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``` git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash ``` Closes #11925
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| title | description | categories | keywords | action | toc | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| images.Sigmoid | Returns an image filter that changes the contrast of an image using a sigmoidal function. |
|
true |
This is a non-linear contrast change useful for photo adjustments; it preserves highlight and shadow detail.
The midpoint is the midpoint of contrast. It must be in the range [0, 1], typically 0.5.
The factor indicates how much to increase or decrease the contrast, typically in the range [-10, 10] where 0 has no effect. A positive value increases contrast, while a negative value decrease contrast.
Usage
Create the filter:
{{ $filter := images.Sigmoid 0.6 -4 }}
{{% include "functions/images/_common/apply-image-filter.md" %}}
Example
{{< img src="images/examples/zion-national-park.jpg" alt="Zion National Park" filter="Sigmoid" filterArgs="0.6,-4" example=true
}}