What are the different methods for feature extraction from an image?

What are the different methods for feature extraction from an image? – Enpatika

What are the feature extraction techniques in NLP?

Some of the most popular methods of feature extraction are : Bag-of-Words. TF-IDF.

Alternatively, general dimensionality reduction techniques are used such as:

Another successful example for feature extraction from one-dimensional NMR is statistical correlation spectroscopy (STOCSY) [41].