Color Zero-Watermarking Algorithm for Medical Images Based on BEMD-Schur Decomposition and Color Visual Cryptography

Figure 4

Carrier images and copyright watermark:(a) Fundus1, (b) Fundus2, (c) Fundus3, (d) Fundus4, (e) Cerebral1, (f) Cerebral2, (g) Cerebral3, (h) Cerebral4, (i) Color logo image, (j) Color zero-watermark.

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