稀疏编码
From Ufldl
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初译：@寅莹 | 初译：@寅莹 | ||
| - | 一审：@大黄蜂的思索 | + | ==一审：@大黄蜂的思索== |
Sparse coding is a class of unsupervised methods for learning sets of over-complete bases to represent data efficiently. The aim of sparse coding is to find a set of basis vectors <math>\mathbf{\phi}_i</math> such that we can represent an input vector <math>\mathbf{x}</math> as a linear combination of these basis vectors: | Sparse coding is a class of unsupervised methods for learning sets of over-complete bases to represent data efficiently. The aim of sparse coding is to find a set of basis vectors <math>\mathbf{\phi}_i</math> such that we can represent an input vector <math>\mathbf{x}</math> as a linear combination of these basis vectors: | ||
