Indeed, a bilateral filter is this approach of selection but segmenting on signal statistics of the surrounding image rather than just value. (Usually variance

Indeed, a bilateral filter is this approach of selection but segmenting on signal statistics of the surrounding image rather than just value. (Usually variance for denoising, contrast for non-blocking sharpening, L2 metric like PSNR for deblocking, luminance for chroma artifact reduction after upscaling.)