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It seems to create aliasing artefacts at edges. I wonder if this can be suppressed by scaling up the image and the filter radius and then scaling back down?
by jmpeax 7y ago
It seems to create aliasing artefacts at edges. I wonder if this can be suppressed by scaling up the image and the filter radius and then scaling back down?
- BubRoss 7y agoLook up bilateral filters and the various papers related to minimizing sharp segmentation.
- AstralStorm 7y agoIndeed, 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.)
- BubRoss 7y agoCan you link some papers that take about this? Segmenting on statistics isn't typical in the many papers I've read.