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. Author manuscript; available in PMC: 2010 May 4.
Published in final edited form as: Inf Process Med Imaging. 2007;20:519–531. doi: 10.1007/978-3-540-73273-0_43

Fig. 4.

Fig. 4

Reconstruction error when using only the first k vectors of the basis. The numbers in parentheses denote the number of vectors required to capture 90% of variation in the data set. LoCA bases are compared with S-PCA bases which have essentially the same reconstruction error for 10, 15, or 26 vectors respectively. These choices correspond to the different λ settings used in Figure 2. Using fewer vectors, S-PCA has lower reconstruction error because the first few S-PCA vectors represent global deformations (as seen in Figure 2).