# Morphology Dilate and erode images. ## Topics ### Dilating an object [`func vImageDilate_Planar8(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageDilate_Planar8(_:_:_:_:_:_:_:_:)) Dilates an 8-bit planar buffer. [`func vImageDilate_PlanarF(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageDilate_PlanarF(_:_:_:_:_:_:_:_:)) Dilates a 32-bit planar buffer. [`func vImageDilate_ARGB8888(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageDilate_ARGB8888(_:_:_:_:_:_:_:_:)) Dilates an 8-bit-per-channel, 4-channel interleaved buffer. [`func vImageDilate_ARGBFFFF(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageDilate_ARGBFFFF(_:_:_:_:_:_:_:_:)) Dilates a 32-bit-per-channel, 4-channel interleaved buffer. ### Eroding an object [`func vImageErode_Planar8(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageErode_Planar8(_:_:_:_:_:_:_:_:)) Erodes an 8-bit planar buffer. [`func vImageErode_PlanarF(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageErode_PlanarF(_:_:_:_:_:_:_:_:)) Erodes a 32-bit planar buffer. [`func vImageErode_ARGB8888(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageErode_ARGB8888(_:_:_:_:_:_:_:_:)) Erodes an 8-bit-per-channel, 4-channel interleaved buffer. [`func vImageErode_ARGBFFFF(UnsafePointer, UnsafePointer, vImagePixelCount, vImagePixelCount, UnsafePointer, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageErode_ARGBFFFF(_:_:_:_:_:_:_:_:)) Erodes a 32-bit-per-channel, 4-channel interleaved buffer. ### Maximizing an object [`func vImageMax_Planar8(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMax_Planar8(_:_:_:_:_:_:_:_:)) Maximizes an 8-bit planar buffer. [`func vImageMax_PlanarF(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMax_PlanarF(_:_:_:_:_:_:_:_:)) Maximizes a 32-bit planar buffer. [`func vImageMax_ARGB8888(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMax_ARGB8888(_:_:_:_:_:_:_:_:)) Maximizes an 8-bit-per-channel, 4-channel interleaved buffer. [`func vImageMax_ARGBFFFF(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMax_ARGBFFFF(_:_:_:_:_:_:_:_:)) Maximizes a 32-bit-per-channel, 4-channel interleaved buffer. ### Minimizing an object [`func vImageMin_Planar8(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMin_Planar8(_:_:_:_:_:_:_:_:)) Minimizes an 8-bit planar buffer. [`func vImageMin_PlanarF(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMin_PlanarF(_:_:_:_:_:_:_:_:)) Minimizes a 32-bit planar buffer. [`func vImageMin_ARGB8888(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMin_ARGB8888(_:_:_:_:_:_:_:_:)) Minimizes an 8-bit-per-channel, 4-channel interleaved buffer. [`func vImageMin_ARGBFFFF(UnsafePointer, UnsafePointer, UnsafeMutableRawPointer!, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImagePixelCount, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImageMin_ARGBFFFF(_:_:_:_:_:_:_:_:)) Minimizes an 8-bit-per-channel, 4-channel interleaved buffer. ### Getting the minimum buffer size Use the `kvImageGetTempBufferSize` flag with the appropriate morphological function --- 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)