PubMed Central, Fig. 1: Med Image Comput Comput Assist Interv. 2012; 15(Pt 2): 163–70. doi: 10.1007/978-3-642-33418-4

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Fig. 1. Quantitative evaluation of registration accuracy

Box-and-whisker plot of registration errors (unit: millimetres) for the 4 compared methods (M₁ to M₄). The errors and the error dispersal are much smaller for M₃ compared to M₁ and M₂; M₄ is also slightly worse than M₃, which suggests that M₄ actually degrades the results compared to M₃ when initialised with M₃.