Install NEURAL and other depth processing without network connection

Software
1

Hi all,

I am using a ZED 2 with a Seeed Studios ReComputer J3010 (basically an NVIDIA Jetson). The Jetson runs Ubuntu 20.04.5. For security reasons I am not allowed to connect the Jetson to the internet at all. I installed the ZED SDK for Jetpack 5.1.1 via USB stick, and thereafter installed all the dependencies needed to launch the Zed apps like explorer and depth viewer the same way.

While depth viewer launches, I immediately get the error “Failed to download model. NEURAL mode won’t be available”. As I understand it, depth viewer is trying to grab the image processing model from the internet, and cannot because the Jetson isn’t connected to the network. I am wondering if there is a way to get NEURAL and the other image processing models for depth and tracking via flash drive, so I can use these functionalities. Thanks for the help!

2

Hi,

  1. It’s not very straightforward, but you can install the same ZED SDK Version on a PC connected to the internet (it doesn’t have to have a nvidia GPU), or download a Docker image. You can skip the installation of the optional elements; you will only need the ZED Diagnostic tool.

Then run the tool with “-aid” option to download all the AI models for this ZED SDK Version.

$ ZED_Diagnostic -aid

On Linux the model will be in /usr/local/zed/resources/ you can transfer them on the Jetson. (On Windows C:/ProgramData/Stereolabs/resources/)

  1. Alternatively, you can use this script; the model URLs are hardcoded and are specific for a given ZED SDK version, currently 4.1/4.2: Download ZED SDK **4.1** models · GitHub

A few things to note:

  • Models can change between ZED SDK version, make sure it matches
  • Some older targets may have a fallback model for compatibility reasons; the SDK may still complain it can’t download it if the PC doesn’t have the restriction (typically older Jetpack with old TensorRT).
1 Like
3

Hi Aymeric,

Thanks for the help. I got the SDK for windows on a connected machine, and now I’m trying to run the diagnostic tool with that ‘-aid’ flag. I can get it to run from powershell without the flag, but when I include -aid, it just doesn’t run. I tried with and without quote marks. Perhaps there’s a different flag for windows vs linux systems?

4

Can you try with CMD and not PowerShell?

5

I just tried it, unfortunately it does the same thing. I also tried using the ‘start’ command instead, that opens a window but it immediately closes and nothing further happens. Once again if I leave out the -aid tag, the diagnostic tool opens without issue.

6

I have no issue when I do it on my side

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Are you on Windows 10 or 11 ? I don’t think it matters but who knows?

1 Like
7

Fascinating… I’m on Windows 11 enterprise. Do you think it could be because I don’t have CUDA or a graphics card?

8

Yes I’m sorry about that, turns out in the current version you need CUDA even to download models, not directly in the tool but in the underlying libs.

Which version of the ZED SDK are you using ? I’ll update the script. We’ll also improve this part for future version

9

Gotcha, I kinda figured that might be an issue. I’m going to request my organization for approval to install CUDA, once I’ve got that I’ll try the process again.

10

So, I got the correct version of CUDA installed, but the same problem is happening. Nothing launches, just get a new line in the terminal. This is a weird problem…