Histogram Threshold
Updated: 5 Jun 2026
A thresholding process based on the percentage of pixels rather than their intensity. Example .dfx
Histogram Threshold
Method #
A thresholding process based on the percentage (brightness) of pixels rather than their intensity.
Can be used to generate a mask based on the ‘Luminance’ of the input.
Parameters
These properties control the core behaviours of the node.
Parameter Details Active
Enables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance.
Blend Amount
Changes the opacity of the new effect over the original image.
Blend Mode (RGB)
Change how the generated effect blends with the parent image RGB.
- Solid : The effect is not blended with the scene.
- Blend : The effect is blended with the scene using the Alpha Channel.
- Additive : The effect is ‘Added’, brightening the scene where the effect is applied.
- Subtractive : The effect is ‘Subtracted’, darkening the scene where the effect is applied.
- Multiply : The effect is ‘Multiplied’, darkening the scene based on the effect’s colour.
- Max : The effect is ‘Maxed’, taking the maximum value between the effect and the scene.
- Min : The effect is ‘Min’d’, taking the minimum value between the effect and the scene.
- Screen : The effect is ‘Screened’, brightening the scene based on the effect’s colour.
- Light : The effect is ‘Light’, brightening the scene based on the effect’s colour.
- Pre-Mul Blend : The effect is blended with the scene before the Alpha Channel is applied.
- Difference : The effect is ‘Differenced’, creating a high-contrast effect based on the difference between the effect and the scene.
- Exclusion : The effect is ‘Excluded’, creating a low-contrast effect based on the exclusion of the effect from the scene.
- Dodge : The effect is ‘Dodged’, brightening the scene based on the effect’s colour.
- Burn : The effect is ‘Burned’, darkening the scene based on the effect’s colour.
- Negate : The effect is ‘Negated’, brightening the scene based on the inverse of the effect’s colour.
- Overlay : The effect is ‘Overlaid’, combining the effect and the scene based on the effect’s colour.
Threshold
Controls the threshold value used to determine which pixels are affected.
Mode
The mode determines how the effect is applied based on the threshold.
- Below : The effect is applied to pixels below the threshold.
- Above : The effect is applied to pixels above the threshold.
Output Mode
The output mode determines the format of the output image.
- Colour : The output contains the original colours of the image.
- Mask : The output is a mask image.
The properties control the time at which the node is active. See Timeline for editing time segments.
Parameter Details Duration
Control the duration of the node’s time segment.
- Composition Duration : Use the length of the composition for the node’s time segment duration.
- Custom : Set a custom duration for the node’s time segment.
Node Time
The custom start and end time for the node.
Duration (Timecode)
The length of the node’s time segment (in time).
Duration (Frames)
The length of the node’s time segment (in frames).
Time Segment Enabled
Set whether the node’s time segment is enabled or not in the Timeline.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Active | Enables or disables the effect. Disabling the effect means it will no longer compute, so disabling a node when not in use can improve performance. |
| Blend Amount | Changes the opacity of the new effect over the original image. |
| Blend Mode (RGB) |
Change how the generated effect blends with the parent image RGB.
|
| Threshold | Controls the threshold value used to determine which pixels are affected. |
| Mode |
The mode determines how the effect is applied based on the threshold.
|
| Output Mode |
The output mode determines the format of the output image.
|
The properties control the time at which the node is active. See Timeline for editing time segments.
| Parameter | Details |
|---|---|
| Duration |
Control the duration of the node’s time segment.
|
| Node Time | The custom start and end time for the node. |
| Duration (Timecode) | The length of the node’s time segment (in time). |
| Duration (Frames) | The length of the node’s time segment (in frames). |
| Time Segment Enabled | Set whether the node’s time segment is enabled or not in the Timeline. |
There are no inputs for this node.