# vImage.ConvolutionKernel2D A 2D matrix that represents a convolution kernel. ``` struct ConvolutionKernel2D ``` ## Topics ### Initializers [`init(values: [ComponentType], size: vImage.Size)`](/documentation/Accelerate/vImage/ConvolutionKernel2D/init(values:size:)) Returns a new convolution kernel structure with the size you specify. [`init(values: [ComponentType], width: Int, height: Int)`](/documentation/Accelerate/vImage/ConvolutionKernel2D/init(values:width:height:)) Returns a new convolution kernel structure with the width and height you specify. ### Instance Properties [`let width: vImagePixelCount`](/documentation/Accelerate/vImage/ConvolutionKernel2D/width) The width of the kernel that must be a positive, odd number. [`let height: vImagePixelCount`](/documentation/Accelerate/vImage/ConvolutionKernel2D/height) The height of the kernel that must be a positive, odd number. [`let values: [ComponentType]`](/documentation/Accelerate/vImage/ConvolutionKernel2D/values) The kernel weights or structuring element values that must contain `height * width` elements. --- 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)