Remap Color

The Remap Color tool lets you view High Dynamic Range (HDR) images on a limited dynamic range display, such as a computer monitor. You can also use the Remap Color tool as a 1D LUT tool to remap an image's color output using interactive histogram and color curve tools.

For more information on 1D LUTs, see Applying LUTs.

To remap the color of an image:

1. From the Tools tab, drag the Remap Color tool from the Color Correction folder to the dependency graph in the Schematic view.
   
2. From the Remap Color UI, select a mode in which to remap the color:
   • Linear: Maps a given range of the input values to the output interval. You can specify which luminance value in the input maps to black and which one maps to white. In this mode, you can click the Clamp button to have the curve defined by constant output values outside the level range. Otherwise, the straight line between black and white is interpolated for the entire range.
   • EXRDisplay: Popular among Open EXR users, compresses a large portion of the high dynamic range into the gamut of the display without introducing clamping artifacts.
   
3. Under Output Depth, set the depth at which you want to output the image.
   
4. In the Remap Color UI, adjust the parameters for the mode you selected:

   Mode:	Use:	To:
   Linear	In Min and In Max	Set the minimum and maximum input color values in the image.
   Out Min and Out Max	Set the minimum and maximum output color values in the image.
   Gamma	Set the gray values. Increase to brighten and decrease to darken.
   EXRDisplay	Exp	Set the exposure of the image. You can lighten or darken the image to reveal detail in the high or low end.
   Defog	Compensate for fogging due to stray light in the recording device.
   Knee Low and Knee Hi	Set the white level of the image, which determines which value is mapped to the maximum intensity of the display.
   Gamma	Set the gray values. Increase to brighten and decrease to darken.