> For the complete documentation index, see [llms.txt](https://docs.saas.haut.ai/haut.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.saas.haut.ai/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines.md).

# Lines

What the Lines parameter measures, the facial areas and line types it covers, and how to read the scores and grades it returns.

## About Parameter

The parameter estimates the visible presence and severity of lines (wrinkles) caused by the loss of natural moisture and elasticity of the skin, including the multiple fine and deep wrinkles, downward shifts of nasolabial and marionette folds.

## Features

1. Multi-area analysis: forehead, right eye area, left eye area, right cheek, left cheek, perioral area.
2. Multi-type line detection: fine lines, deep lines, forehead lines, lip lines, nasolabial wrinkles, marionette lines, glabellar lines, under-eye lines, crow's feet lines, and eye lines.
3. Works with 1 and 3 side facial images.

## Output

1. Score from 1 to 100.
2. Grade from 1 to 5.
3. Algorithm-assigned skin condition tag (Great, Good, Average, Poor).
4. Length of lines.
5. Number of lines.
6. Vector mask for detected features.

## Scores & Grades Description

<table><thead><tr><th width="119.73828125">Score value</th><th width="120.359375">Grade value</th><th width="360.046875">Description</th><th>Tags</th></tr></thead><tbody><tr><td>100-90</td><td>1</td><td>Subtle signs of fine lines</td><td>Great</td></tr><tr><td>89-80</td><td>2</td><td>Multiple fine lines or a few deep lines</td><td>Good</td></tr><tr><td>50-79</td><td>3</td><td>Presence of both deep and fine lines</td><td>Average</td></tr><tr><td>30-49</td><td>4</td><td>Presence of severe deep lines</td><td>Poor</td></tr><tr><td>&#x3C;30</td><td>5</td><td>Presence of severe deep lines</td><td>Poor</td></tr></tbody></table>

## Related Advanced Parameters

{% hint style="warning" %}
**Disclaimer**

By default, advanced parameters in Face Skin Analysis 3.0 are not available and are only displayed when the advanced parameters option is enabled. Please contact your account manager to activate this feature.
{% endhint %}

* [Deep Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/deep-lines.md)
* [Fine Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/fine-lines.md)
* [Forehead Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/forehead-lines.md)
* [Lip Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/lip-lines.md)
* [Glabellar Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/glabellar-lines.md)
* [Nasolabial Wrinkles](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/nasolabial-wrinkles.md)
* [Marionette Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/marionette-lines.md)
* [Under Eye Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/under-eye-lines.md)
* [Crow's Feet Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/crow-s-feet-lines.md)
* [Eye Lines](/haut.ai/haut.ai-features/algorithms/face-skin-analysis-3-0/lines/eye-lines.md)

***

## Algorithm API

{% hint style="warning" %}
API access is available only for <mark style="color:purple;">**Professional**</mark> plan clients
{% endhint %}

See [Lines Parameter Result Scheme](/haut.ai/developers/saas-api-overview/api-for-face-skin-analysis-3.0/lines.md).

***

{% hint style="warning" %}
Not a Haut.AI client yet?
{% endhint %}

<a href="https://haut.ai/book-a-demo?utm_source=referral&#x26;utm_medium=saas_docs&#x26;utm_campaign=Docs_SaaS_HautAI" class="button primary" data-icon="user-vneck">Book a demo</a> <a href="https://haut.ai/product/face-skin-analysis?utm_source=referral&#x26;utm_medium=saas_docs&#x26;utm_campaign=Docs_SaaS_HautAI" class="button secondary" data-icon="external-link">Face Skin Analysis 3.0 on haut.ai</a>


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