Camera finds overhead lights not green light

[theycallhimtom]

So I got it to track but in a roundabout way. The old java program that ifirobotics gave out last year that allowed us to download a frame and see the picture. The problem with that program is that it does not use the settings from Kevin's code. So I edited the source so it would use the settings from Kevin's code and downloaded a picture. The default settings for the light in Kevin's code also detected part of our overhead lights. I found a much smaller range for colors that works very well for our conditions.

By the way the camera using Kevin's default settings sees everything but the light as purple and the light as a blue. The fluorescent lights showed up as yellow/blue.

[Alan Anderson]

Originally Posted by theycallhimtom

...the camera using Kevin's default settings sees everything but the light as purple and the light as a blue. The fluorescent lights showed up as yellow/blue.

That's because the camera is being told to look at the image using the YCrCb color space, but the program is presenting it as if it were RGB. The actual hue of the green light is very consistent even as the intensity varies with distance, so it's a lot easier to find a good range of values that will let you track it.