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#include <vigra/edgedetection.hxx>
Public Attributes | |
float | orientation |
float | strength |
float | x |
float | y |
Helper class that stores edgel attributes.
float x |
The edgel's sub-pixel x coordinate.
float y |
The edgel's sub-pixel y coordinate.
float strength |
The edgel's strength (magnitude of the gradient vector).
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.
© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) |
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