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. 2020 Jan 14;20(2):459. doi: 10.3390/s20020459

Figure 1.

Figure 1

The result of a multi-scale Top-hat transform. (a) Enhanced image before Top-hat transform. (b) 3 × 3 Top-hat transform. (c) 5 × 5 Top-hat transform. (d) 7 × 7 Top-hat transform. (e) Image after multi-scale Top-hat transform.