I want to implement an image downscaling algorithm for iOS. After reading that Core Images's CILanczosScaleTransform was a great fit for it, I implemented it the following way: public func resizeI...

Is there any way or external library that can resize image using Lanczos (ideally) or at least bicubic alg. under Android? (faster is better of course, but quality is priority, a processing time is...

I'm trying to implement image downsampling with Lanczos2. However, the kernel seems to have zeros everywhere (since sin(pi*x)=0 if x is integer) except at the center pixel. Thus, if the downsampl...