Water mark

Watermark usually refers to a specific identifier or pattern added to media such as paper, images, or videos.
Definition and purpose: A watermark can be an identifier embedded in a medium, such as a semi transparent pattern or text on paper, used to prove its source, authenticity, or copyright. In the digital field, watermarks are also commonly used to protect the copyright of images, videos, and other content, preventing them from being illegally copied or tampered with.
Types and Applications: Watermarks come in various forms, such as paper watermarks, digital watermarks, etc. Paper watermarking is commonly used in important documents such as currency and certificates to enhance their anti-counterfeiting capabilities; Digital watermarking is widely used for copyright protection of digital content such as images and videos.
Characteristics: Watermarks usually have the characteristics of being difficult to detect, not affecting the normal use of the medium, and can be displayed in a specific way when needed to prove the authenticity or copyright ownership of the medium.
Watermark has been widely used in multiple fields and is an important means of protecting intellectual property and enhancing media authenticity