Research Article

Smartphone-Based Cognitive Assistance of Blind People in Room Recognition and Awareness

Figure 3

Spectrograms of room type in the academic building of C. S (UoP). (a) Classroom, (b) conference room, (c) faculty office, (d) hall, (e) laboratory, (f) library, (g) waiting room, (h) server room, and (i) bathroom.
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(b)
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(d)
(e)
(f)
(g)
(h)
(i)