Snake is an active contour model for representing image contours. In this paper, we propose an e$cient active contour model which can represent highly irregular boundaries. The algorithm includes an adaptive force along the contour, and adjusts the number of points for the snake according to the desired boundary. A better stopping criterion based on the area of a closed contour is devised. Furt...

In the present study, we investigated the detection of contours defined by constant curvature and the statistics of curved contours in natural scenes. In Experiment 1, we examined the degree to which human sensitivity to contours is affected by changing the curvature angle and disrupting contour curvature continuity by varying the orientation of end elements. We find that (1) changing the angle...

Pixel level snakes (PLS) are a cellular active contour technique inspired on the energy-based deformable models. They are based on a pixel-level discretization of the contours and a massively parallel computation on every contour cell which lead to a high speed processing without penalizing the efficiency of the contour location. PLS can be fully implemented in current focal plane processor arr...