 Stereoscopic PIV
DynamicStudio Stereoscopic PIV is a method for extracting the third, out-of-plane, velocity component from two cameras and is based on the principle of parallax. In PIV, by placing two cameras so they observe the light-sheet plane from two different angles, the parallax effect means that you obtain slightly different two-velocity component vector maps from each camera.
The differences between them arise from the third, out-of-plane velocity component and the geometrical configuration of the two cameras.
After image calibration, this third velocity component can be evaluated. In addition, the two in-plane velocity components can be recalculated, correcting for parallax errors.
Solution components
• The PIV stereo-camera systems allow user-selection of the geometry of the camera set-up. The user has full control of the distance and angle between the cameras as well as fine control of the angle between the CCD array and camera lens in order to focus correctly. (The Scheimpflug condition can be satisfied).
• Multiple camera synchronisation support for image acquisition from two cameras.
• 3D PIV software including camera calibration routines that measure and account for perspective distortion arising from the skewed orientation of the cameras, routines to compute the third velocity component from the two camera data sets and presentation of 3-component velocity information.
• A calibration tool is included. Camera calibration requires calibration images to be recorded in the lightsheet as well as in front of and behind it. DynamicStudio 3D PIV allows automatic recording of these calibration images.
More information about 2D and 3D stereoscopic PIV
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