# Lambda parameter in LevenbergMarquardtOptimizer

**URL:** https://discourse.itk.org/t/lambda-parameter-in-levenbergmarquardtoptimizer/577
**Category:** Beginner Questions
**Created:** [January 8, 2018, 11:28am UTC](https://discourse.itk.org/t/lambda-parameter-in-levenbergmarquardtoptimizer/577 "2018-01-08T11:28:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Anna](https://discourse.itk.org/letter_avatar_proxy/v4/letter/a/779978/32.png) [@Anna](https://discourse.itk.org/u/Anna)
#### Post date: [January 8, 2018, 11:28am UTC](https://discourse.itk.org/t/lambda-parameter-in-levenbergmarquardtoptimizer/577/1 "2018-01-08T11:28:01Z")

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Hi,  
I’m quite new in ITK and I’m getting in trouble with the optimizer parameters. I’m registering two point clouds in the 3D space, the transformation model is Bspline while the metric used is the euclidean distance between the point clouds. I would like to change the lambda (or damping parameter) of the LM optimizer in order to try with different initialization, since the results I’m having are not so good. Thanks for your help and best regards 🙂