RealTime Volume Graphics 05 Transfer Functions REALTIME VOLUME

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Real-Time Volume Graphics [05] Transfer Functions REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen,

Real-Time Volume Graphics [05] Transfer Functions REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Classification During Classification the user defines the „Look“ of the data. Which parts are

Classification During Classification the user defines the „Look“ of the data. Which parts are transparent? Which parts have which color? REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Classification During Classification the user defines the „Look“ of the data. Which parts are

Classification During Classification the user defines the „Look“ of the data. Which parts are transparent? Which parts have which color? The user defines a Transfer function. scalar S REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Transfer Function Emission RGB Absorption A (opaticity α) Eurographics 2006

Classification Real-Time update of the transfer function necessary!!! REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens

Classification Real-Time update of the transfer function necessary!!! REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Classification REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Classification REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Pre- vs Post-Interpolative Classification POST-INTERPOLATIVE optical properties interpolation optical properties PRE-INTERPOLATIVE interpolation data value

Pre- vs Post-Interpolative Classification POST-INTERPOLATIVE optical properties interpolation optical properties PRE-INTERPOLATIVE interpolation data value REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany data value Eurographics 2006

Pre- vs Post-Classification Discrete data alpha value Continuous data Scalar value Transfer Function Classified

Pre- vs Post-Classification Discrete data alpha value Continuous data Scalar value Transfer Function Classified data Analytical Solution REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Transfer Function Supersampling Transfer Function Pre-interpolative TF Post-interpolative TF Eurographics 2006

Quality: Pre- vs. Post-Classification Comparison of image quality Pre-Classification Post-Classification Same TF, same Resolution,

Quality: Pre- vs. Post-Classification Comparison of image quality Pre-Classification Post-Classification Same TF, same Resolution, same Sampling Rate REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Quality Pre-Classification REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Post-Classification Eurographics 2006

Quality Pre-Classification REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Post-Classification Eurographics 2006

Pre-Integrated Classification REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

Pre-Integrated Classification REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006

REAL-TIME VOLUME GRAPHICS Klaus Engel Siemens AG, Erlangen, Germany Eurographics 2006