Week – 1 Feature extraction from text and images >>> How to Win a Data Science Competition: Learn from Top Kagglers
1. Select true statements about n-grams
2. Select true statements.
3. Suppose in a new competition we are given a dataset of 2D medical images. We want to extract image descriptors from a hidden layer of a neural network pretrained on the ImageNet dataset. We will then use extracted descriptors to train a simple logistic regression model to classify images from our dataset.
We consider to use two networks: ResNet-50 with imagenet accuracy of X and VGG-16 with imageNet accuracy of Y (X < Y). Select true statements.
4. Data augmentation can be used at (1) train time (2) test time