---
title: "init(Yp:Cr_R:Cr_G:Cb_G:Cb_B:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/vimage_ypcbcrtoargbmatrix/init(yp:cr_r:cr_g:cb_g:cb_b:)"
---

# init(Yp:Cr_R:Cr_G:Cb_G:Cb_B:)

Creates a 3 x 3 matrix for converting Y’CbCr signals to RGB.

## Declaration

```swift
init(Yp: Float, Cr_R: Float, Cr_G: Float, Cb_G: Float, Cb_B: Float)
```

## Parameters

- `Yp`: The Yp in the conversion matrix.
- `Cr_R`: The Cr_R in the conversion matrix.
- `Cr_G`: The Cr_G in the conversion matrix.
- `Cb_G`: The Cb_G in the conversion matrix.
- `Cb_B`: The Cb_B in the conversion matrix.

## Return Value

Return Value A 3 x 3 matrix for converting Y’CbCr signals to RGB.

## Discussion

Discussion The vImage library uses this matrix to convert from YpCbCr to RGB using the following multiplication:                     | R |   | Yp    0     Cr_R |   | Y' |                     | G | = | Yp   Cb_G   Cr_G | * | Cb |                     | B |   | Yp   Cb_B     0  |   | Cr |

## See Also

### Creating a conversion matrix

- [init()](accelerate/vimage_ypcbcrtoargbmatrix/init().md)