This node applies a tone mapping process to an image. This is often used to convert high dynamic range images to a colour space suitable for output; to convert linear space images to gamma 2.2 for output; or to balance brightness levels across an image and adapt them over time, to mimic the behavior of camera lenses and eyes. A number of standard tone mapping operators are supported.
| Tone Map Mode
|| The method used for tone mapping.
- Direct (Pass Throguh Linear), Leave the images unchanged.
- Linear To Gamma, Convert from linear colour space to gamma 2.2.
- Reinhard, Perform tonemapping with the Reinhard operator.
- Filmic, Perform tonemapping with the Filmic operator.
- Max White, Tone map the image by scaling down brightness by the brightest pixel value.
- Linear-Camera, Perform tone mapping from linear space using a camera exposure model using the parameter controls.
- AutoLinear-Camera, Perform tone mapping from linear space using a camera exposure model which automatically determines the parameters based on the input image and exposure setting.
- Preserve Contrast, Perform tone mapping using an operator that attempts to preserve contrast in the image.
| Adaption Rate
|| The rate of adaption when moving from bright to dark areas and vice versa, used to mimic real eye and camera behaviours. When moving from a dark to a light area eyes take time to adapt, so at first the light area appears excessively bright.
|| The exposure, for camera-based operators.
| ISO (Sensitivity)
|| The ISO, for camera-based operators.
|| The F/stop, for camera-based operators.
|| The desired gamma of the target output image – usually 2.2.
||Typical Node Input
|| Turn the effect on or off. Values < 0.1 will turn the effect off, and deferred rendering must be on.
There are no outputs from this node.