Histogram Scan
Histogram Scan
Use Histogram Scan to sweep through value ranges and reveal specific luminance slices. It is useful for animated mask reveals and precise band selection.
Availability
This node requires Pro.
Common uses
- Place channel nodes after generators and before final output shaping.
- Use histogram and levels tools to isolate useful ranges for masks.
Input ports
-
input -
Usually expects one image input, with optional secondary inputs for some nodes.
Output ports
-
out -
Outputs modified image or channel data for downstream processing.
Parameters
| Parameter | Type | Default | Range or values |
|---|---|---|---|
| Position | float | 0.5 | 0 to 1 |
| Contrast | float | 0.5 | 0 to 1 |
| Invert Position | bool | false | - |
Behavior
- These nodes remap values rather than creating major new structure.
- Channel operations are useful for converting outputs into mask-friendly ranges.
Common mistakes
- Stacking many remap nodes can flatten contrast unexpectedly.
- Watch channel assumptions when mixing grayscale and RGBA signals.