# Functions that convert from RGB to YCbCr Convert image data represented by red, green, and blue channels to luma, blue-difference, and red-difference channels. ## Topics ### Converting to 4:2:0 [`func vImageConvert_ARGB8888To420Yp8_CbCr8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To420Yp8_CbCr8(_:_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to a planar Yp buffer and a 2-channel CbCr buffer. [`func vImageConvert_ARGB8888To420Yp8_Cb8_Cr8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To420Yp8_Cb8_Cr8(_:_:_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to planar Yp, Cb, and Cr buffers. ### Converting to 4:2:2 [`func vImageConvert_ARGB8888To422CbYpCrYp8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To422CbYpCrYp8(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 8-bit-per-channel 4:2:2 CbCrYp buffer. [`func vImageConvert_ARGB8888To422YpCbYpCr8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To422YpCbYpCr8(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 8-bit-per-channel 4:2:2 YpCbYpCr buffer. [`func vImageConvert_ARGB8888To422CbYpCrYp8_AA8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To422CbYpCrYp8_AA8(_:_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 8-bit-per-channel 4:2:2 CbYpCrYp buffer and an 8-bit alpha buffer. [`func vImageConvert_ARGB8888To422CbYpCrYp16(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To422CbYpCrYp16(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to a 16-bit-per-channel 4:2:2 CbYpCrYp buffer. [`func vImageConvert_ARGB8888To422CrYpCbYpCbYpCbYpCrYpCrYp10(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To422CrYpCbYpCbYpCbYpCrYpCrYp10(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to a 10-bit-per-channel 4:2:2 CrYpCbYpCbYpCbYpCrYpCrYp buffer. [`func vImageConvert_ARGB16UTo422CbYpCrYp16(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB16UTo422CbYpCrYp16(_:_:_:_:_:)) Converts an unsigned 16-bit-per-channel, 4-channel ARGB buffer to a 16-bit-per-channel 4:2:2 CbYpCrYp buffer. [`func vImageConvert_ARGB16Q12To422CrYpCbYpCbYpCbYpCrYpCrYp10(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB16Q12To422CrYpCbYpCbYpCbYpCrYpCrYp10(_:_:_:_:_:)) Converts a fixed-point 16-bit-per-channel, 4-channel ARGB buffer to a 10-bit-per-channel 4:2:2 CrYpCbYpCbYpCbYpCrYpCrYp buffer. ### Converting to 4:4:4 [`func vImageConvert_ARGB8888To444CrYpCb8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To444CrYpCb8(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 8-bit-per-channel 4:4:4 CrYpCb buffer. [`func vImageConvert_ARGB8888To444AYpCbCr8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To444AYpCbCr8(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 8-bit-per-channel 4:4:4 YpCbCr buffer. [`func vImageConvert_ARGB8888To444CbYpCrA8(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To444CbYpCrA8(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 8-bit-per-channel 4:4:4 CrYpCbA buffer. [`func vImageConvert_ARGB8888To444CrYpCb10(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To444CrYpCb10(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 10-bit-per-channel 4:4:4 CrYpCb buffer. [`func vImageConvert_ARGB8888To444AYpCbCr16(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888To444AYpCbCr16(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel ARGB buffer to an 16-bit-per-channel 4:4:4 YpCbCr buffer. [`func vImageConvert_ARGB16UTo444AYpCbCr16(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB16UTo444AYpCbCr16(_:_:_:_:_:)) Converts an unsigned 16-bit-per-channel, 4-channel ARGB buffer to an 16-bit-per-channel 4:4:4 AYpCbCr buffer. [`func vImageConvert_ARGB16Q12To444CrYpCb10(UnsafePointer, UnsafePointer, UnsafePointer, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB16Q12To444CrYpCb10(_:_:_:_:_:)) Converts a fixed-point 16-bit-per-channel, 4-channel ARGB buffer to an 10-bit-per-channel 4:4:4 CrYpCb buffer. ### Generating conversion information [`func vImageConvert_ARGBToYpCbCr_GenerateConversion(UnsafePointer, UnsafePointer, UnsafeMutablePointer, vImageARGBType, vImageYpCbCrType, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGBToYpCbCr_GenerateConversion(_:_:_:_:_:_:)) Generates the information that describes the conversion from ARGB to YpCbCr. [`struct vImageYpCbCrType`](/documentation/Accelerate/vImageYpCbCrType) Constants that describe the encoding of a YpCbCr image for conversions between RGB and YpCbCr. [`struct vImageARGBType`](/documentation/Accelerate/vImageARGBType) Constants that describe the encoding of an ARGB image for conversions between RGB and YpCbCr. [`struct vImage_ARGBToYpCbCrMatrix`](/documentation/Accelerate/vImage_ARGBToYpCbCrMatrix) The 3 x 3 matrix that the vImage library uses to convert from RGB to YpCbCr. [`struct vImage_ARGBToYpCbCr`](/documentation/Accelerate/vImage_ARGBToYpCbCr) The information that describes the conversion from ARGB to YpCbCr. [`struct vImage_YpCbCrPixelRange`](/documentation/Accelerate/vImage_YpCbCrPixelRange) The description of range and clamping information for YpCbCr pixel formats. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)