> 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-face-metrics-2.0/hydration.md).

# Hydration Result Scheme

Result scheme for the Hydration algorithm in Face Metrics 2.0: the area, main metric, sub-metric, and mask fields, with a JSON example.

## Description

{% content-ref url="/pages/8X3VKz7tm5W9SlJTGtFc" %}
[Hydration Algorithm (experimental)](/haut.ai/haut.ai-features/algorithms/face-metrics-2-0/hydration-algorithm-experimental.md)
{% endcontent-ref %}

## `algorithm_tech_name`

`Hydration`

## `area_name`

The algorithm returns metrics and sub-metrics for the following facial areas:

* `face`

## `main_metric`

The main metric is an overall score indicating hydration for each `area_name`

```javascript
"main_metric": {
                "value": 50,
                "widget_type": "bad_good_line",
                "name": "Hydration Score",
                "tech_name": "hydration_score",
                "widget_meta": null
            },
```

* **`value`** the hydration score ranges in `[0,100]`
* The score can be classified into six classes based on `value`:
  * `(90,100]` - Excellent
  * `(80,90]` - Great
  * `(70,80]` - Good
  * `(50,70]` - Average
  * `(30, 50]` - Poor
  * `[0,30]` - Bad
* `"widget_type": "bad_good_line"` indicates that a higher value is better
* `"name": "Hydration score"`
* `"tech_name": "hydration_score"`

## `sub_metrics`

```javascript
"sub_metrics": [
                {
                    "value": "Mild Dehydration",
                    "widget_type": "category",
                    "name": "Hydration Level",
                    "tech_name": "hydration_level",
                    "widget_meta": null
                }
            ]
```

* **`value`** one of the following categories \[`'Severe Dehydration'`, `'Moderate Dehydration'`, `'Mild Dehydration'`, `'Normal Hydration'`]
* `"widget_type": "category"` indicates that `"value"` is a categorial
* `"name": "Hydration level"`
* `"tech_name": "hydration_level"`

## `masks_restored`

The algorithm returns a vectorized mask of dehydration (skin areas which suffers from a lack of water) for an restored image

* `"mask_type": "heatmap_mask"`
* `features`

  * geometry
    * `"type": "MultiPolygon"`

  See more on Masks [here](/haut.ai/haut.ai-features/algorithms/algorithm-results.md#masks)

## `masks_original`

The algorithm returns a vectorized mask of dehydration (skin areas which suffers from a lack of water) for an original image

* `"mask_type": "heatmap_mask"`
* `features`

  * geometry
    * `"type": "MultiPolygon"`

  See more on Masks [here](/haut.ai/haut.ai-features/algorithms/algorithm-results.md#masks)

## **Example (JSON)**

{% file src="/files/-McSlkwkMQcH7i90xgcw" %}
hydration.json
{% endfile %}

***

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

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