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Primal and mixed finite element methods for image registration

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Figure 2.1. Synthetic images used in numerical tests: (a) Reference image, (b) Target image.
Figure 2.2. Errors vs. N for the primal formulation N e 0 (u h ) r 0 (u h ) e(u h ) r(u h ) 50 1.66E-3 — 2.06E-2 — 162 6.23E-4 1.42 1.19E-2 0.80 578 2.02E-4 1.62 6.18E-3 0.94 2178 5.55E-5 1.86 3.08E-3 1.01 8450 1.16E-5 2.26 1.55E-3 0.99
Figure 2.3. Errors vs. N for the mixed formulation
Figure 2.5. Registration results and comparison for α = µ = λ = 0.5. (a) Reference image R
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