Blockchain Technology Company Files Patent for "Image Digital Watermarking Embedding and Extraction Method," Enhancing Digital Copyright Protection

Blockchain Technology Company Files Patent for "Image Digital Watermarking Embedding and Extraction Method," Enhancing Digital Copyright ProtectionOn December 9, 2024, the State Intellectual Property Office of China (SIPO) revealed that Blockchain New Technology (Guangzhou) Co., Ltd

Blockchain Technology Company Files Patent for "Image Digital Watermarking Embedding and Extraction Method," Enhancing Digital Copyright Protection

On December 9, 2024, the State Intellectual Property Office of China (SIPO) revealed that Blockchain New Technology (Guangzhou) Co., Ltd. submitted a patent application for an "Image Digital Watermarking Embedding and Extraction Method and Apparatus," with publication number CN119090698A and an application date of September 2024. The core of this patented technology is a novel method for embedding and extracting digital watermarks in images, aiming to enhance the reliability and security of digital image copyright protection.

The patent abstract details the specific implementation method. The method first performs a Discrete Cosine Transform (DCT) on the original image, then embeds the digital watermark information into the transformed image data. To further enhance the watermark's invisibility and security, the method cleverly introduces a correction template embedding technique. By embedding the correction template information along with the watermark information, the presence of the watermark is effectively hidden, making it imperceptible and thus improving image security.

The patent application emphasizes the crucial role of the randomly generated template vector p1 in enhancing watermark security. This vector's randomness ensures that only with knowledge of its specific value can the embedded watermark information be correctly extracted. This randomness effectively prevents unauthorized access and tampering with the watermark information, greatly improving its security.

In addition to the random template vector p1, the method introduces a fixed matrix p2 as an additional security layer. The inclusion of the fixed matrix p2 further enhances the watermark's robustness, making it more difficult for malicious attackers to remove or destroy. This combination of dual security mechanisms constitutes a robust watermark protection system, effectively guaranteeing the integrity and security of digital image copyrights.

Regarding watermark extraction, the patent application also proposes an extraction algorithm corresponding to the embedding method. This algorithm first utilizes the correction template technique to correct for potential geometric transformations of the image. This technique can effectively detect and correct geometric distortions, such as rotation and scaling, that may occur during image transmission or processing. If geometric transformations are detected, the algorithm automatically performs an inverse geometric transformation to restore the image to its original state before watermark extraction. This step ensures accurate watermark extraction even if the image has undergone geometric transformations.

A significant feature of this technology is its extremely high watermark extraction accuracy. The patent application indicates that the method's watermark extraction accuracy can be controlled within an 8% error rate. This high accuracy is maintained regardless of which color channel of a color image the watermark information is embedded in. This high accuracy ensures reliable digital copyright protection in practical applications.

The innovation of this technology lies in its combination of DCT transformation, correction template embedding, and the use of both a random template vector and a fixed matrix, forming a multi-layered security protection mechanism. This multi-layered mechanism effectively counteracts various potential attacks, such as cropping, compression, and noise interference, significantly improving watermark robustness.

Compared with traditional digital watermarking technologies, this patented technology demonstrates significant advantages in security, robustness, and extraction accuracy. Its high security effectively prevents unauthorized access and tampering, while its high robustness ensures watermark integrity under various image processing operations. The extremely high extraction accuracy ensures reliable digital copyright protection in practical applications.

In conclusion, the patent application by Blockchain New Technology (Guangzhou) Co., Ltd. for the "Image Digital Watermarking Embedding and Extraction Method and Apparatus" provides a new and effective technical solution for digital image copyright protection. This technology, with its high security, robustness, and accuracy, is expected to be widely applied in the field of digital copyright protection, providing strong technical safeguards for digital assets. Its innovative multi-layered security mechanism will effectively enhance the copyright protection capabilities of digital images, providing more reliable technical support for the development of the digital economy. The successful research and application of this technology also reflect China's continuous progress and innovation in the field of digital copyright protection technology. Its applications are wide-ranging, benefiting digital artwork, photography, medical imaging, and more, playing an important role in the future development of the digital economy. With further maturation and refinement, this technology will provide even stronger protection for digital copyrights and promote the healthy development of the digital economy.