Bilateral Filter

References

https://docs.opencv.org/4.x/js_filtering_bilateralFilter.html

https://docs.opencv.org/4.x/d4/d86/group__imgproc__filter.html#ga9d7064d478c95d60003cf839430737ed

https://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/MANDUCHI1/Bilateral_Filtering.html