The SP1 stereo vision system is described as a novel sensor solution for 3D depth perception that makes use of passive stereo vision. Basically, depth is estimated solely by comparing images recorded by two cameras at different viewing positions. This approach is said to be less affected by lighting conditions and is able to provide dense 3D sensory information. Because only a single exposure is required for stereo vision, it is also suitable for observing moving objects.
The SP1 connects to two industrial cameras, whose placement and optics are controlled by the user. This allows the system to be configured for covering very different measurement volumes. Should the requirements change, it is sufficient to just reposition the cameras or change the lenses. After a short re-calibration, the system is able to provide accurate depth measurements again. Specifications include
- Power consumption: less than 4W
- Power supply: 5 Vdc
- Dimensions: 105 mm x 76 mm x 36 mm
- Weight: 0.25 kg
- I/O: USB 2.0 Host, Gigabit Ethernet, and 2x Trigger out
- Stereo algorithm: Semi-Global Matching (SGM)
- Disparity range: 112 pixels
- Supported frame rates: 30 fps for resolution 640 x 480 pixels, 20 fps for resolution 800 x 592 pixels
- Supported image size: Configurable from 320 x 240 pixels up to 800 x 800 pixels
- Sub-pixel resolution: 4 bits (1/16 pixel)
- Post-processing: Erroneous disparity removal, noise removal, speckle filtering
- Horizontal displacement: -39 to +39 pixels
- Vertical displacement: -39 to +39 pixels
- Interpolation: Bilinear
To see a viseo of the system in action, go to https://www.youtube.com/watch?v=vVVjFqUkG4E
More information is available at http://nerian.com/products/sp1-stereo-vision
Nerian Vision Technologies
Leinfelden-Echterdingen, Germany