Fig. 5From: A recent survey of self-embedding fragile watermarking scheme for image authentication with recovery capabilityIllustration of 8 × 8 mapping block. a Original image block mapping. b Mapping block using a pseudorandom sequence with key = 77. c Mapping block using 1-D linear transformations with key = 77. d Mapping block using a pseudorandom sequence with key = 6. e Mapping block using 1-D linear transformations with key = 6Back to article page