## [Vxl-users] Choosing an optimizer

 [Vxl-users] Choosing an optimizer From: Mathieu Malaterre - 2007-05-15 12:06:27 ```Hello, I have a signal (an image 256x256 acquired over 8 time points). I need to fit a function on those values. So for each pixel I need to run an optimizer, with 8 empirical value, and the function is : F(a,b,c) = a * ( 1 - b * exp( - t / c ) ) (t = 1..8) As far as I understand I cannot use Levenberg-Marquardt implementation in vnl since it imply expressing F(a,b,c) as the sum of 3 square functions. what's the next best option for me ? Thanks, -- Mathieu ```

 [Vxl-users] Choosing an optimizer From: Mathieu Malaterre - 2007-05-15 12:06:27 ```Hello, I have a signal (an image 256x256 acquired over 8 time points). I need to fit a function on those values. So for each pixel I need to run an optimizer, with 8 empirical value, and the function is : F(a,b,c) = a * ( 1 - b * exp( - t / c ) ) (t = 1..8) As far as I understand I cannot use Levenberg-Marquardt implementation in vnl since it imply expressing F(a,b,c) as the sum of 3 square functions. what's the next best option for me ? Thanks, -- Mathieu ```