Least-median-of-squares Fitting

Can anyone please help me with the algorithm for Least-median-of-squares fitting...I am trying to use it for the optic disc segmentation in retinal images?

Answer 1

[Image Analyst]

I never heard of it, though that's not surprising since there are hundreds of papers published every year, each with a unique newly invented filter. You must have heard of it somehow, such as a scientific article or web page. Where was it, and was it not explained in sufficient detail for you to translate the algorithm into MATLAB code?

[Jamuna Jayashri Mahalingam]

Actually it just appeared in the Literature review of the paper "Locating the Optic Nerve in a Retinal Image using the Fuzzy Convergence of the Blood Vessels" by Hoover and Goldbaum.So I just wanted to ask what it actually meant and how it was used in the context of Retinal Image processing.

Answer 2

[Marco Riani]

Least-median-of-squares fitting is implemented in function LXS of the FSDA toolbox.

https://www.mathworks.com/matlabcentral/fileexchange/72999-fsda

At the web address

http://rosa.unipr.it/FSDA/LXS.html

you can find the HTML documentation of this function