---
title: VNDetectFaceCaptureQualityRequest
framework: vision
role: symbol
role_heading: Class
path: vision/vndetectfacecapturequalityrequest
---

# VNDetectFaceCaptureQualityRequest

A request that produces a floating-point number that represents the capture quality of a face in a photo.

## Declaration

```swift
class VNDetectFaceCaptureQualityRequest
```

## Overview

Overview This request produces or updates a VNFaceObservation object’s property faceCaptureQuality with a floating-point value. The value ranges from 0 to 1. Faces with quality closer to 1 are better lit, sharper, and more centrally positioned than faces with quality closer to 0. If you don’t execute the request, or the request fails, the property faceCaptureQuality is nil.

## Topics

### Accessing the Results

- [results](vision/vndetectfacecapturequalityrequest/results.md)
- [VNFaceObservation](vision/vnfaceobservation.md)

### Identifying Request Revisions

- [VNDetectFaceCaptureQualityRequestRevision2](vision/vndetectfacecapturequalityrequestrevision2.md)
- [VNDetectFaceCaptureQualityRequestRevision1](vision/vndetectfacecapturequalityrequestrevision1.md)

## Relationships

### Inherits From

- [VNImageBasedRequest](vision/vnimagebasedrequest.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [VNFaceObservationAccepting](vision/vnfaceobservationaccepting.md)

## See Also

### Face and body detection

- [Selecting a selfie based on capture quality](vision/selecting-a-selfie-based-on-capture-quality.md)
- [VNDetectFaceLandmarksRequest](vision/vndetectfacelandmarksrequest.md)
- [VNDetectFaceRectanglesRequest](vision/vndetectfacerectanglesrequest.md)
- [VNDetectHumanRectanglesRequest](vision/vndetecthumanrectanglesrequest.md)
- [VNHumanObservation](vision/vnhumanobservation.md)