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# cameraIntrinsics

An option to specify the camera intrinstics.

```
static let cameraIntrinsics: VNImageOption
```

## Discussion

The camera intrinsics matrix is a <doc://com.apple.documentation/documentation/CoreFoundation/CFData> instance containing a <doc://com.apple.documentation/documentation/simd/matrix_float3x3>, which is a column-major matrix:

![The camera intrinsics matrix with focal length along the main diagonal](images/Vision/media-2954520.png)

`fx` and `fy` are the focal length in pixels. For square pixels, they have the same value.

`ox` and `oy` are the coordinates of the principal point.  The origin is the upper-left corner of the frame.

---

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