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CS448f: Image Processing For Photography and Vision

CS448f: Image Processing For Photography and Vision. Tone Mapping. So far. So far. Tone Mapping. Some Images have too much dynamic range to display on a slide: (belgium.hdr). Recall Sharpening. Input = Coarse + Fine. Tone Mapping. Input = Coarse + Fine.

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CS448f: Image Processing For Photography and Vision

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  1. CS448f: Image Processing For Photography and Vision Tone Mapping

  2. So far

  3. So far

  4. Tone Mapping • Some Images have too much dynamic range to display on a slide: • (belgium.hdr)

  5. Recall Sharpening Input = Coarse + Fine

  6. Tone Mapping Input = Coarse + Fine

  7. Tone Mapping Output = Coarse + Fine

  8. Tone Mapping Output = Coarse + Fine Tons of strong detail in the bright regions, not enough in the dark regions

  9. Tone Mapping Input = Coarse x Fine

  10. Tone Mapping Log(Input) = Log(Coarse) + Log(Fine)

  11. Tone Mapping Log(Output) = Log(Coarse)+ Log(Fine)

  12. How should we make the coarse layer?

  13. Input

  14. Coarse

  15. Fine

  16. Input

  17. Exp(Log(Coarse)*0.7 + Log(Detail))

  18. Exp(Log(Coarse)*0.5 + Log(Detail))

  19. Exp(Log(Coarse)*0.3 + Log(Detail))

  20. Conclusion: • You can use a bilateral for tonemapping • It’s highly parameter-sensitive • Results aren’t great • What’s better? • Not much.

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