Reverse tone mapping

under construction...

Reverse Tone Mapping for LDR to HDR Images

}How to display LDR image to HDR display screen?

}Dodging and Burning: inspired bothTM and iTM;

}Dodging: blocking light from some image areas while illuminating others;

}HDR companding [Li, Siggraph’05]: compress the contrast through tone mapping, then expand it;

}Linear contrast scaling [Akyues, Siggraph’07]: a global expansion method;

}Inverse tone mapping [Banterle, SCCG’08]:

}Map LDR to middle dynamic range;

}Find saturated areas by median cut, create expand map from density estimate;

}Reconstruct lost luminance by interpolation (weights);

}Attenuate artifacts by cross bilateral filtering (luminance-expand map).

}Reverse tone mapping [Rempel, Siggraph’07]: similar to iTM.

}Inverse gamma and noise filter for contrast stretching;

}Smooth brightness and edge stopping for enhancement of saturated regions.