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. Author manuscript; available in PMC: 2013 Oct 19.
Published in final edited form as: Neural Comput. 2012 Aug 24;24(11):2852–2872. doi: 10.1162/NECO_a_00353

Figure 5.

Figure 5

HDA achieves error – sparsity tradeoff comparable with LBI, LCA and RDA. (a) Representative dictionary elements learned from whitened natural image patches. (b) Tradeoff for a typical natural image patch and (c) Mean tradeoff for an ensemble of 1000 contrast normalized image patches.