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Report Issue| Table of Contents ▸ List of Commands ▸ Features Extraction ▸ edgels | ◀ distance | edges ▶ |
edgels
Arguments:
- x0,y0,_n0,_is_high_connectivity={ 0:No | 1:Yes }
Description:
Extract one or several lists of edgels (and their normals) that defines a 2D binary silhouette.When specified (i.e. !=-1), arguments x0,y0,n0 are the coordinates of the starting edgel, which must be located on an edge of the binary silhouette.
If x0,y0 and n0 are specified, only a single list of edgels is returned.
If only x0,y0 are specified (meaning n0=-1), up to 4 lists of edgels can be returned, all starting from the same point (x0,y0).
If no arguments are specified (meaning x0=y0=n0=-1), all possible lists of edgels are returned.
A list of edgels is returned as an image with 3 channels [x,y,n] where x and y are the 2D coordinates of the edgel pixel, and n is the orientation of its associated canonical normal (which can be { 0:[1,0] | 1:[0,1] | 2:[-1,0] | 3:[0,-1] }.Default values:
x0=y0=n0=-1 and is_high_connectivity=1.