From: Detection of shifted double JPEG compression by an adaptive DCT coefficient model
QF1 | QF2 | ||||
---|---|---|---|---|---|
 | 50 | 60 | 70 | 80 | 90 |
50 | 0.62/0.95/0.99 | 0.78/0.97/0.97 | 0.90/1.00/1.00 | 0.95/1.00/1.00 | 0.96/1.00/1.00 |
60 | 0.48/0.54/0.59 | 0.62/0.82/0.95 | 0.75/0.97/0.98 | 0.92/1.00/1.00 | 0.93/1.00/1.00 |
70 | 0.13/0.14/0.13 | 0.36/0.52/0.61 | 0.65/0.85/0.92 | 0.79/0.99/0.98 | 0.92/1.00/1.00 |
80 | 0.13/0.12/0.10 | 0.14/0.13/0.12 | 0.44/0.53/0.62 | 0.68/0.85/0.94 | 0.82/0.98/0.96 |
90 | 0.08/0.08/0.09 | 0.12/0.14/0.13 | 0.14/0.13/0.14 | 0.44/0.55/0.59 | 0.69/0.82/0.89 |