1. If the snake is initialized “too far” from the object boundary, it is possible that the
contour may not be able to converge onto object boundary.
2. An increase in the amount of smoothing (σ value) increases the range from which
a snake can converge onto an object smoothing. This can be seen as that blurring
of edges increases there “encatchment” area.
3. If the energy scaling factor is “too big” for a given image than though active
contour can converge onto image boundary but keeps on wiggling along the
object boundary. In most cases it ends up loosing track on object boundary.
4. W (Eedge) value must be carefully chosen in case of binary images which has very
high gradient values.
5. The Eterm defines the contribution of curvatures to the overall energy term. When
weight associated with this component in dominant in the overall energy, the
snakes seems to be attracted to corners first before converging onto the object
boundary. In cases where its weight is not dominant, edges are traced before the
corners by the snake.