isnan             138 modules/photo/src/fast_nlmeans_denoising_invoker_commons.hpp             if (std::isnan(w)) w = 1.0; // Handle h = 0.0
isnan             260 modules/photo/src/fast_nlmeans_denoising_invoker_commons.hpp             if (std::isnan(w)) w = 1.0; // Handle h = 0.0