Hang on, doesn’t numpy use C (row major) array ordering by default? checks docs Seems like it does. However, numpy array indexing also follows the maths convent

Hang on, doesn’t numpy use C (row major) array ordering by default? checks docs Seems like it does. However, numpy array indexing also follows the maths convention where 2D arrays are indexed by row, column (as does C, by the way), so to access pixel x, y you need to say im[y, x]. And the image libraries where I have toyed with with numpy integration (only Pillow, to be honest) seem to work just fine like this — a row of pixels is stored contiguously in memory. So I don’t quite see why the author claims that numpy stores a column of pixels contiguously, but I have only glanced at the article, so quite probably I have missed something.