# Searching faces in a collection

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This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/amazon-rekognition-developer-guide.git)
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## Tagging collections

* **Note**\
  If you do not know the collection's Amazon Resource Name, you can use the `DescribeCollection` operation.

## Adding faces to a collection

* **Note**\
  `DetectFaces` returns the same information, so you don't need to call both `DetectFaces` and `IndexFaces` for the same image.
* **Note**\
  To use quality filtering, you need a collection that's associated with version 3, or higher, of the face model. To get the version of the face model associated with a collection, call [DescribeCollection](https://docs.aws.amazon.com/rekognition/latest/APIReference/API_DescribeCollection.html).

## Searching for a face (image)

* **Note**\
  If the service detects multiple faces in the input image, it uses the largest face that's detected for searching the face collection.