefulness of the new method by comparing to the following previous techniques: 2D gradient magnitude, 2D occlusion spectrum, 2D statistical transfer functions and 2D size based transfer functions.