Tonemapping
Fattal et al. 2002 Tone Mapping
Adapt an image, which may have a high dynamic range, for presentation using a low dynamic range. This operator attenuates the magnitudes of local image gradients, producing luminance within the range 0.0-1.0. This tonemapping approach was originally presented by Raanan Fattal, in the 2002 SIGGRAPH paper: Gradient Domain High Dynamic Range Compression.
Operation pads
This operation exposes the following data pads, defining how it receives, processes, and emits image data:
Input
Output
Operation properties
Alpha
gdouble
Gradient threshold for detail enhancement.
Default
Value range
Default
1.00Value range
0.00 • • 2.00.Beta
gdouble
Strength of local detail enhancement.
Default
Value range
Default
0.90Value range
0.10 • • 2.00.Saturation
gdouble
Global color saturation factor.
Default
Value range
Default
0.80Value range
0.00 • • 1.00.Noise
gdouble
Gradient threshold for lowering detail enhancement.
Default
Value range
Default
0.00Value range
0.00 • • 1.00.Make Seamlessly tileable
Make the input buffer seamlessly tileable. The algorithm is not content-aware, so the result may need post-processing.
Mantiuk 2006 Tone Mapping
Adapt an image, which may have a high dynamic range, for presentation using a low dynamic range. This operator constrains contrasts across multiple spatial frequencies, producing luminance within the range 0.0-1.0.