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Edgel Class Reference | ![]() |
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#include "vigra/edgedetection.hxx"
Public Attributes | |
| float | x |
| float | y |
| float | strength |
| float | orientation |
Detailed Description |
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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
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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. |
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The edgel's strength (magnitude of the gradient vector). |
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The edgel's sub-pixel x coordinate. |
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The edgel's sub-pixel y coordinate. |
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© Ullrich Köthe (koethe@informatik.uni-hamburg.de) |
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