> 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/developers/saas-api-overview/api-for-hair-metrics-2.0/deprecated-version-1.0/hair-curliness.md).
# Hair Curliness
Haut.AI provides an AI algorithm that estimates hair curliness. Response scheme for the deprecated Hair Metrics 1.0.
## **Description**
Hair type and texture are determined by genetics and environment. Hair texture can change with age. The oil glands in the scalp also shrink with age. How you treat and style your hair can change its texture. The most common hair type across the world is straight hair.
**`"algorithm_tech_name": "hair_curliness"`**
## `area_name`
The algorithm returns metrics for the following area:
* `hair`
## `main_metric`
The main metric indicates the hair curliness category for `area_name`
```javascript
"main_metric": {
"value": "Straight",
"widget_type": "category",
"name": "Hair Curliness",
"tech_name": "hair_curliness",
"widget_meta": null
},
```
* **`value`** of hair curliness is divided into four classes, as listed below. Each category gets its own confidence level in the range of `[0,100]`, where the highest score indicates the hair curliness class:
* `Straight`
* `Wavy`
* `Curly`
* `Kinky`
* `"widget_type": "category"`
* `"name": "Hair Frizziness"`
* `"tech_name": "hair_frizziness"`
## `sub_metrics`
The algorithm returns two types of sub-metrics - `Curliness Confidence`,`Hair Curliness Score`.
```javascript
"sub_metrics": [
{
"value": 87,
"widget_type": "density",
"name": "Curliness Confidence",
"tech_name": "curliness_confidence",
"widget_meta": null
},
{
"value": 10,
"widget_type": "density",
"name": "Hair Curliness Score",
"tech_name": "hair_curliness_score",
"widget_meta": null
},
]
```
* **`Curliness Confidence`** evaluates curliness confidence level
* **`value`** of the curliness confidence score ranges from `[0,100]`*. A higher score is associated with higher hair curliness*
* `"widget_type": "density"`
* `"name": "Curliness Confidence"`
* `"tech_name": "curliness_confidence"`
* **`Hair Curliness Score`** evaluates curliness confidence level
* **`value`** of the curliness confidence score ranges from `[0,100]`*. A higher score is associated with higher hair curliness*
* `"widget_type": "numeric"`
* `"name": "Curliness Confidence"`
* `"tech_name": "curliness_confidence"`
## `masks_restored`
**None** **-** there are no restored masks for hair curliness
## `masks_original`
**None** **-** there are no original masks for hair curliness
## **Example (JSON)**
{% file src="/files/-MgFVGH9XkW1-j1LPnZ1" %}
***
{% hint style="warning" %}
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{% endhint %}
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