Figures & data
Figure 1. Shadow removing pre-processing. Thin streak of shadow can still be seen in (c), which is then removed in (d).
![Figure 1. Shadow removing pre-processing. Thin streak of shadow can still be seen in (c), which is then removed in (d).](/cms/asset/bb0a09c8-96ee-450c-b88c-3fe24cf42f6f/tfls_a_1412361_f0001_c.jpg)
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Open access
Figure 1. Shadow removing pre-processing. Thin streak of shadow can still be seen in (c), which is then removed in (d).
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