Curve fitting Mathematical models 8 Error analysis 6 Active contours 4 Algorithms 4 B spline curve 4 Binding energy 4 Edge detection 4 Estimation 4 Image segmentation 4 Imaging systems 4 Least squares approximations 4 Splines 4 Activation energy 2 Aging of materials 2 Anisotropic diffusion 2 Approximation errors 2 Approximation theory 2 Asymptotic simplification 2 Asymptotic stability 2 Axial resolutions 2 B-spline 2 B-spline curves 2 B-spline representation 2 Bactericidal effects 2 Bactericides 2 Bifurcation (mathematics) 2 Binding equilibrium 2 Binding sites 2 Biogeochemistry 2