Quote:
Originally Posted by mikegrundvig
This worked incredibly well for our vision system. We'd get pitch black images with the retroreflective tape glowing bright white. Basically ideal conditions for computer vision. If even worked with sunlight streaming in the windows at the camera and it produced no visible light to distract drivers.
-Mike
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This is a very interesting idea and I'm glad it worked well. That being said, we had absolutely no issues tracking a target last year in all lighting conditions (inside fluorescent, tungsten, outside cloudy, sunny, etc.). The trick was stated in the vision white paper last year. It requires overexposing the camera with a bright light source and then setting the camera to hold BOTH the white balance and exposure settings. Then set up a threshold based on Hue, Saturation and Luminance and tweak it. I took sample images at all events and ran them through the NI Vision Assistant as well and never had to change the threshold values.
- Bryce