Self-embedding Image Watermarking based on Combined Decision Using Pre-offset and Post-offset Blocks

• 作者: Daofu Gong Haoyu Lu Yan Chen Yibing Han Zhenyu Li
• 来源期刊: 计算机、材料和连续体(英文)
• 学科: 工学
• 关键词: Fragile WATERMARKING SELF-EMBEDDING OFFSET block TAMPER recovery random tampering
• 年，卷（期）: 2018,（11）
• 页码范围: 243-260
• 页数: 18页
• 分类号: TN9

摘要

To detect and recover random tampering areas,a combined-decision-based self-embedding watermarking scheme is proposed herein.In this scheme,the image is first partitioned into 2×2 size blocks.Next,the high 5 bits of a block’s average value is embedded into its offset block.The tampering type of block is detected by comparing the watermarks of its pre-offset and post-offset blocks.The theoretical analysis and experiments demonstrate that the proposed scheme not only has a lower ratio of false detection but also better performance with regard to avoiding random tampering.