Dynamic Range Compression - PowerPoint PPT Presentation

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Dynamic Range Compression

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BCS and CSAIL, MIT Companding (compress and expand) Compress HDR to LDR and expand to HDR Dynamic Range Compression Companding (compress and expand) ... – PowerPoint PPT presentation

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Title: Dynamic Range Compression


1
Dynamic Range Compression
How to display HDR image on 8 bit monitor?
Too bright
  • Multiscale methods
  • gave halos.

Too dark
  • We cured the halos.

Secret ingredients Wavelet transforms and
smooth gain maps.
Yuanzhen Li, Lavanya Sharan, Edward Adelson BCS
and CSAIL, MIT
2
Companding (compress and expand)
  • Compress HDR to LDR and expand to HDR

Compress
LDR, stored as JPEG
HDR, original
HDR, retrieved
Expand
Yuanzhen Li, Lavanya Sharan, Edward Adelson BCS
and CSAIL, MIT
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