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Image - Model GEOCAL -Measurement Device
GEOCAL is a geometric camera calibration device that uses a beam expanded laser in combination with a diffractive optical element (DOE). This device introduces a new dimension in geometric camera calibration. Geometric camera calibration is essential for systems from certain industries, particularly those relying on the detection of objects in a moving scene (e.g., automotive, ADAS, security). After geometric calibration, the camera system will be able to more concretely measure distances and detect objects in a scene. A calibrated system will also be better equipped to compensate for high distortion levels (especially for wide field-of-view cameras) and to accurately align stereo camera pairs.
- Ability to generate a regular grid of light spots originating from infinity
- Measure geometric distortion, focal length, and principal point
- The camera position is translation invariant (to a certain extent)
- Easily manage the angle of camera rotation
- No relay lens required
- A very compact design
- Calibrate large field-of-view cameras
- Stereo camera alignments and adjustments
- Remove lens distortion using GEOCAL and OpenCV
The methods currently utilized for geometric camera calibration rely on test charts with regular patterns, but these patterns need to be scaled depending on the field of view and the intended object distance. Another problem facing the modern methods is the dependence on a relay lens when using a compact device or wanting to calibrate from infinity. GEOCAL avoids the use of test charts and a relay lens while, at the same time, improving the overall accuracy of the calibration. Finally, GEOCAL is suitable for measuring geometric distortion without the use of a test chart.