一种块簇网点数字水印的生成方法、系统、设备及介质
By splitting the halftone unit into sub-halftone units and clustering them into halftone dots, the problems of watermark boundary misalignment and ghosting in high-resolution images are solved, achieving a high-definition and highly concealed watermark hiding effect.
CN118521454BActive Publication Date: 2026-07-17XIDIAN UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIDIAN UNIV
- Filing Date
- 2024-06-13
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing technologies, digital image watermarking techniques based on phase modulation suffer from watermark boundary misalignment and ghosting in high-resolution images, affecting the image's concealment and clarity.
Method used
The halftone unit is divided into several sub-halftone units, and the sub-half dots are clustered into a block cluster of dots with a predetermined geometry. High-resolution target images are generated through halftone coding and edge compensation techniques.
Benefits of technology
It improves the precision and concealment of watermarks, solves the problems of watermark boundary misalignment and ghosting in high-resolution images, and realizes high-quality image printing and large-capacity watermark information hiding.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN118521454B_ABST
Abstract
本发明属于图像处理技术领域，本发明公开了一种块簇网点数字水印的生成方法、系统、设备及介质，将原始图像的网目调单元拆分成若干子网目调单元，将水印信息编码到目标图像，通过聚集得到块簇网点；依据块簇网点所含水印信息调整网点编码，编码印版中的块簇网点，根据块簇网点形状，生成相应的网点聚集块；标定水印边缘，分析块簇网点情形模式，并补偿量均匀施加到块簇网点的所有子网点中，得到标定的子网点坐标；调幅加网，生成最终的目标图像。本发明提高了嵌入水印的目标图像的精细程度，同时通过将网点聚集为预定几何形状，有效解决了在高分辨图像中隐藏低线数调幅水印的问题，能够得到具有良好视觉效果的目标图像。
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