Research Article
Dictionary Learning Based on Nonnegative Matrix Factorization Using Parallel Coordinate Descent
Table 2
Comparisons of
(
)-based sparsity, Hoyer's sparsity (based on (
13)), relative error (based on (
14)), and runtime for SNMF, NMFSC, NMF
-H, and PCDDL.
| | Algorithm | () | Sparsity | Relative error | Time (s) |
| | SNMF | 96.65 | 0.4314 | 0.9904 | 940 | | NMFSC | 8.00 | 0.9490 | 0.2520 | 415 | | NMF-H | 8.33 | 0.8957 | 0.1852 | 662 | | PCDDL | 8.00 | 0.9447 | 0.2925 | 28 |
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