Back to FabImage Library website
You are here: Start » Function Reference » Region Features » RegionOrientation
RegionOrientation
| Header: | FIL.h |
|---|---|
| Namespace: | fil |
Computes the orientation of a region as an angle of value in range 0.0 - 180.0.
Syntax
C++
C#
void fil::RegionOrientation ( const fil::Region& inRegion, float& outOrientationAngle )
Parameters
| Name | Type | Default | Description | |
|---|---|---|---|---|
 |
inRegion | const Region& | Input region | |
 |
outOrientationAngle | float& |
Description
Region orientation can be thought of as the direction in which the region is oriented. Mathematically it is the angle between X-axis and the line passing through the region mass center, that rotation around this line produces the smallest torque.
Hints
- If the input region is not guaranteed to be non-empty, precede this filter with SkipEmptyRegion.
Examples
 |
 |
Orientation of the sample region equals to 53.496, which is visualized on the second image by drawing the line of this orientation passing through the region mass center.
See Also
- ShapeOrientation – Computes the shape orientation as angle with value in range 0.0 - 180.0.
