TABLE 9. Performance Comparison of Different Features.

Method Name	Sen.	Spec.	Accu.
Uniform LBP [7]	79.25%	94.56%	91.50%
Hist. probability [10]	83.00%	75.69%	77.15%
Color hist [13]	90.80%	92.63%	91.97%
Stat (CMYK) [15]	95.50%	92.87%	93.40%
Word hist. [14]	91.71%	94.05%	93.31%
Raw hist. [4]	94.50%	98.95%	98.06%
Proposed CHOBS	97.85%	99.47%	99.15%