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. 2019 Jan 20;19(2):410. doi: 10.3390/s19020410

Figure 2.

Figure 2

Demonstration of our preprocessing step: (a) input face image from NUAA dataset [16]; (b) detected face region on input face image using ERT method; (c) face region is aligned using center points of face, left and right eyes; (d) final extracted face region.