# Functions that convert between integer interleaved buffers Convert the bit depths of interleaved integer image data. ## Topics ### Converting from 8-bit buffers [`func vImageConvert_RGB888toRGB565_dithered(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, Int32, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_RGB888toRGB565_dithered(_:_:_:_:_:)) Converts an 8-bit-per-channel, 3-channel interleaved buffer to an RGB565 3-channel interleaved buffer using the specified dithering algorithm. [`func vImageConvert_ARGB8888toARGB1555(UnsafePointer, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888toARGB1555(_:_:_:)) Converts an 8-bit-per-channel, 4-channel interleaved buffer to an ARGB1555 4-channel interleaved buffer. [`func vImageConvert_ARGB8888toARGB1555_dithered(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, Int32, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888toARGB1555_dithered(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel interleaved buffer to an ARGB1555 4-channel interleaved buffer usng the specified dithering algorithm. [`func vImageConvert_RGBA8888toRGBA5551(UnsafePointer, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_RGBA8888toRGBA5551(_:_:_:)) Converts an 8-bit-per-channel, 4-channel interleaved buffer to an RGBA5551 4-channel interleaved buffer. [`func vImageConvert_RGBA8888toRGBA5551_dithered(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, Int32, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_RGBA8888toRGBA5551_dithered(_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel interleaved buffer to an RGBA5551 4-channel interleaved buffer usng the specified dithering algorithm. [`func vImageConvert_ARGB8888ToARGB16U(UnsafePointer, UnsafePointer, UnsafePointer, UInt8, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB8888ToARGB16U(_:_:_:_:_:_:)) Converts an 8-bit-per-channel, 4-channel interleaved buffer to an unsigned 16-bit-per-channel, 4-channel buffer with permutation. ### Converting from unsigned 16-bit-per-channel buffers [`func vImageConvert_RGB16UtoRGB888_dithered(UnsafePointer, UnsafePointer, Int32, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_RGB16UtoRGB888_dithered(_:_:_:_:)) Converts an unsigned 16-bit-per-channel, 3-channel interleaved buffer to an 8-bit-per-channel, 3-channel interleaved buffer using the specified dithering algorithm. [`func vImageConvert_ARGB16UToARGB8888(UnsafePointer, UnsafePointer, UnsafePointer, UInt8, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB16UToARGB8888(_:_:_:_:_:_:)) Converts an unsigned 16-bit-per-channel, 4-channel interleaved buffer to an 8-bit-per-channel, 4-channel interleaved buffer. [`func vImageConvert_ARGB16UtoARGB8888_dithered(UnsafePointer, UnsafePointer, Int32, UnsafePointer!, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB16UtoARGB8888_dithered(_:_:_:_:_:)) Converts an unsigned 16-bit-per-channel, 4-channel interleaved buffer to an 8-bit-per-channel, 4-channel interleaved buffer using the specified dithering algorithm. ### Converting from RGB565 16-bit-per-channel buffers [`func vImageConvert_RGB565toRGB888(UnsafePointer, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_RGB565toRGB888(_:_:_:)) Converts an RGB565 3-channel interleaved buffer to an 8-bit-per-channel, 3-channel interleaved buffer. ### Converting from ARGB1555 16-bit-per-channel buffers [`func vImageConvert_RGBA5551toRGBA8888(UnsafePointer, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_RGBA5551toRGBA8888(_:_:_:)) Converts an RGB5651 4-channel interleaved buffer to an 8-bit-per-channel, 4-channel interleaved buffer. [`func vImageConvert_ARGB1555toARGB8888(UnsafePointer, UnsafePointer, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageConvert_ARGB1555toARGB8888(_:_:_:)) Converts an ARGB1555 4-channel interleaved buffer to an 8-bit-per-channel, 4-channel interleaved 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)