Increasing the Number of Trained Characters

In the previous runs, we had trained 11 characters. In this run, we increased the number of trained characters to 25 by adding 14 of the 100 most common Chinese characters to the 11 used in the prior runs.

The chart below shows precision, recall, and F-score for different values of selection threshold with the target window size 48x48. The best F-score is .57 at threshold = 160. This is a slightly lower max F-score than the case where only 11 characters are trained.