The Intensity Transform command adjusts pixel intensities using a configurable mathematical transformation.
Parameters
| Parameter | Description |
|---|
| Mode | The transform to apply (see below) |
| Contrast | Multiplicative scaling factor applied after the mode transform |
| Brightness | Additive offset applied after scaling |
| Mode | Description |
|---|
| Linear | output = contrast × input + brightness — simple gain/offset adjustment |
| Logarithmic | output = contrast × log(input + 1) + brightness — compresses bright regions; expands dark regions |
| Square root | output = contrast × sqrt(input) + brightness — moderate compression of bright regions |
When to use
- Linear — correct for systematic over/under-exposure across a batch.
- Logarithmic — useful when signal spans several orders of magnitude (e.g. very dim and very bright objects in the same image).
- Square root — a milder alternative to log when the intensity range is not extreme.