Quick Training and Inference

Let’s see how quickly we can train models and start getting some predictions.

Start by labeling about 10 frames—this should be enough to at least get some initial results. Once you have the frames labeled, save your project.

Now you’re ready to train some models!


This tutorial assumes you have a GPU in your local machine and that TensorFlow is able to use your GPU. If you don’t have a GPU or you’re having trouble getting it to work, you can run training and inference in the cloud. See our Run training and/or inference on Colab guide! Or take a look at our other Guides about running SLEAP on remote machines.

To run training on your local machine, select “Run Training…” from the “Predict” menu. For this tutorial, let’s use the default settings for training with the “top-down” pipeline and predict on 20 random frames.


The “topdown” approach will train two models: one for locating each instance in the frame confidence maps, and one for locating the parts for each of those instances. The models will be trained in that order.

For more information about the types of models you can train, see Choosing a set of models.

When using the topdown approach, it’s a good idea to choose an anchor part which has a relatively stable position near the center of your animal. You may also want to turn on the option to “Visualize Predictions During Training” (although this will make training run a bit more slowly).

Once you hit the Run button, you should see a window which shows you a graph of training and validation loss for each model as it trains. Remember that the topdown approach trains two models, so once you’re done training the centroid model the graph will reset to show you loss while training the centered instance model.

Just for this tutorial, let’s stop each training session after about 10 epochs. This should take a minute or two for each model (assuming you have a usable GPU!), and should be good enough to get some initial predictions.

After each model is trained, inference will run and if everything is successful, you should get a dialog telling you how many frames got predictions. Frames with labels will be marked in the seekbar, so try clicking on the newly marked frames or use the “Next Labeled Frame” command in the “Go” menu to step through frames with labels.

Continue to Prediction-assisted labeling.