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Training Loop with Edge Impulse

Create a loop with the Edge Impulse training platform and the AI Manager.

General Preparation

This tutorial assumes you have the following things already set up:

  • Nx Cloud account.

  • Nx Meta system installed.

    • System connected to Nx Cloud account.

    • Client installed.

    • Device added to configuration.

    • AI plugin installed.

  • Install the sclbl-integration-sdk repository.

    • git clone https://github.com/scailable/sclbl-integration-sdk.git

    • Followed the ‘Get started’ instructions.

Edge Impulse Preparation

When building a loop with Edge Impulse, you need a project with a trained model, plus its API key and project ID. See Step 2: Coupling Your Edge Impulse Model With Nx for where to find both.

The project ID is also shown in a box on the project info page:

Edge Impulse project info page showing the project ID

Steps

This loop consists of 7 steps.

  1. Add model to the AI Manager Cloud

  2. Update postprocessor

  3. Configure model and postprocessor

  4. Run the model

  5. Check the data

  6. Update the model in the cloud

  7. Update model in the system

Step 1: Add Model to AI Manager Cloud

Add the model of the training platform to the AI Manager Cloud.

For Edge Impulse

Train the model and link it to the AI Manager Cloud. See Step 1: Model Training Using the Edge Impulse Platform and Step 2: Coupling Your Edge Impulse Model With Nx for the full walkthrough with screenshots.

Step 2: Update Postprocessor

This step takes an example postprocessor from the sclbl-integration-sdk and modifies it with a specific condition to filter only certain images for sending.

For Edge Impulse

  1. Open the sclbl-integration-sdk into your favourite editor.

  2. Open the following Python script: postprocessor-python-edgeimpulse-example/postprocessor-python-edgeimpulse-example.py

  3. Find the location where the API is set and replace it with the API-key from your project. Look for the line: edgeimpulse.API_KEY

  4. Find the line upload_sample = False and modify the code below that to suit your condition.

  5. Compile and install the postprocessor using the instructions in the README.md of the project.

Step 3: Configure Model and Postprocessor

Select the model and postprocessor.

  1. In the desktop client go to the device, right click and select ‘Camera settings’.

  2. Go to the tab ‘Plugins’ and select the ‘AI Manager’.

  3. Click Manage Server, then click the icon with left-right arrows called Switch, or Assign a New Model if no model is assigned yet.

  4. Choose the model from step 1 and click ‘Ok’.

  5. Under the heading ‘Assigned Models’, select ‘Post Processor’ and select your post processor from step 2. If you didn’t rename it from the README it is called ‘Example-Postprocessor’.

  6. Under the heading ‘Runtime Status’, click ‘Start’ and wait for the status to be ‘Runtime is running’.

  7. Click ‘Ok’ at the bottom.

Step 4: Run the Model

To run the model the device must be visible in the layout.

  1. Double click your device to make it visible.

  2. On the top right click the left icon ‘Object search’ if the model contains bounding boxes to see them.

Step 5: Check the Data

This step checks the incoming data, labels it, and retrains the model.

Edge Impulse

See also the section on importing models from Edge Impulse.

  1. Go to the project page.

  2. Select ‘Data acquisition’.

  3. Training and Test should contain data coming from the server.

  4. Label the data.

  5. Select ‘Retrain model’ and then ‘Train model’.

Step 6: Update the Model in the Cloud

This step updates the model in the AI Manager Cloud.

  1. Two ways to update the model

    1. Go back to the ‘Manage server’ in the desktop client / AI plugin and click the name of the model.

    2. Log into the AI Manager Cloud and go to the model.

  2. Click the button ‘Update from <TrainingPlatform>’

Step 7: Update Model in the System (Work in Progress)

This step updates the models in the system.

  1. (option not available yet) In the desktop client / AI plugin click the button ‘Update models’.

  2. Manually delete the model cache. Follow these instructions:

On the commandline:

In the desktop client / AI plugin stop and start the plugin

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