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xRobert Richmond

Light Field Mapping

September 2001

Page Three

Page One: Applications of Light Field Mapping
Synthetic Imaging
Real-World Imaging
Technical Analysis
Page Four: Triangle Centered Approximation
Triangle-Centered Light Field Mapping
Analysis of Triangle-Centered Approximation
Page Two: Data Acquisition
Resampling and Normalization
Page Five: Vertex-Centered Approximation
Vertex-Centered Light Field Mapping
Analysis of Vertex-Centered Approximation
Page Three: Surface Light Field Approximation Page Six: Hardware Acceleration
Light Field Map Compression
Final Thoughts

Surface Light Field Approximation

Once the radiance data is processed, the derivative surface light map must be correlated to the basic surface primitives.  This method allows the light map to best represent each viewing direction with minimal loss of detail.

The earlier described resampling process is utilized to build substituted data elements for each surface primitive.

The formula must now be decomposed into a matrix format to best describe lighting variances from multiple viewing directions within a specified time-frame.

The formula can now be decomposed and truncated after a variable numbers of terms in-order to form two dimensional textures.

Since the textures can now be defined, the corresponding surface light maps can be derived through approximation.  One approximation term is equivalent to the additive manipulation of one surface map plus one view map.  The actual representative process of approximation cab derived through either triangle-centered or vertex-centered operations.

Page Four . . .


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