Figure 7.

Visualization of $LB{P}_{8,1}^{u2}$ and $LB{P}_{8,1}^{\neg u2}$ on example level-0 images. All $LB{P}_{8,1}^{\neg u2}$ are shown in red in the 2nd row, and the individual $LB{P}_{8,1}^{\neg u2}$ codes are shown in gray-level in the 3rd row. We find that although $LB{P}_{8,1}^{\neg u2}$ patterns have low counts, most of them reside in the important contours and can therefore be useful for discrimination.