FIFA: Fast Inference Approximation for Action Segmentation

Understand

We introduce FIFA, a fast approximate inference method for action segmentation and alignment.

• Unlike previous approaches, FIFA does not rely on expensive dynamic programming for inference.
• Instead, it uses an approximate differentiable energy function that can be minimized using gradient-descent.
• FIFA is a general approach that can replace exact inference improving its speed by more than 5 times while maintaining its performance.