topic RealSense D400 - Strobing IR Projection in Items with no label

RealSense D400 - Strobing IR Projection

CWest4 — Tue, 23 Jan 2018 20:00:28 GMT

Is it possible to strobe the IR projection synchronously with the IR camera capture?

The purpose of this is a scenario where there is a secondary sensor that measures in the IR spectrum. The IR projection from the RealSense would interfere with this sensor. If the projection could be strobed, then the secondary sensor could be triggered out of phase with the depth measurements and IR projection.

Re: RealSense D400 - Strobing IR Projection

MartyG — Tue, 23 Jan 2018 23:51:47 GMT

Rather than strobing the projector (if it is even possible), it may be better to use the D435 camera model's ability to sync its stream with external sensors using the four GPIO pins it has on it.

https://github.com/IntelRealSense/librealsense/blob/development/doc/rs400/external_devices.md librealsense/external_devices.md at development · IntelRealSense/librealsense · GitHub

Re: RealSense D400 - Strobing IR Projection

idata — Wed, 24 Jan 2018 00:10:35 GMT

Hello ChristianW,

Strobing is not possible on RealSense cameras but it is possible to turn off the IR projector. Marty is right, you may be able to accomplish the same thing using the external hw triggers. More information on this capability is forthcoming.

Regards,

Jesus G.

Intel Customer Support

Re: RealSense D400 - Strobing IR Projection

ÉLége — Fri, 02 Feb 2018 21:25:31 GMT

Thank you for the answer. I have a complementary question though. If we turn off the IR projection, how much of an accuracy loss can we expect?

Re: RealSense D400 - Strobing IR Projection

idata — Fri, 02 Feb 2018 22:45:39 GMT

Hello,

We don't have specific measurements for accuracy loss. It all depends on the lighting of the environment, distance, etc. The more light there is, the less you need the projector. You must test in your own target environments.

Regards,

Jesus

Intel Customer Support