For start-up projects, I need a non-linear optimization C++ library, especially Levenberg Marquardt algorithm. I found two candidates: levmar and Eigen::LevenbergMarquardt.
In terms of examples, levmar provides good examples homest while Eigen::LevenbergMarquardt does poor one in their package /eigen/unsupported/test/NonLinearOptimization.cpp.
I tried both of them. First impression is levmar is better. Once I understand the structure of the Eigen::LevenbergMarquardt, I'm feeling Eigen::LevenbergMarquardt is more easy to customize.
