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RANSAC separates data into inliers and outliers by fitting models to random minimal samples and keeping the one with the largest consensus. Walked end to end on two vision problems: a walking-speed estimate that three false detections drag from 2.00 m/s to 0.78, and a basketball shot called from a 3-point parabola fit. Plus the one-line formula for how many samples you need, a hands-on lab, and real inlier ratios measured on the temple dataset.
