Access PIL (or OpenCV) image buffer without depending on numpy?

[axxel]

nu-book/zxing-cpp uses pybind11::array_t to get access to the data() and shape() members when passed a numpy array, a PIL image or a cv2-matrix. Other than that, we don't use anything from the numpy package. Is it possible to achieve this without a dependency on the full numpy package?

See also zxing-cpp/zxing-cpp#283

[axxel]

To answer my own question: The solution for us was to use pybind11::buffer API to access the buffer protocol and additionally interpret any existing __array_interface__ attribute to also properly handle PIL images which do not adhere to the buffer protocol properly.

Details can be found here: https://github.com/zxing-cpp/zxing-cpp/pull/615/files