# init(device:kernelWidth:kernelHeight:weights:) Initializes a convolution filter. ``` init(device: any MTLDevice, kernelWidth: Int, kernelHeight: Int, weights kernelWeights: UnsafePointer) ``` ## Parameters `device` The Metal device the filter will run on. `kernelWidth` The width of the kernel. Must be an odd number. `kernelHeight` The height of the kernel. Must be an odd number. `kernelWeights` A pointer to an array of `kernelWidth * kernelHeight` values to be used as the kernel. These values should be in row-major order. ## Return Value An initialized convolution filter object. --- 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)