An Improved EMD-Based Dissimilarity Metric for Unsupervised Linear Subspace Learning

Figure 2

There are 4 different colors of rectangle for each histogram, and the value of each rectangle is 0.25. The dissimilarity in (a) is 2, while the dissimilarity in (b) is 1. When denotes the histogram above, and presents the histogram below. , .

(a) The Bin-by-Bin Dissimilarity Measure

(b) The Cross-Bin Dissimilarity Measure