Improving Anticompression Robustness of JPEG Adaptive Steganography Based on Robustness Measurement and DCT Block Selection

Table 2

The average and standard deviation of the percentage of changed coefficients over different rates of modification that demonstrated in Figure 3.

	QF = 75	QF = 80	QF = 85
Average (%)	0.207 0	0.230 6	0.305 2
Std. dev. (%)	0.046 7	0.041 9	0.051 7