Calibrating ZED X One on 2m Baseline

Hardware ZED X
1

Hi!

I am trying to calibrate a stereo pair of ZED X One on a 2m baseline and I am really struggling to get full coverage on in the calibration software.

I have tested using an A0 board with a 13x9 90mm grid. I struggle since when I get close, I can get coverage on one side but then I am out of frame on the other camera. If I increase the FOV, getting the top corners say of the frame becomes very difficult.

How were these cameras calibrated by stereolabs when testing a 2m baseline?

Any advice would be greatly appreciated.

2

Hey, can you share how you are calibrating it? I hope you aren’t trying to cover the entire FOV in one go. Link to calibration demo

Also when you say “increase the FOV” do you mean increase the distance between the calibration board and the camera pair?

3

Not trying to get the entire board in the FOV in one go and I am following the demo. To increase FOV, I mean taking it outside instead of being restrained to a room.

4

@ben-danial unfortunately, it’s hard to understand how you are trying to calibrate your rig.
Can you please record a video to show the behaviors of the calibration software?

5

Hi Ben,

I just finished calibrating the camera pair on a 1.5m baseline. I used a 1000mm x 800mm board with 16*12 boxes with a 50mm box width.

The furthest I had to be from the camera rig was 3.5-4m and I got pretty solid calibration with a very accurate baseline and complete coverage.

At times I had to come as close as 1.5 m to the camera rig to get complete coverage(green screen) during calibration . Not sure if this helps.

6

Hi auc7us,

This does help, is there a way we can get in touch to discuss further?

I would be interested to see how your results were using the depth viewer after calibrating.

7

Sent you a dm. We can continue the conversation there.

8

Hi @ben-danial and @auc7us I’m very interested in keeping up to date with your findings and collaborating on this.
I’ve also been battling with a ZED X One setup as you can see here:

Next week I’ll be trying some very narrow lenses (30deg fov) on my 4k X One pair, trying to test the limits of how much accuracy I can get at longer ranges.

9

Hi Blake,

Would love to talk!

I am also finding the long distance measurements to be poor.

I will send you a dm