P1253297744ywPDG

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Rendering from CompressedHigh Dynamic Range
Textures on Programmable Graphics Hardware
Lvdi Wang1 Xi Wang1,3 Peter-Pike Sloan2Li-Yi
Wei1 Xin Tong1 Baining Guo11Microsoft
Research Asia2Microsoft Corporation3Bungie
Studio
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Introduction

• HDR images are gaining popularity in games
• Environment maps, etc
• Unfortunately, they are also large
• No adequate HDR compression format for current
  generation GPU yet

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Previous Work

• Emphasize that none of these provide satisfactory
  answers for currently available hardware (DX9,
  DX10, and game consoles)

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Our Contribution

• A compressed HDR format implement-able on DX9
  level hardware
• Advantages
• Small storage 1 HDR texture ? two DXT5 textures
• High quality
• Fast decompression using pixel program and native
  hardware texture filtering

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Our Approach(will contain multiple slides)

• Section 3 of our paper
• Start with Figure 1
• Emphasize the major idea how to represent
  floating point quantities into several
  fixed-point intervals.
• Put our Figure 2 here, but rid of that white
  background.

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Design Decision(another option is to splice
these slides with the algorithm portion)

• Section 4 of our paper
• Color space
• Texture format
• Residual computation
• Codec

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Quantization Range and Precision(Explain why)
original
2x6 bit
1x12 bit
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Why Residual?
residual on
residual off
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Residual Computation(provide intuitive
explanation of why)
residual ratio
original
residual
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Codec
NV DXT
original
ours
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Results

• Essentially Table 2 and Figure 6, but instead of
  a big table that is difficult to read for a
  presentation, use plots.

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Environment Map Rendering(Ought to show life
demo and also zooming in on differences)
FP16 366 fps
Our LUVW 482 fps
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Quality Comparison Big Fog(Might be better to
show .pfm images and change exposures
side-by-side)
original
our result
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Quality Comparison Memorial
original
our result
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Conclusions and Future Work
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Acknowledgements

• Qiang Meng and Xianyou Hou
• Help on coding and experiments
• Anonymous reviewers
• Especially the one providing more efficient
  shader

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Thank You!
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(No Transcript)