Quantification of Hepatorenal Index for Computer-Aided Fatty Liver Classification with Self-Organizing Map and Fuzzy Stretching from Ultrasonography

Algorithm 1

Self-organizing map (SOM) learning algorithm.

Step  1. Initialize weights

       value

Step  2. Set topological neighborhood and learning rate

      Radius

      Learning rate number ()

Step  3. While the stop condition is not satisfied,

      Do Steps 4–8

Step  4. For each input

      Do Steps 5–8

Step  5. Compute distance

Step  6. Find winner neuron

Step  7. Update weights within radius

Step  8. Reduce the learning rate and radius

Step  9. Test the stop condition