Embedded Design For Image Information Hiding

Digital watermarking technology, as the hottest spot of current research information hiding, the main application areas are the protection of digital works of intellectual property. But with popular of the high quality image input and output devices, especially in precision over 1200dpi color laser printer and scanner are appeared, it's much easier to forgery documents and other traditional printed materials. A tremendous opportunities appears in field of national security. Because of lacking of effective measures, making the "false", "buy a fake", "used false" rampant, which have seriously disturbed the normal economic order.To resolve the emerging problem, we propose a algorithm that can be applied to instruments, documents, and other paper-based physical security of digital watermarking algorithm. The system uses the principle that it cases less coefficients in low and middle frequency domain in process of printing and scanning, to the embedded watermark in the DFT domain; using the perspective transformation of the image correction to resist the image of the rotation attack in extracting process. So the algorithm can use the semi-fragile watermark information to identify the authenticity of documents printed which can be used to print certificates of copyright protection and all kinds of security.To facilitate works on the encrypted digital watermark information extraction identification, make digital watermarking technology to towards practical faster, this paper presents a digital watermarking technology in the embedded platform design and implementation-Watermark Reader. The system is based on TI DaVinci platform TMS320DM6446, which contains ARM and DSP dual-core, making images of high complexity and multi-IO operation operations operator interface separately; separation of logical model and control model; with high availability and maintainability; Separate logical model and control model; with a high degree of applicability and maintainability. In order to minimize image distortion on the impact of digital watermarking algorithm, the system applied for high SNR MT9M131CMOS image sensor, the industrial camera megapixels.After testing, the algorithm works well on the platform to meet the original design requirements.