Allow LocalParameterizations to have zero local size. Local parameterizations with zero tangent/local size will cause the corresponding parameter block to be treated as constant. https://github.com/ceres-solver/ceres-solver/issues/347 Change-Id: I554a2acc420f5dd9d0cc7f97b691877eb057b2c0
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.