Fig. 6.

Same data as in Fig. 4a. (a) Displacement obtained by the first pass of the multiple-seed algorithm. (b) Early displacement propagation from two seeds (orange and blue), which were placed in regions of more highly correlated data than the other 18 seeds. (c)–(d) All high quality regions are subsequently propagated from the orange and blue seeds, and a third (green) seed, which grew from a fairly well-correlated region towards the left. (e)–(f) When all high quality data is exhausted, invalid seeds within the arc start to grow. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)