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Table 10 Classification accuracy taking into account different similarity measures used by -nearest neighbors algorithm. The similarity measure based on Bhattacharyya coefficient outperforms the other similarity measures in terms of classification accuracy.

From: Exploiting Textons Distributions on Spatial Hierarchy for Scene Classification

Similarity measure Accuracy
Bhattacharyya 75.07
Absolute difference 71.30
Kullback-Leibler 71.14
Jeffrey 71.28
Euclidean 56.14