The network that started the deep learning boom learned from 1.2 million photos, each one labeled by a person.
F6 · Data Is the Model
Change the data and the model changes more than any tweak to the network can manage. This chapter turns tables, photos and sentences into rows of numbers, then cleans them without lying about them. You will meet leakage, the bug that makes a model look brilliant until the day it ships, and the rare class, the reason 99% accuracy can be worthless. It ends with the human side: who labeled this, what it cost, who agreed to be in it, and what the card that ships with the data should say.
- Rows, Features, Labels
- Pictures and Words as Rows
- Where Labels Come From
- Cleaning Without Lying
- The Holes in the Table
- Three Piles
- The Answer That Slipped In
- When Tomorrow Is Different
- The One Case Accuracy Hides
- More Data Without New Facts
- Who Is in the Table?
- The Card That Ships With the Data