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Figure 7
Movement calculated by distect between consecutive images plotted against the number of images. The movement in pixels calculated between each image and its predecessor is plotted on top: panels (a), (c), (e). The accumulated movement in micrometres is plotted at the bottom: panels (b), (d), (f). The conversion factor is 0.154 px µm−1. Gray vertical lines mark the range when the VTI was in movement. The average movement speed was (a)–(d) 200 µm s−1 and (e)–(f) 20 µm s−1. The image taking frequency was (a)–(b) 1 image s−1 and (c)–(f) 4.4 images s−1. |
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