# vImageConvert_RGBA16UtoRGB16U(_:_:_:) Removes the alpha channel from an unsigned 16-bit-per-channel RGBA buffer to produce an unsigned 16-bit-per-channel RGB result. ``` func vImageConvert_RGBA16UtoRGB16U(_ rgbaSrc: UnsafePointer, _ rgbDest: UnsafePointer, _ flags: vImage_Flags) -> vImage_Error ``` ## Parameters `rgbaSrc` The source vImage buffer. `rgbDest` A pointer to the destination vImage buffer structure. You’re responsible for filling out the [`height`](/documentation/Accelerate/vImage_Buffer/height), [`width`](/documentation/Accelerate/vImage_Buffer/width), and [`rowBytes`](/documentation/Accelerate/vImage_Buffer/rowBytes) fields of this structure, and for allocating a data buffer of the appropriate size. On return, the data buffer this structure points to contains the destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks. `flags` The options to use when performing the operation. If your code implements its own tiling or its own multithreading, pass [`kvImageDoNotTile`](/documentation/Accelerate/kvImageDoNotTile); otherwise, pass [`kvImageNoFlags`](/documentation/Accelerate/kvImageNoFlags). ## Return Value [`kvImageNoError`](/documentation/Accelerate/kvImageNoError); otherwise, one of the error codes that describes. ## Discussion This function copies the red, green, and blue source channels to the destination buffer. --- 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)