Chroma Keying and Working with Green Screens > Refining Your Key > Adjusting the Luminance of the Key >

# Remapping Black and White

Use the Output levels in the 2D Histogram node in the schematic to remap the luminance values for black (0) and white (255). You can brighten the dark areas of the matte or darken the white areas.

(a) Minimum Output level(b) Maximum Output level

## Brightening the Matte

The Minimum Output level sets the luminance value of all black (0) pixels in the matte. Black pixels in the matte are mapped to the luminance value set by the Minimum Output level.

You can set the Minimum Output level by dragging the black triangle, or by setting the value in the Minimum Output Level field.

The matte before adjusting the Output levels | The matte after lowering the Minimum Output level

## Darkening the Matte

The Maximum Output level sets the luminance value of all white (255) pixels in the matte. White pixels in the matte are mapped to the luminance value set by the Maximum Output level.

You can set the Maximum Output level by dragging the white triangle or by setting the value in the Maximum Output Level field.

The matte before adjusting the Output levels | The matte after lowering the Maximum Output level

#### Related Information

- Adjusting the Luminance of the Key
- Chroma Keying and Working with Green Screens