About saturation:

• a metric implemented in Delve for identifying the diversity of inputs to a layer.
• two options for calculating saturation (via principal components of neuron preactivation-states over training): "Simpson diversity index" and "Cumulative 99"
• layer saturation appears above the layer. High saturation (yellow or red) indicates increasing the layer size.

Read about it in "Spectral Analysis of Latent Representations" arXiv and please cite as:

@misc{shenk2019spectral,
    title={Spectral Analysis of Latent Representations},
    author={Justin Shenk and Mats L. Richter and Anders Arpteg and Mikael Huss},
    year={2019},
    eprint={1907.08589},
    archivePrefix={arXiv},
    primaryClass={cs.LG}
}

Instructions from the source repo:

To run the visualization locally, run:

• npm i to install dependencies
• npm run build to compile the app and place it in the dist/ directory
• npm run serve to serve from the dist/ directory and open a page on your browser.

For a fast edit-refresh cycle when developing run npm run serve-watch. This will start an http server and automatically re-compile the TypeScript, HTML and CSS files whenever they change.