Medical Imaging Interaction Toolkit  2023.04.99-980ed1b6 Medical Imaging Interaction Toolkit
mitk::StaticIGTHelperFunctions Namespace Reference

## Functions

MITKIGTBASE_EXPORT double GetAngleBetweenTwoQuaterions (mitk::Quaternion a, mitk::Quaternion b, itk::Vector< double, 3 > rotationVector)

MITKIGTBASE_EXPORT double GetAngleBetweenTwoQuaterions (mitk::Quaternion a, mitk::Quaternion b)

MITKIGTBASE_EXPORT itk::Matrix< double, 3, 3 > ConvertEulerAnglesToRotationMatrix (double alpha, double beta, double gamma)

MITKIGTBASE_EXPORT double ComputeFRE (mitk::PointSet::Pointer imageFiducials, mitk::PointSet::Pointer realWorldFiducials, vtkSmartPointer< vtkLandmarkTransform > transform=nullptr)
Computes the fiducial registration error out of two sets of fiducials. The two sets must have the same size and the points must correspond to each other. More...

## ◆ ComputeFRE()

 MITKIGTBASE_EXPORT double mitk::StaticIGTHelperFunctions::ComputeFRE ( mitk::PointSet::Pointer imageFiducials, mitk::PointSet::Pointer realWorldFiducials, vtkSmartPointer< vtkLandmarkTransform > transform = nullptr )

Computes the fiducial registration error out of two sets of fiducials. The two sets must have the same size and the points must correspond to each other.

Parameters
 imageFiducials realWorldFiducials transform This transform is applied to the image fiducials before the FRE calculation if it is given.
Returns
Returns the FRE. Returns -1 if there was an error.

## ◆ ConvertEulerAnglesToRotationMatrix()

 MITKIGTBASE_EXPORT itk::Matrix mitk::StaticIGTHelperFunctions::ConvertEulerAnglesToRotationMatrix ( double alpha, double beta, double gamma )

Converts euler angles (in degrees) to a rotation matrix.

## ◆ GetAngleBetweenTwoQuaterions() [1/2]

 MITKIGTBASE_EXPORT double mitk::StaticIGTHelperFunctions::GetAngleBetweenTwoQuaterions ( mitk::Quaternion a, mitk::Quaternion b )

Computes difference between two quaternions in degree, which is the minimum rotation angle between these two quaternions. The used formula is described here: https://fgiesen.wordpress.com/2013/01/07/small-note-on-quaternion-distance-metrics/

Returns
Returns the angle in degrees.

## ◆ GetAngleBetweenTwoQuaterions() [2/2]

 MITKIGTBASE_EXPORT double mitk::StaticIGTHelperFunctions::GetAngleBetweenTwoQuaterions ( mitk::Quaternion a, mitk::Quaternion b, itk::Vector< double, 3 > rotationVector )

Computes the angle in the plane perpendicular to the rotation axis of the two quaterions. Therefore, a vector is rotated with the difference of both rotations and the angle is computed. In some cases you might want to define this vector e.g., if working with 5D tools. For NDI Aurora 5D tools you need to defined this vector along the Z-axis.

Returns
Returns the angle in degrees.