MomentsOfInertia3dMsr
Contains the features related to the covariance matrix of a three-dimensional image.
Object members
| Measurement name | Description | Element type | Indexing |
|---|---|---|---|
| momentXX | The XX moment of order 2 in voxel coordinates. It is the first diagonal element of the 3D covariance matrix. | Floating point | None |
| momentYY | The YY moment of order 2 in voxel coordinates. It is the second diagonal element of the 3D covariance matrix. | Floating point | None |
| momentZZ | The ZZ moment of order 2 in voxel coordinates. It is the third diagonal element of the 3D covariance matrix. | Floating point | None |
| momentXY | The XY moment of order 2 in voxel coordinates. It is the elements (1,2) and (2,1) of the 3D covariance matrix. | Floating point | None |
| momentXZ | The XZ moment of order 2 in voxel coordinates. It is the elements (1,3) and (3,1) of the 3D covariance matrix. | Floating point | None |
| momentYZ | The YZ moment of order 2 in voxel coordinates. It is the elements (2,3) and (3,2) of the 3D covariance matrix. | Floating point | None |
| orientation1Theta | The azimuthal angle, in degrees, of the main orientation of the image structures. It is given by the orientation of the eigenvector associated with the largest eigenvalue of the covariance matrix. | Floating point | None |
| orientation1Phi | The polar angle, in degrees, of the main orientation of the image structures. It is given by the orientation of the eigenvector associated with the largest eigenvalue of the covariance matrix. | Floating point | None |
| orientation2Theta | The azimuthal angle, in degrees, of the secondary orientation of the image structures. It is given by the orientation of the eigenvector associated with the smallest eigenvalue of the covariance matrix. | Floating point | None |
| orientation2Phi | The polar angle, in degrees, of the secondary orientation of the image structures. It is given by the orientation of the eigenvector associated with the smallest eigenvalue of the covariance matrix. | Floating point | None |