Edges and lines# Contour finding Contour finding Convex Hull Convex Hull Canny edge detector Canny edge detector Marching Cubes Marching Cubes Active Contour Model Active Contour Model Ridge operators Ridge operators Shapes Shapes Random Shapes Random Shapes Approximate and subdivide polygons Approximate and subdivide polygons Straight line Hough transform Straight line Hough transform Circular and Elliptical Hough Transforms Circular and Elliptical Hough Transforms Skeletonize Skeletonize Edge operators Edge operators