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| Block size | Histogram Bin | Sen. | Spec. | Accu. |
|---|---|---|---|---|
| 7 by 7 | 8 | 46.17% | 87.42% | 79.49% |
| 16 | 79.46% | 95.89% | 92.72% | |
| 32 | 79.61% | 95.95% | 92.81% | |
| 64 | 85.03% | 96.79% | 94.55% | |
| 128 | 88.88% | 98.36% | 96.60% | |
| 256 | 93.09% | 98.74% | 97.66% | |
| 512 | 94.22% | 99.22% | 98.26% | |
| 1024 | 94.55% | 99.26% | 98.34% | |
| 2048 | 95.56% | 99.64% | 98.89% | |
| 4096 | 97.16% | 99.58% | 99.11% |
