DocumentationSubstance 3D

Histogram equalize

Last update: Thu Feb 26 2026 00:00:00 GMT+0000 (Coordinated Universal Time)

Histogram equalize: icon {width="200px"}

In: Filters > Adjustments

Description

Equalizes the histogram for a grayscale image, effectively adjusting the grayscale values aiming for an equal distribution.

Output connectors

Parameters

Input connectors

Input Grayscale PRIMARY
The image for which the histogram should be equalized.

Output connectors

Output Grayscale
The result image with histogram equalization applied.

Parameters

Histogram resolution Integer
The width of the histogram. A higher value allows for a finer value distribution.   Available resolutions are, in pixels: 256, 512, 1024, 2048, 4096
Histogram smoothing Float
The histogram may be smoothed by redistributing the grayscale values in the image to equalize the  difference  between each value.   This parameter adjusts the intensity of that smoothing.

Examples

histogram_equalize_example_1_before
Before
histogram_equalize_example_1_after
After

Histogram equalize: Example 1 {modal="regular"}

histogram_equalize_example_2_before
Before
histogram_equalize_example_2_after
After

Histogram equalize: Example 2 {modal="regular"}

histogram_equalize_example_4_before
Before
histogram_equalize_example_4_after
After

Histogram equalize: Example 3 {modal="regular"}

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