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# kCMFormatDescriptionCameraCalibration_IntrinsicMatrix

```
let kCMFormatDescriptionCameraCalibration_IntrinsicMatrix: CFString
```

## Discussion

\abstract Specifies the 3x3 camera intrinsic matrix for camera calibration.
\discussion Camera intrinsic matrix is a CFData containing a matrix_float3x3, which is column-major. Each element is in IEEE754 native-endian 32-bit floating point. It has the following contents:
fx	s	cx
0	fy	cy
0	0	1
fx and fy are the focal length in pixels. For square pixels, they will have the same value.
cx and cy are the coordinates of the principal point. The origin is the upper left of the frame.
s is an optional skew factor.

---

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