Luminance HDR User Manual — Tonemapping operators reference — Pattanaik

## Pattanaik

The implementation of a tone mapping operator as described in:

Time-Dependent Visual Adaptation for Realistic Image Display. S.N. Pattanaik, J. Tumblin, H. Yee, and D.P. Greenberg. In Proceedings of ACM SIGGRAPH 2000.

This operator requires properly calibrated image data (in cd/m2) and its results should be gamma corrected.

The local version of this operator is based on the following paper:

Adaptive Gain Control For High Dynamic Range Image Display. S.N. Pattanaik, H. Yee. In proceedings of SCCG 2002.

### OPTIONS

Multiplier

  Multiply input values by a multiplier value. Useful if input data is not calibrated. Default value: 1.0

Local Tone Mapping

  Use local version of the tone mapping. Time-dependent effects are cancelled while using local version, global version is used by default.

Cone Level

  Set the adaptation level for cones. By default, the adaptation level is calculated as a logarithmic average of luminance in the input image.

Rod Level

  Set the adaptation level for rods. By default, the adaptation level is calculated as a logarithmic average of luminance in the input image.