What Is Digital Watermarking?
Digital Watermark (Digital Watermark) A type of protection information embedded in a carrier file using a computer algorithm. [1] Digital watermarking technology is a content-based, non-cryptographic mechanism-based computer information hiding technology. It is to embed some identification information (that is, digital watermark) directly into digital carriers (including multimedia, documents, software, etc.) or indirectly (modify the structure of specific areas), and it does not affect the use value of the original carrier and is not easily Detect and modify again. But it can be identified and identified by the producer. Through the information hidden in the carrier, the purpose of confirming the content creator, purchaser, transmitting secret information or judging whether the carrier has been tampered with can be achieved. Digital watermarking is an effective method to protect information security, to achieve anti-counterfeiting traceability, and copyright protection.
digital water mark
- Divided by characteristics
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- digital
- In recent years,
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- Imperceptible or Transparency-the original image is embedded in digital
- Digital watermarking technology is developed from information hiding technology. It is an interdisciplinary field of digital signal processing, image processing, cryptographic applications, algorithm design and other disciplines. Digital watermarking was first proposed by Tirkel et al. In 1993. The first watermarking article entitled "Electronic watermark" was published at an international academic conference. The concept and possible applications of digital watermarking were proposed. Two algorithms for embedding a watermark into the least significant bit of the image are presented. The first International Symposium on Information Hiding was held at the Newton Institute in Cambridge, UK in 1996, marking the birth of information hiding.