I'm working on a top-down projection game where i detect objects from the real world and project contours on them. My problem is with the output of the projector, I would like to know how to eliminate the feedback/not pick up the projector's output. Will using an infrared camera guarantee that or should i use other things? I tried placing a solar filter (from a floppy disk) in front of the camera which helped but i had to have a bigger light source in order to see the real objects. This is my first time working on such a project so i would appreciate your help.

closed as off-topic by Michael Liebman, Rob, Dr Mayhem Jun 18 '18 at 21:56

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions that are not production related (such as home theater) are off-topic. For more information, see the meta post on Non-Production Questions." – Michael Liebman, Rob, Dr Mayhem
If this question can be reworded to fit the rules in the help center, please edit the question.


If you place an IR-blocking filter in front of the projector and a IR-pass filter in front of an IR-sensitive camera and illuminate your objects with IR light, then the camera will see nothing from the projector, and you can color your contours with any visible light colors.

Not the answer you're looking for? Browse other questions tagged or ask your own question.