Curves
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Curves is a Colour effect.
What it does
Section titled “What it does”Adjust the brightness against brightness values. You can view this as inputting brightness into a function which outputs a different brightness based on the curve you set.
Parameters
Section titled “Parameters”| Parameter | Control | Range | Default | Unit |
|---|---|---|---|---|
| Master | Curve | 2 to 16 points in the unit square | The identity diagonal | - |
| Red | Curve | 2 to 16 points in the unit square | The identity diagonal | - |
| Green | Curve | 2 to 16 points in the unit square | The identity diagonal | - |
| Blue | Curve | 2 to 16 points in the unit square | The identity diagonal | - |
| Alpha | Curve | 2 to 16 points in the unit square | The identity diagonal | - |
| Mix | Slider | 0 to 100 | 100 | Per cent |
| Blend | Dropdown | Normal · Darken · Multiply · Colour burn · Linear burn · Darker colour · Add · Lighten · Screen · Colour dodge · Lighter colour · Overlay · Soft light · Hard light · Linear light · Vivid light · Pin light · Hard mix · Difference · Exclusion · Subtract · Divide · Hue · Saturation · Colour · Luminosity | Normal | - |
| Matte | Layer | Any layer in the composition | None | - |
| Invert | Checkbox | On or off | Off | - |
| Channel | Dropdown | Luminance · Alpha · Red · Green · Blue | Luminance | - |
In the Effect Controls panel:
- Matte is an input to an effect, scaling the strength. Invert inverts the mattes for calculating strength.
What each control does
Section titled “What each control does”- The interface can be used to directly alter the curve.
- Black, Shadows, Midtones, Highlights and White are the channel’s curve outputs at inputs 0, 0.25, 0.5, 0.75 and 1.
- Master applies to all three channels, while Red, Green and Blue apply to individual channels.
- Mix: how much of the result replaces the original.
- Matte and Invert drive the strength of the effect from another layer’s brightness; see Effects.