17. The system of claim 15 wherein the pattern matching system is further configured to: determine a second correlation value between the corresponding interpolation matrix data for a second at least two selected classes of text rows; compare the second correlation value to the threshold correlation value; and group the second at least two selected classes of text rows into a second combined class when the second correlation value is greater than the threshold correlation value.
15. The system of claim 14 wherein the pattern matching system is further configured to: determine a distance between binary average rows for the at least two selected classes of text rows when the correlation value is less than the threshold correlation value; compare the distance to a threshold distance; and group the at least two selected classes of text rows into the first combined class when the distance is less than the threshold distance.