A Novel Improved Reversible Visible Image Watermarking Algorithm Based on Grad-CAM and JND

<div>Image subject localization via Grad-CAM and watermarking ROI selection: (a1), (a2), and (a3) original cover image, wood rabbit, tabby, and partridge; (b1), (b2), and (b3) subject localization heatmap; (c1), (c2), and (c3) binarized R channel of heatmap with central coordinate of ROI; (d1), (d2), and (d3) ROI for watermark embedding with (<i>r</i>) = 2.</div>

Security and Communication Networks

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Figure 2: A Novel Improved Reversible Visible Image Watermarking Algorithm Based on Grad-CAM and JND 