> For the complete documentation index, see [llms.txt](https://doc.ozforensics.com/oz-knowledge/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.ozforensics.com/oz-knowledge/guides/developer-guide/api/oz-api/basic-scenarios.md).

# Basic Scenarios

Liveness is checking that a person on a video is a real living person.

{% content-ref url="/pages/-MTZUjACUq06a6fPJAMb" %}
[Liveness](/oz-knowledge/guides/developer-guide/api/oz-api/basic-scenarios/liveness.md)
{% endcontent-ref %}

Biometry compares two or more faces from different media files and shows whether the faces belong to the same person or not.

{% content-ref url="/pages/-MTZX48cymRyhvE4R-k6" %}
[Biometry (Face Matching)](/oz-knowledge/guides/developer-guide/api/oz-api/basic-scenarios/biometry.md)
{% endcontent-ref %}

Best shot is an addition to the Liveness check. The system chooses the best frame from a video and saves it as a picture for later use.

{% content-ref url="/pages/-MTZXOEa5zs7gu5lPmrj" %}
[Best Shot](/oz-knowledge/guides/developer-guide/api/oz-api/basic-scenarios/liveness/best-shot.md)
{% endcontent-ref %}

Blacklist checks whether a face on a photo or a video matches with one of the faces in the pre-created database.

{% content-ref url="/pages/-MbH5WGw9\_eXoJrvuCvU" %}
[Collection (1:N) Check](/oz-knowledge/guides/developer-guide/api/oz-api/basic-scenarios/collection.md)
{% endcontent-ref %}


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