How would I go about interfacing with OpenCV data types in cython? I've read the wiki on interfacing with external C code but didn't fully follow.
I'm currently using a ctypes wrapper for OpenCV from python and doing some manipulation there, but I would like to chain together a bunch of functions to run outside of the GIL on another core. >From ctypes, I can pass a function a pointer to my IPLimage (the opencv data). So I would imagine it would be something along the lines of: - write my functions in a pure C source file - declare extern functions in cython for the functions in the C source - compile the Cython file - compil the C source and compiled cython into the same pyd file The program flow would be like: - pass the pointer to the image to the cython function - forward that pointer to another function that executes with nogil which calls the functions from the C library - return the pointer to the modified image to calling function - return that same pointer back to python. Is that about right? Or am I way off? Chris
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