Image Analysis: Volume 2 (De Gruyter Textbook) by Yujin Zhang

Author:Yujin Zhang [Zhang, Yujin]
Language: eng
Format: azw3
Publisher: De Gruyter
Published: 2017-08-07T04:00:00+00:00

where n is the number of distinct labels given by the LBP operator, I(z) is defined by

5.3.3.2Time-Space LBP

The original LBP operator can be extended to the time-space representation to perform dynamic texture analysis (DTA), which is the volume local binary pattern (VLBP) operator. It can be used for analyzing the dynamic changes of texture in 3-D(X, Y, T) space, including both motion and appearance. In the 3-D(X, Y, T) space, three sets of planes can be considered: XY, XT, YT. The three classes of LBP labels obtained are XY-LBP, XT-LBP, and YT-LBP, respectively. The first category contains spatial information, the latter two categories both contain time-space information. Three LBP histograms can be obtained from three categories of LBP labels, which can also be spanned together into a unified histogram. One example is shown in Figure 5.14. Figure 5.14(a) shows three planes of the dynamic texture. Figure 5.14(b) gives the LBP histogram for each plane. Figure 5.14(c) is the feature histogram after the stitching of three histograms.

Figure 5.13: Local primitives obtained with the LBP labels. Figure 5.14: Histogram representation of local binary pattern for a 3-D volume. Given a dynamic texture of X × Y × T: (xc ∈ {0,...,X – 1}, yc ∈ {0,...,Y – 1}, tc ∈ {0,..., T – 1}), the dynamic texture histogram can be written as:

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