rOpenSci Image Convolution in R using Magick

Release 1.4 of the magick package introduces a new feature called image convolution that was requested by Thomas L. Pedersen. In this post we explain what this is all about. The new image_convolve() function applies a kernel over the image. Kernel convolution means that each pixel value is recalculated using the weighted neighborhood sum defined in the kernel matrix. Many operations in magick such as blurring, sharpening, and edge detection are actually special cases of image convolution.