Visualizing Pairwise Fisher Discriminant

- Dataset: https://www.kaggle.com/c/digit-recognizer

- For every pair of classes (0, 1), (0, 9), , (8, 9)

- Compute the Fisher Discriminant of each pixel (feature)

o Note that some of the pixels might have a zero denominator

o Treat that as 0 Fisher

- Normalize the remaining Fisher discriminant values from 0 to 1

- Draw the Fisher images of each of the pairs of classes

- See how they make sense (e.g. Class (0, 1), (3, 5), (4, 6)).

- This is feature wise Fisher goodness of each dimension