Figure 7

sh _{m , n} ( f ) Distributions of the image Lena.bmp of Figure5(c1) after SDJPEG and SSJPEG. h_3,1(f) (the first row) and sh_3,1(f) (the second row) distributions for (from left to right) SDJPEG with QF₁ = 60 and QF₂ = 90 (${\mathit{\sigma }}_{3,1}^{\mathrm{SJR}}=1.03$, $\frac{{\mathit{q}}_{3,1}/2}{3{\mathit{\sigma }}_{3,1}^{\mathrm{SJR}}}=1.78$ , p = 0), SDJPEG with QF₁ = 60 and QF₂ = 70 (${\mathit{\sigma }}_{3,1}^{\mathrm{SJR}}=2.63$, $\frac{{\mathit{q}}_{3,1}/2}{3{\mathit{\sigma }}_{3,1}^{\mathrm{SJR}}}=0.70$, p = 1), SDJPEG with QF₁ = 60 and QF₂ = 60 (${\mathit{\sigma }}_{3,1}^{\mathrm{SJR}}=3.40$, $\frac{{\mathit{q}}_{3,1}/2}{3{\mathit{\sigma }}_{3,1}^{\mathrm{SJR}}}=0.54$, p = 1) and SSJPEG with QF = 90. q_3,1 = 11 for all the cases.