Bart_van_der_Wolf Posted April 18, 2017 Share Posted April 18, 2017 Hi, In addition to the current options for Lanczos 3 (separable/non-separable) which usually are fine for downsampling there are two possible improvements for upsampling or transformation/rotation/distortion possible. To avoid the risk of the gibbs phenomenon (edge ripple or ringing artifacts) a Lanczos 2 filter option should not be too hard to add, it's just a parameter for the already available Lanczos code. It would most likely preserve detail better than Bicubic, and have less risk of generating artifacts than Lanczos 3. Very useful for distortion and rotation or noisy/structured surfaces as well. Another very decent generic up- and downsampling filter would be a Mitchell Netravali filtered resampling, for which the GPU optimized code is readily available (e.g. in Nvidia's CUDA Parallel Computing Platform). Cheers, Bart TEcHNOpls 1 Quote Link to comment Share on other sites More sharing options...
TEcHNOpls Posted April 18, 2017 Share Posted April 18, 2017 This topic in general should have a better explanation in help with appropriate examples. Quote "I'm a lumberjack and I'm OK, I sleep all night, and I work all day..." Link to comment Share on other sites More sharing options...
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