PIL - image resize() from the basic code & idea

PIL: Python Image Library: https://github.com/python-pillow/

  Written by Fredrik Lundh(https://groups.google.com/g/dev-python/c/fbv5gWgaGpM?pli=1)

image resize algorithm

• https://en.wikipedia.org/wiki/Image_scaling
• https://en.wikipedia.org/wiki/Affine_transformation#Examples
• affine transformation scaling
• Please refer to "scale about image" image
• https://en.wikipedia.org/wiki/Bicubic_interpolation
• https://en.wikipedia.org/wiki/Bicubic_interpolation#/media/File:Comparison_of_1D_and_2D_interpolation.svg
• Pillow(PIL) Image resize NEAREST behavior differs depending on the version
• Resizing Images With Bicubic Interpolation

Image.resize(...)

 option: Image.NEAREST, Image.BICUBIC, Image.BILINER, ...

src/_imaging.c

 static PyObject * _resize(ImagingObject *self, PyObject *args)

src/libLmanging/Geometry.c

 ImagingTransform(...)