Table 3.

Pixel totals resulting from different under-sampling methods

Pixel count after the method	% of positive class	% of negative class (the majority class)	Total count (training samples)
Original image (exclude border)	5.559	94.441	25,002,241
Uniform Under-Sampling	19.611	80.489	7,087,635
Unsupervised Under-sampling	34.663	65.338	4,010,003
Tomek links	34.677	65.323	4,000,602
Cluster centroid	50.000	50.000	832,000