Topologically Ordered Feature Extraction Based on Sparse Group Restricted Boltzmann Machines

Figure 6

Ten fine-art paintings with the same topic (the Flying Apsara art) but created at different periods. (a) Five fine-art paintings created at the period of Northern Wei (439–535 A.D.) and Western Wei (535–556 A.D.). (b) Five fine-art paintings created at the period of Western Wei (535–556 A.D.) and Northern Zhou (556–581 A.D.).

(a)

(b)