Marker for a navigation system and method for detecting a marker
AssigneeBrainlab AG
InventorsAndreas BLUMHOFER, Johannes MANUS
Life of this patent
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Abstract
A marker for a navigation system includes a reflective surface, and a light-absorbing, non-reflective or low-reflective object arranged at a defined distance from the reflective surface.
Claims14
A marker for a navigation system, comprising:
- a reflective surface;
- and
- a light-absorbing, non-reflective or low-reflective object arranged at a distance from the reflective surface.
A method for detecting a position of a marker or marker array that includes a reflective surface and a light-absorbing, non-reflective or low-reflective object arranged at a distance from the reflective surface, comprising:
- ascertaining whether an area of the marker which does not reflect light is completely surrounded by a light-reflective area in the reflection image;
- and
- concluding data obtained from the marker is defective if the area of the marker that does not reflect light is not completely surrounded by the light-reflective area.
A program embodied on a computer readable medium for detecting a position of a marker or marker array that includes a reflective surface and a light-absorbing, non-reflective or low-reflective object arranged at a distance from the reflective surface, comprising:
- code that ascertains whether an area of the marker which does not reflect light is completely surrounded by a light-reflective area in the reflection image;
- and
- code that concludes data obtained from the marker is defective if the area of the marker that does not reflect light is not completely surrounded by the light-reflective area.
Dependencies are inferred from the claim text.