Hi Stephan, there are 2 type of warnings in levmar.
The first one is of type #warning Linearly constrained optimization requires LAPACK and was not compiled! levmar implement different unconstrained and constrained versions of the Levenberg-Marquard algorithm. Some of the contrained version need LAPACK to work. But Hugin is only using the unconstrained version. This type of warning can therefore ignored, at least for Hugin. The second warning is #warning LAPACK not available, LU will be used for matrix inversion when computing the covariance; this might be unstable at times This warning is trigged in code which is used by Hugin. The warning states that LAPACK could help to calculate the covariance. But as far as I know Hugin is not using the returned covariance. So LAPACK could help to make it more robust. But until now I have not seen any issues when using levmar without LAPACK. The LAPACK is already in CMake, but needs explicitly activated: ## ## LAPACK (optional, enable by -DENABLE_LAPACK=ON) ## OPTION (ENABLE_LAPACK "Use LAPACK based solver in levmar" OFF) -- You received this bug notification because you are a member of Hugin Bug Hunters, which is subscribed to Hugin. https://bugs.launchpad.net/bugs/679654 Title: updated levmar library Status in Hugin - Panorama Tools GUI: Fix Committed Bug description: Last December, an updated levmar was released (2.2), with change that could be very interesting for hugin: - Fixed an error in the computation of the damping factor of levmar_dif() in lm_core.c. Thanks to John Ervin for reporting. This change is interesting, because levmar_dif is used for photometric optimisation by hugin. I took the liberty to try hugin with this newer version of the levmar library, and on my test panorama it took slightly longer but reached the same end result. This is of course not 0.7 material, but perhaps something for early 0.7.1. To manage notifications about this bug go to: https://bugs.launchpad.net/hugin/+bug/679654/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~hugin-bug-hunters Post to : hugin-bug-hunters@lists.launchpad.net Unsubscribe : https://launchpad.net/~hugin-bug-hunters More help : https://help.launchpad.net/ListHelp