| 12.3. Coordinate Systems | ||
|---|---|---|
 | Chapter 12. Excursion: Image Processing in ML |  |
| 12.3. Coordinate Systems | ||
|---|---|---|
| | Chapter 12. Excursion: Image Processing in ML | |
In MeVisLab, three coordinate systems exist next to each other:
World coordinates
Voxel coordinates
Device coordinates
The blue rectangle shows the same region in the three coordinate systems.
World coordinates are:
Global: Combine several objects in a view
Absolute: Measure distances and angles
Isotropic: All directions are equivalent
Orthogonal: Coordinate axes are orthogonal to each other
Voxel coordinates are:
Relative to an image
Dependent on voxel spacing
Continuous from [0..x,0..y,0..z], voxel center at 0.5
Often non-isotropic, sometimes non-orthogonal
Direct relation to voxel location in memory
Device coordinates are:
2D coordinates in OpenGL viewport
Measured in pixel
Have their origin (0,0) in the top left corner of the device (with x-coordinates increasing to the right and y-coordinates increasing downwards)
© 2024 MeVis Medical Solutions AG
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| 12.2. Structure of MeVisLab |  | 12.4. Affine Transformations |
