SIFT, Matching and Stitching2026-11-11computer‑visionsiftkeypointsscale‑spacedifference‑of‑gaussiansfeature‑matchingratio‑testhomographyransacimage‑stitchingpanoramacomp9517agenticFinding the same points in two photographs and gluing the photographs together: scale-space extrema, the 128-dimensional SIFT descriptor, the ratio test, and a homography fitted by RANSAC.