Halide experiment in implementing the "Features from accelerated segment test (FAST)" algorithm for corner-y image features. Part of the exercise is seeing whether the initial rejection test can be omitted (trade extra compute for better memory locality), and whether some tile-level reduction could do a simple and cheap form of non-maximal suppression.
Run make, after extracting the output of Halide's make distrib target into project root.
Feel free to use for any purpose -- free as in couch.