1 / 23

Advanced Volume Rendering Techniques with Three-Dimensional Textures

Explore in-depth rendering methods using texture mapping, shading, and gradient quantization for enhanced volume visualization. Learn about footprint evaluation, rendering algorithms, and footprint functions for improved results in volume rendering.

danielleh
Download Presentation

Advanced Volume Rendering Techniques with Three-Dimensional Textures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Direct Volume Rendering w/Shading via Three-Dimensional Textures

  2. Introduction • Intro • Limitations • Other methods

  3. Overview of Texture-Map • Initial step • Lookup table computation • Texture map processing

  4. Ambient Light • Calculation

  5. Reflecting Surface Classification • Calculation

  6. Reflected Light Component • Half-way vector specularity model • Lambertian diffuse shading

  7. Gradient Quantization • Quantize gradient direction • Unit Sphere • Tessellation

  8. Rendering Slices • Apply texture • Back to front ordering

  9. Texture Coords • Bounding cube • Transformation:

  10. Alternative Pipelines

  11. Results

  12. Footprint Evaluation for Volume Rendering

  13. Introduction • Forward-Mapping Algorithm • Overview

  14. Previous Work • Ray tracing • Compositing techniques • Fitting surfaces into data cells

  15. Rendering Algorithm • Differences from original algorithm • Algorithm breakdown • Transforming • Shading • Reconstruction • Visibility • Splatting

  16. Footprint Function • Calculate once for each view

  17. Generic Footprint Table • Spherical Kernel • Integration along the Z axis

  18. Extents and Mapping • Two cases

  19. Extents and Mapping (cont.) • Extent • Mapping • Ellipsoid defined as

  20. Table Sizes and Kernels • 3 Parameters • Size of the table • Space vs. Quality tradeoff • Accessibility of the table • Table’s underlying kernel

  21. Table Sizes and Kernels (cont.)

  22. Sample Images

  23. Sample Images (cont.)

More Related