The alpha-histogram: Using Spatial Coherence to Enhance Histograms and Transfer Function Design

• The high complexity of Transfer Function (TF) design is a major obstacle to widespread routine use of Direct Volume Rendering, particularly in the case of medical imaging. Both manual and automatic TF design schemes would benefit greatly from a fast and simple method for detection of tissue value ranges. To this end, we introduce the a-histogram, an enhancement that amplifies ranges corresponding to spatially coherent materials. The properties of the a-histogram have been explored for synthetic data sets and then successfully used to detect vessels in 20 Magnetic Resonance angiographies, proving the potential of this approach as a fast and simple technique for histogram enhancement in general and for TF construction in particular.

Nyckelord

Picture/Image Generation; Methodology and Techniques; Three-Dimensional Graphics and Realism

TECHNOLOGY

TEKNIKVETENSKAP

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