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|   | Edgel [Edge Detection] |  | 
#include <vigra/edgedetection.hxx>
| Public Attributes | |
| float | orientation | 
| float | strength | 
| float | x | 
| float | y | 
| float orientation | 
The edgel's orientation. This is the angle between the x-axis and the edge, so that the bright side of the edge is on the right. The angle is measured counter-clockwise in radians like this:
  edgel axis
      \  (bright side)
 (dark \
 side)  \ /__
         \\  \ orientation angle
          \  |
           +------------> x-axis
           |
           |
           |
           |
    y-axis V
So, for example a vertical edge with its dark side on the left has orientation PI/2, and a horizontal edge with dark side on top has orientation 0. Obviously, the edge's orientation changes by PI if the contrast is reversed.
| float strength | 
The edgel's strength (magnitude of the gradient vector).
| float x | 
The edgel's sub-pixel x coordinate.
| float y | 
The edgel's sub-pixel y coordinate.
| 
© Ullrich Köthe     (ullrich.koethe@iwr.uni-heidelberg.de)  | 
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