As shown in the picture, i want to know if it is possible to:
1) recognize the feature edge like face,nose,eyes,mouse,etc.
2) highlight the feature edge with draggable select lasso,
3) return the coordinates of each pixel lies on the lasso after the user finish dragging some of the lasso points.
Put the first part aside, Suppose i've got the points along the feature edge, how can I get a lasso selection connecting all the points together? And if I drag some of the points,leaving others fixed, how can I get all the new coordinates?
Any help would be greatly appreciated.