OAK-D-PRO-FF very inaccurate depth measurement

AlessandroB · 2023-04-27T09:31:14+00:00

Hello, I'm performing a metrological assessment of a brand new OAK-D-PRO-FF device. This is done by moving a vertical target by means of a translating sled....

Robengaard

Have you calibrated the camera?

Calibration — DepthAI Hardware Documentation 1.0.0 documentation (luxonis.com)

Br Martin

AlessandroB

Hi Martin,

thank you for your feedback.

As I wrote in my request, recalibration is for sure something I was considering as the next step. Nevertheless, I was wondering whether I was making some mistakes or missing some important points, as the documentation states that the factory calibration is supposed to give good results, while my errors are big.

Do you think that recalibration is the right way to proceed?

May it happen that some devices leave the factory with such a bad calibration? This wouldn't be a problem, but I need to understand if this happens sometimes or if each camera must be recalibrated (we are considering to use this device for a new product).

Many thanks

Alessandro

Robengaard

Hi Alessandro,

I had the exactly same problems before recalibration, it did a much better result than I expected.

Yesterday I was told that temperature changes can require a new calibration, but I'm not sure how much of a temperature change is needed for require a new calibration.

Br Martin

erik

Hi AlessandroB / Robengaard , Thank you for the report, and we apologize for the inconvenience of inaccurate factory calibration - we are soon rolling out factory depth accuracy evaluations which should catch such "bad apples".
Kind regards, Erik

erik

AlessandroB Robengaard Could you also share the MxID of your devices? We want to check the flashed factory calibration.

import depthai as dai
with dai.Device() as device:
    print(device.getMxId())

Thanks, Erik

AlessandroB

Hi Martin,

thank you very much for sharing your experience with me.

I'm going to try. I'll let you know.

Alessandro

AlessandroB

Hi Martin,

I recalibrated the device and the results have dramatically improved.

Many thanks for your help!

Alessandro

AlessandroB

Hi erik ,

thanks for your reply.

This is a very good news, as final users hardly accept to recalibrate the devices.

Alessandro

AlessandroB

Hi erik

mine is MxId: 18443010E1A6AB0F00.

Alessandro

erik

Hi AlessandroB ,
Following up, it looks like we don't have logs for this device (we log since May 2022), so unfortunately, we can't check the calibration accuracy. We have since also updated out calibration process (with TVs rather than robot hand), which improved the calibration in general. I do hope such issues won't be encountered in the future anymore.
Thanks, Erik

AlessandroB

Hi erik ,

noted, thanks!