It is very important to define the training material for a recogniser . This means specifying
For many purposes, the training and testing sessions are integrated in an overall procedure. For example, the purpose may be tuning the specific recogniser parameters for maximum performance under certain conditions. In this case, it is recommended to split off a certain fraction (typically ) of the training material and use that for the development test .
In such case, one can actually alter the composition of the
development test part of the training material from time to time, in
order to prevent ``training for the development test material''.
for an actual benchmark of the performance of the system with the
final settings of the parameters, unseen test material should be used.
For the purpose of tuning parameters of the recogniser , select a part of the training material as test material. Change this selection from time to time.