From Wikipedia, the free encyclopedia
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)(Learn how and when to remove this template message)
Definition and formulation
The Babel function of a dictionary with normalized columns is a real-valued function that is defined as
When p=1, the babel function is the mutual coherence.
- Joel A. Tropp (2004). "Greed is good: Algorithmic results for sparse approximation". CiteSeerX: 10
.1 .1 .84 .5256.
- Just Relax: Convex Programming Methods for Identifying Sparse Signals in Noise