CODEWITHSUNDEEP
image-processingmachine-learningsparse-matrix
lenhhoxung
lenhhoxung

Reputation: 2756

Explanation of sparse coding

I'm studying the classification based on sparse coding and dictionary learning. I've read many documents but couldn't find an easy-to-understand one. As I understand, it's based on an optimization problem: enter image description here

What's the meaning of the subscript (2)? And I guess the sign ||a|| means the amplitude of the vector? And could you please suggest a good tutorial/introduction document for sparse coding? Thank you. (I tagged "image processing" and "machine learning" because I read somewhere that these fields use sparse coding. If not true, please comment and I'll remove the tags).

Upvotes: 2

Views: 313

Answers (2)

Gurumonster
Gurumonster

Reputation: 1

The subscript 2 means it's a l2 or Euclidean norm. See here for detailed explaination.

This is an high-level overview of sparse coding,

Upvotes: 0

Ibraim Ganiev
Ibraim Ganiev

Reputation: 9390

It's just definition of Mean-Squared Error

Upvotes: 1

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