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# init(fromDictionaryRepresentation:)

Initializes a portrait effects matte instance from auxiliary image information in an image file.

```
convenience init(fromDictionaryRepresentation imageSourceAuxDataInfoDictionary: [AnyHashable : Any]) throws
```

## Parameters

`imageSourceAuxDataInfoDictionary`

A dictionary of information related to primitive portrait effects matte; obtained from <doc://com.apple.documentation/documentation/ImageIO/CGImageSourceCopyAuxiliaryDataInfoAtIndex(_:_:_:)>.

## Discussion

When using the <doc://com.apple.documentation/documentation/ImageIO> API to read from a HEIF or JPEG file containing a portrait effects matte, you can create an [`AVPortraitEffectsMatte`](/documentation/AVFoundation/AVPortraitEffectsMatte) object from the result of <doc://com.apple.documentation/documentation/ImageIO/CGImageSourceCopyAuxiliaryDataInfoAtIndex(_:_:_:)>. This function returns a <doc://com.apple.documentation/documentation/CoreFoundation/CFDictionary> of primitive map information.

---

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