2017

Table Of Contents
represents the range of luminance values in the matte and spans from 0 (black) to 255 (white). The vertical
axis shows the number of pixels at each luminance value.
Setting the Range of the Luminance Values
Use the List and Gain fields with the Input Level controls, in the 2D Histogram node in the schematic, to
set the range of luminance values in the matte. You can darken black areas of the matte or remove grey from
white areas of the matte.
(a) Minimum Input level (b) Maximum Input level
Removing Grey from the Black Areas of the Matte
The Minimum Input level sets the start of the range of luminance values. Pixels with luminance values below
the Minimum Input level are mapped to black (0).
702 | Chapter 16 Chroma Keying and Working with Green Screens