Adding VLOG output to line search.
- Previously line search was sparse in terms of debug orientated VLOG
output which made debugging failure cases difficult.
Change-Id: Idfabf74d2b3f7b8256f79dff8c6b7fcdc2fcf4d3
diff --git a/internal/ceres/low_rank_inverse_hessian.cc b/internal/ceres/low_rank_inverse_hessian.cc
index d675395..16d84c6 100644
--- a/internal/ceres/low_rank_inverse_hessian.cc
+++ b/internal/ceres/low_rank_inverse_hessian.cc
@@ -170,6 +170,10 @@
// 20(5), 863-874, 1974.
// [2] Nocedal J., Wright S., Numerical Optimization, Springer, 1999.
search_direction *= approximate_eigenvalue_scale_;
+
+ VLOG(4) << "Applying approximate_eigenvalue_scale: "
+ << approximate_eigenvalue_scale_ << " to initial inverse Hessian "
+ << "approximation.";
}
for (int i = 0; i < num_corrections_; ++i) {
