Visual Security Assessment via Saliency-Weighted Structure and Orientation Similarity for Selective Encrypted Images

Figure 4

Confidence evaluation of all the VSAs on the IVC-SelectEncrypt database, where the pairs of the MOS values and the objective scores are plotted as black dots. The nonlinear fitting results are plotted as red dashed lines, and V_max(x), V_min(x), and C_x are plotted as blue, green, and black solid lines, respectively. (a) PSNR. (b) SSIM. (c) VIF. (d) LSS. (e) ESS. (f) LFBVS. (g) VSI-Canny. (h) The proposed VSA.

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