---
title: "VNNormalizedFaceBoundingBoxPointForLandmarkPoint(_:_:_:_:)"
framework: vision
role: symbol
role_heading: Function
path: "vision/vnnormalizedfaceboundingboxpointforlandmarkpoint(_:_:_:_:)"
---

# VNNormalizedFaceBoundingBoxPointForLandmarkPoint(_:_:_:_:)

Returns the coordinates of a specified face landmark point, in bounding box coordinates.

## Declaration

```swift
func VNNormalizedFaceBoundingBoxPointForLandmarkPoint(_ faceLandmarkPoint: vector_float2, _ faceBoundingBox: CGRect, _ imageWidth: Int, _ imageHeight: Int) -> CGPoint
```

## Parameters

- `faceLandmarkPoint`: The location of the face landmark, as returned from a doc://Vision/documentation/Vision/VNFaceLandmarkRegion2D instance.
- `faceBoundingBox`: The normalized bounding box rect around the face, as obtained from a doc://Vision/documentation/Vision/VNFaceObservation instance.
- `imageWidth`: The width of the image from which the doc://Vision/documentation/Vision/VNFaceObservation instance was generated.
- `imageHeight`: The height of the image from which the doc://Vision/documentation/Vision/VNFaceObservation instance was generated.

## Return Value

Return Value The input point projected into normalized bounding box coordinates.

## See Also

### Coordinate conversion

- [VNImagePointForNormalizedPoint(_:_:_:)](vision/vnimagepointfornormalizedpoint(_:_:_:).md)
- [VNNormalizedPointForImagePoint(_:_:_:)](vision/vnnormalizedpointforimagepoint(_:_:_:).md)
- [VNImagePointForNormalizedPointUsingRegionOfInterest(_:_:_:_:)](vision/vnimagepointfornormalizedpointusingregionofinterest(_:_:_:_:).md)
- [VNNormalizedPointForImagePointUsingRegionOfInterest(_:_:_:_:)](vision/vnnormalizedpointforimagepointusingregionofinterest(_:_:_:_:).md)
- [VNImageRectForNormalizedRect(_:_:_:)](vision/vnimagerectfornormalizedrect(_:_:_:).md)
- [VNNormalizedRectForImageRect(_:_:_:)](vision/vnnormalizedrectforimagerect(_:_:_:).md)
- [VNImageRectForNormalizedRectUsingRegionOfInterest(_:_:_:_:)](vision/vnimagerectfornormalizedrectusingregionofinterest(_:_:_:_:).md)
- [VNNormalizedRectForImageRectUsingRegionOfInterest(_:_:_:_:)](vision/vnnormalizedrectforimagerectusingregionofinterest(_:_:_:_:).md)
- [VNNormalizedIdentityRect](vision/vnnormalizedidentityrect.md)
- [VNNormalizedRectIsIdentityRect(_:)](vision/vnnormalizedrectisidentityrect(_:).md)
- [VNImagePointForFaceLandmarkPoint(_:_:_:_:)](vision/vnimagepointforfacelandmarkpoint(_:_:_:_:).md)