Intel Realsense D435 Interfearance
Hello,
My understanding is that two colinear realsense cameras will only improve the accuracy of the depth measurement and will not interfere with each other. My question is if the laser projectors on different robots could interfere with the sensors if pointed directly at each other, potentially causing software or hardware glitches? Thanks
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Hi Acookson Multiple RealSense 400 Series cameras do not interfere with each other, though they can interfere with non-RealSense infrared devices.
The RealSense D405 model has an IR Cut filter on its sensors that block near-infrared frequencies and so prevent the D405 from seeing the infrared range and being interfered with by them. It instead can only see the lower visible light frequencies. D405 is also not equipped with an infrared pattern projector. However, D405 has an ideal depth sensing range of 7 cm to 50 cm and so would not be a better choice than D435 if you require the camera to perform longer-range depth sensing.
RealSense 400 Series cameras are able to make use of ambient light in the scene to analyze surfaces for depth detail, so if you are concerned that the D435's infrared pattern projector could interfere with non-RealSense equipment then in a well illuminated location the projector could be turned off to remove the laser and the projected pattern.
If disabling the IR projection of the RealSense camera has a negative effect on the depth image (which it can if a scene's light illumination level is low) then you could consider adding a visible pattern projector to the robot that the camera is attached to in order to add texture to surfaces that the camera can analyze for depth information. Intel's white-paper guide about use of projectors with 400 Series cameras provides advice about visible projectors.
https://dev.intelrealsense.com/docs/projectors#6-the-consumer-front-projector
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