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# vImageCVImageFormat_CopyConversionMatrix(_:_:_:)

Copies an RGB-to-YpCbCr conversion matrix to an image format’s internal matrix.

```
func vImageCVImageFormat_CopyConversionMatrix(_ format: vImageCVImageFormat, _ matrix: UnsafeRawPointer, _ inType: vImageMatrixType) -> vImage_Error
```

## Parameters

`format`

The destination [`vImageCVImageFormat`](/documentation/Accelerate/vImageCVImageFormat) instance.

`matrix`

The matrix that the function copies to the destination image format.

`inType`

The type of the matrix.

## Return Value

[`kvImageNoError`](/documentation/Accelerate/kvImageNoError); otherwise, one of the error codes in <doc://com.apple.documentation/documentation/Accelerate/data-types-and-constants>.

## Discussion

---

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