Table 5 Accuracy obtained by the proposed approach on BOSSBase [31] dataset with different patch size and QF1/QF2
From: Estimating Previous Quantization Factors on Multiple JPEG Compressed Images
Images | Size | Patch size | % | QF1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
QF2 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | ||||
10000 | 512X512 | 512X512 | 100% | 90 | 0,99 | 0,99 | 0,99 | 0,99 | 0,99 | 0,99 | 0,66 | 0,47 | 0,37 |
512X512 | 100% | 80 | 0,96 | 0,96 | 0,99 | 0,98 | 0,41 | 0,76 | 0,36 | 0,41 | 0,33 | ||