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# make(format:matrix:chromaSiting:colorSpace:alphaIsOpaqueHint:)

Creates the description of image encoding in a Core Video pixel buffer from the specified properties.

```
static func make(format: vImageCVImageFormat.Format, matrix: vImage_ARGBToYpCbCrMatrix, chromaSiting: vImageCVImageFormat.ChromaSiting, colorSpace: CGColorSpace, alphaIsOpaqueHint: Bool) -> vImageCVImageFormat?
```

## Parameters

`format`

The format type of the image.

`matrix`

A [`vImage_ARGBToYpCbCrMatrix`](/documentation/Accelerate/vImage_ARGBToYpCbCrMatrix) that describes the conversion from RGB to the YpCbCr format.

`chromaSiting`

The chrominance location.

`colorSpace`

The color space of RGB and monochrome images. For YpCbCr images, this is the color space of the RGB image before conversion to YpCbCr using the ARGB-to-YpCbCr conversion matrix. The YpCbCr format RGB primaries and transfer function define the color space.

`alphaIsOpaqueHint`

A hint that indicates that the function interprets an image with an alpha channel as opaque.

## Return Value

A [`vImageCVImageFormat`](/documentation/Accelerate/vImageCVImageFormat) instance encoded with the function’s parameters.

## Discussion

This function derives values that parameters from the image format type don’t specify, such as the number of channels, channel names, and channel descriptions.

## See Also

[`func vImageCVImageFormat_Create(UInt32, UnsafePointer<vImage_ARGBToYpCbCrMatrix>!, CFString!, CGColorSpace!, Int32) -> Unmanaged<vImageCVImageFormat>!`](/documentation/Accelerate/vImageCVImageFormat_Create(_:_:_:_:_:))

Creates the description of image encoding in a Core Video pixel buffer from the specified properties.


---

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