Information Technology Reference
In-Depth Information
Modules
Output
Data
Integration
Fig. 6.37
A modular neural network
TouseaMNN,threestageshavetobeconsidered:
•
The task decomposition, where the problem is divided into smaller prob-
lems, each one to be presented to one of the modules or expert networks.
To better understand the task decomposition process let us take a look
at the artificial dataset shown in Fig. 6.38. This is a three-class problem
where the input space is clearly divided into two regions: one of the regions
(upper right) contains samples from two classes (crosses and circles) and
the other contains samples from all three classes. Note that there are two
classes with samples belonging to the two different regions. By having a
classifier dedicated to each region we are able to transform this particular
problem into two simpler ones.
Fig. 6.38
The partition of the input space for a three-class problem.
