VL.MLNet

Allows to run pre-trained ML.NET models as nodes in vvvv gamma.

Get it

Go to VL's command line and type

nuget install VL.MLNet -pre

For more information on how to install nugets in vvvv, please refere to this section of the Gray Book.

Supported scenarios

Regression
Text classification
Image classification

Usage

This plugin allows to run pre-trained ML.NET models as nodes. For each model, consisting of a zip file, you get a node with the correct input and output pins.

The first thing you should do is rename the column that will serve as a label in your dataset to Label. For instance, if you have a CSV that lists house prices depending on their size and number of floors, the column that actually contains the house price should be renamed Label
Then, train your model using Visual Studio's Model Builder plugin (please note that only regression, text and image classification are supported for now)
Once the training is complete, retrieve the zip file that's been created (you can look for its path in the code that has been automagically generated)
Rename that file to a friendly name : this will be your node's name
Append either one of those to the filename, depending on the scenario you picked :
- _Regression for a regression model
- _TextClassification for a text classification model
- _ImageClassification for an image classification model
Put this zip file in a folder named ml-models next to your VL document
Start vvvv, you should see an ML.MLNet category in the node browser containing one node per zip file

Pre-trained models

If you want to test the plugin right away without training your own models, you can try one of those I've trained and used during the development of the plugin :

Model name	Type	Description	Download link
CatDogOtter	Image Classification	Trained to recognize either cats, dogs or otters	Here
FakeNews	Text Classification	Trained over the fake and real news dataset. Will tell if an article, based on its title and content, appears to be fake news	Here
OffensiveOrNot	Text Classification	Trained over a subset of the WikiDetoxAnnotated dataset. Will tell if a comment is offensive or not	Here
RedWineQuality	Regression	Trained over the Red wine quality dataset. Will predict the quality of a red wine based on various inputs such as acidity, alcohol, etc	Here

Please note that when running the text classification models, you will get extra prediction labels that appear to be random excerpts of the input dataset. I'm not sure why this happens but I'm pretty confident it's because I made some mistakes when cleaning/merging CSV files before training.

Known issues

For some reason, the factory does not retrigger when a new model is added to the ml-models subdir. For now, you have to kill and restart vvvv for new models to be taken into account.

Credits

Massive thanks to azeno for his help on refactoring/optimizing the code
Michael Hompus for his voodoo code snippet that allows to retrieve score labels for classification models
Jonathan Crozier for his DynamicTypeFactory that gracefully spawns new classes at runtime