Abstract

The following passages were not properly cited in the original paper. The authors apologize for this error and would like to update the paper accordingly. On page 2, lines 174–176 should read as: “The original LBP operator [23] creates labels for the image pixels by thresholding their 3 × 3 neighborhood with the center value” [36]. And lines 187–198 should read as: As pointed out in [35]: “another extension to the original operator is the definition of the so called uniform patterns, which can be used to reduce the length of the feature vector and implement a simple

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