Simplify the implementation to convert from BlockSparseMatrix to CompressedRowSparseMatrix. Since the conversion from BlockSparseMatrix to CompressedRowSparseMatrix is not used in any performance-critical context, this CL simplifies it by re-using existing conversions. Change-Id: I51263bc95cc056efb31961ccda548cd7be35b2a4
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.
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