BlurHash is a compact representation of placeholders for images. A blur hash is encoded as a short string that can be rendered to a bitmap at runtime to display a “blurry” version of the source image. The way it works remind me of how spherical harmonics are used in 3D rendering engines to efficiently encode irradiance. I recently remembered that I had been meaning to look at the Kotlin implementation of BlurHash to see if there was a way to make it faster. I looked up the KMP port and af...
