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Real-Time Rotation Estimation Using Histograms of Oriented Gradients

Figure 6

Reference set adjustment.

Each of the training samples contributes to the reference set on local interval . For illustration purposes, angles with multiple representations are colored. Acquisition of unlabeled training images is usually trivial, thus an arbitrary number of feature representations can be obtained at every angle.

Figure 6

doi: https://doi.org/10.1371/journal.pone.0092137.g006