Top-left: I-band SL2S J02140-0535 observation, also featuring a giant arc. Top-right: regular grid of disk-shaped areas providing the initial condition of the displacement iterations. Only every second row and column of areas are shown. Bottom-left: areas after three iterations, each moving them to their centre of brightness, and the path they traced. Bottom-right: local orientations for each area, determined using the second-brightness moments. Lines corresponding to coherent areas are highlighted. The red contours show the segmentation of the objects.