HueKeyer node

This documentation is for version 1.0 of HueKeyer.

Description

Compute a key depending on hue value.

Hue and saturation are computed from the the source RGB values. Depending on the hue value, the various adjustment values are computed, and then applied:

amount: output transparency for the given hue (amount=1 means alpha=0).

sat_thrsh: if source saturation is below this value, the output transparency is gradually decreased.

Inputs

Input Description Optional
Source   No

Controls

Parameter / script name Type Default Function
Hue Curves / hue Parametric amount:   sat_thrsh:
Hue-dependent alpha lookup curves:
amount: transparency (1-alpha) amount for the given hue
sat_thrsh: if source saturation is below this value, transparency is decreased progressively.