171 votesLibor commented
One excellent C# implementation of several optimization algorithms (including LM and L-BFGS) is provided in ALGLIB package:Libor supported this idea ·Libor commented
Here is my implementation of Levenberg-Marquardt using Math.NET and C# - feel free to use it as you like:
I have tested it on exponential rotation estimation and bundle adjustment (joint image alignment in panoramic image stitching).
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