nx_featmatch.nx

nx_featmatch.nx -- THE FEATURE-MATCH WIRE: two images in, CORRESPONDENCES out, with nothing hand-supplied. This is the last classical link the cadtwin census lists as missing on P1. Every reconstruction rung built so far (essential matrix, pose refinement, dense sweep, fusion) has been fed correspondences that the GATE constructed from ground truth -- which quietly assumes away the hardest part of a real capture. Uses the EXISTING nx_features Harris + non-max-suppression rather than a second corner detector; the only new work is bridging the flat i64 intensity buffers this reconstruction chain uses into the *Image struct nx_features expects, plus the matcher itself. license_tier: ORIGINAL