Classification and Retrieval of Multimedia Book Cloud Resources Based upon Hash Algorithm

Table 2

Comparison of selection effects of different text features.

	100	200	500	1000
CHI	62.35%	74.29%	80.12%	85.21%
IG	61.78%	72.37%	75.31%	83.77%
DF	58.46%	64.28%	70.29%	74.28%