Despite the proven advantages of 3D technology for inline quality inspection applications, many organizations still rely solely on 2D machine vision for their quality control processes.
While useful in a select number of scenarios, 2D vision is limited in its ability to achieve 100% quality control—which is why it is so important for organizations to invest in a smart 3D solution. To illustrate this point let’s compare the basic capabilities of a 3D laser profiler to a 2D vision sensor.
- 3D Shape Measurement – A commonly overlooked problem is that 2D sensors do not support measurement related to 3D shape.
- Apparent Size – Because 2D sensors cannot detect depth, they are highly dependent on the distance from the camera to the target.
- Contrast-Based Measurements – 2D sensors measure an object’s contrast (edge data), which means 2D relies on lighting and color/greyscale variation to detect features.
- Robotic Inspection Applications – Industrial robots work in a three-dimensional world. Unfortunately, 2D technology is unable to provide the necessary depth and spatial information (in 6 degrees of freedom) for the growing number of vision-guided robotics (VGR) systems used for automated quality control.
Laser profilers combine 3D and 2D capability for total quality inspection.
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