FEATURE MACHINE VISION SYSTEMS Motion tracking in three dimensions
The latest 3D motion tracking technology is now finding its way into a range of applications which are helping to make both the manufacturing environment and the outside world a safer place
O
ne of the hot emerging technologies in the automotive industry is the
collision avoidance system which detects an imminent frontal crash using radar, optical sensors, or a combination thereof, and engages warning, braking and/or steering systems in response. Similarly, autonomous robot
manufacturers are using 3D object detection and tracking to guide the motions of robots or robotic vehicles. The security and surveillance industries also make use of this technology to detect and track motion in a video sequence.
SUB HEAD Halcon 12, MVTec’s imaging processing software now provides machine vision system developers with the ability to detect and track the 3D motion of objects
3D Scene Flow could be applied to determine the 3D motion of objects, for example vehicles, in a dynamic environment or the rotational axis and the angle of rotation of a rigid 3D object such as cylinder
information in the form of optical flow (the 2D shift of features between consecutive images), plus the change in disparity of features between two consecutive stereo image pairs. Calibrated 3D Scene Flow provides 3D
motion data by detecting and tracking the 3D position changes of surface points on a 3D object model found in consecutive point cloud scenes. In this case, the point clouds are reconstructed from the stereo image pairs. Halcon by MVTec is powerful image
Motorway monitoring
with Halcon’s new tool - 3D Scene Flow. Halcon’s 3D Scene Flow works using two consecutive stereo image pairs to determine uncalibrated (relative) and calibrated (real-world coordinate) 3D motion data. In the uncalibrated mode, 3D Scene Flow provides relative motion
processing software used worldwide within machine vision application. Multipix Imaging is the UK distributor with fully trained sales and support staff to assist its customers.
Multipix
www.multipix.com/products/Halcon12 T: 01730 233332
Enter 220
3D SENSORS TACKLE DIFFICULT INSPECTION TASKS N
owadays 3D machine vision systems can solve many applications, which were thought impossible to solve. Only a few years ago 3D-operations with height measurements or volumetric
measurements were not accurate enough, too expensive and too slow. But the latest technical developments have brought new sensors and evaluation hardware that provide 3D-inspection. Depending on the method it allows height measurements of component parts, IC-pins and the solder joints.
The EyeScan VR 3D sensor works with structured light. In this process the light is projected in stripes onto the object and due to the height structure of the object, creates a light pattern, which is then captured by a camera positioned in a certain angle. This method is said to be extremely fast and the EyeScan VR is therefore suitable for inspection tasks such as shape deviation, completeness, or BGAs and bent IC-pins. Stripe projection, image
recording and generation of the point cloud are performed in an integrated manner based on an intelligent camera and EyeVision software by EVT. The projector from Texas Instruments and the camera are synchronised with a frequency of 60Hz. This solution allows measurement times of below one second. And this with the evaluation of the light intensity in every single camera pixel. Additionally the 3D-cameras from the EyeScan series are supported by the
EyeVision image processing software. With the pre-programmed commands for 3D inspection and evaluation, the user can put together inspection programs via the drag-and-drop function of the software. And thanks to the intuitive self- explanatory user interface the user can create the programmess without programming skills.
EVT Eye Vision Technology
www.evt-web.com T: +49721 668 004 23(0) Enter 207
34 JUNE 2015 | AUTOMATION
/AUTOMATION
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