> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/features/features/sharpening.md).

# Sharpening

Local sharpening that enhances fine detail in textured areas (foliage, fabric, hair) while preserving smooth regions (sky, skin).

## Example

{% columns %}
{% column %}
**Before**

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-2aac38d3a6989f640b75c2aeecf11934ec13a3c3%2Fplaceholder.svg?alt=media" alt="Before — Sharpening"><figcaption></figcaption></figure>
{% endcolumn %}

{% column %}
**After**

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-2aac38d3a6989f640b75c2aeecf11934ec13a3c3%2Fplaceholder.svg?alt=media" alt="After — Sharpening"><figcaption></figcaption></figure>
{% endcolumn %}
{% endcolumns %}

## Parameters

<table><thead><tr><th width="188.800048828125">Parameter</th><th width="100">Section</th><th width="95">Value</th><th width="95">Default</th><th>Description</th></tr></thead><tbody><tr><td><code>SHPmode</code></td><td><code>Config</code></td><td>0, 1</td><td>1</td><td>Mode selection (see below)</td></tr><tr><td><code>shplocalstrength</code></td><td><code>Gpars</code></td><td>0.0 – 1.0</td><td>0.5</td><td>Local sharpening strength (textured regions)</td></tr><tr><td><code>shpglobalstrength</code></td><td><code>Gpars</code></td><td>0.0 – 1.0</td><td>0.0</td><td>Global sharpening strength</td></tr></tbody></table>

{% hint style="warning" %}
`shpglobalstrength` is a manual correction: it is static and applied **at the end** of automatic processing, regardless of the analysis result. Adjust carefully — it can override otherwise correct automatic behavior. (`shplocalstrength` is automatic.)
{% endhint %}

## Modes

| Value           | Description               |
| --------------- | ------------------------- |
| **0** — Off     | No sharpening             |
| **1** — Enabled | Standard local sharpening |

{% hint style="success" %}
**Recommended:** Keep enabled (mode 1) at the default local strength of 0.5. Leave global sharpening at 0 unless an image looks soft overall — it can introduce halos at high-contrast edges.
{% endhint %}


---

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