> 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/quality.md).

# Quality

What the Quality parameter checks in an uploaded image - positioning, lighting, resolution, occlusions - and the score it returns.

## About Parameter

This parameter evaluates image quality based on specific criteria tailored for needs of reliable skin analysis, such as face positioning, lighting, resolution, face and skin visibility, occlusions.

## Features

1. Works with 1 and 3 side facial images.

## Output

1. `score` — overall numerical rating (1-100) indicating image quality. 1 means poor quality, 100 means excellent quality. Good quality images typically have a score > 70
2. Face and Skin Detection
   1. `has_face` — Boolean indicating if a face is detected in the image
   2. `has_enough_skin` — Boolean indicating whether enough skin area is visible for analysis (15% of the face-aligned image must contain skin)
   3. Head Position and Focus
      1. `has_valid_pose` — Boolean indicating if head pose is within acceptable parameters
      2. `has_good_resolution` — Boolean indicating if face resolution meets quality standards (at least one dimension exceeds 1024 pixels; for best results, we suggest to use images with at least 2K×2K face resolution to detect majority of visible pores)
      3. `has_no_blur` — Boolean indicating if image is free from motion blur
   4. Occlusion Detection
      1. `has_no_occlusions` — Boolean indicating if face is unobstructed
      2. `has_no_eyeglasses` — Boolean indicating absence of eyeglasses
      3. `has_no_hair_bangs` — Boolean indicating hair isn't covering forehead
   5. Lighting Quality
      1. `has_good_exposure` — Boolean indicating proper image exposure
      2. `has_uniform_illumination` — Boolean indicating even lighting across the face
      3. `has_no_shadows` — Boolean indicating absence of harsh shadows

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{% endhint %}

***

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