<p>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.</p>

CC BY-SA 4.0
2018-06-13T13:04:22.803Z
2018-06-13T13:04:22.803Z
Michael Tiemann
<p>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.</p>

<camera><projector>
Camera-projector installation and reducing projector feedback
Safa
# Camera-projector installation and reducing projector feedback

(Asked by: username_0 on 2018-06-12)

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.

**Tags:** camera, projector


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## 1 answers

### Answer by username_1 on 2018-06-13. Score: 1

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.


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