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Backlit Aruco Markers

Hi! I'm building a robot and I'm trying to have it follow an aruco marker. The problem is that it's often backlit so the camera can't see it at all.
C:\fakepath\Screen Shot 2018-05-03 at 12.25.07 AM.jpg
I had the idea of using a phone to display the marker so that it was lit better. But actually the paper marker works better. The camera seems to distort the corners and edges of the marker as seen below.
C:\fakepath\Screen Shot 2018-05-03 at 12.24.30 AM.jpg
I'm going to try a better camera, but does anyone have any ideas on how to fix this? I'm also trying to make my own 3D printed mask and white light, but am worried the same problem will occur. (Also I'll need to paint this black). C:\fakepath\IMG_2983.JPG
I'm also having problems with motion blur when the robot moves, if anyone has any suggestions.
Thanks, Jordan