Local binary patterns: Difference between revisions

Revision as of 00:15, 9 December 2014

Revision as of 08:33, 9 December 2014

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==Extensions==

* Transition Local Binary Patterns(tLBP):<ref>Trefný, Jirí, and Jirí Matas."Extended set of local binary patterns for rapid object detection." Proceedings of the Computer Vision Winter Workshop. Vol. 2010. 2010.</ref>: binary value of transition coded LBP is composed of neighbor pixel comparisons clockwise direction for all pixels except the central.

* Direction coded Local Binary Patterns(dLBP): the dLBP encodes the intensity variation along the four basic directions through the central pixel in two bits.

* Modified Local Binary Patterns(mLBP): the mLBP compares the values of neighboring pixels to the average of the intensity values in the 3x3 window.

* Multi-block LBP: the image is divided into many blocks, a LBP histogram is calculated for every block and concatenated as the final histogram.

* Volume Local Binary Pattern(VLBP):<ref>Zhao, Guoying, and Matti Pietikainen. "Dynamic texture recognition using local binary patterns with an application to facial expressions." Pattern Analysis and Machine Intelligence, IEEE Transactions on 29.6 (2007): 915-928.</ref>: VLBP looks at dynamic texture as a set of volumes in the (X,Y,T) space where X and Y denote the spatial coordinates and T denotes the frame index. The neighborhood of a pixel is thus defined in three dimensional space, and volume textons can be extracted into histograms.

* RGB-LBP: This operator is obtained by computing LBP over all three channels of the RGB color space independently, and then concatenating the results together.