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The Crown CA watermark found on many British Commonwealth stamps (seen from the reverse) A US postal stationery envelope from 1883 showing a clear watermark on laid paper In philately , the watermark is a key feature of a stamp, and often constitutes the difference between a common and a rare stamp.
As the name suggests, in the multi-phase watermarking process the additional constraints are inserted in multiple phases of a particular design abstraction level. For example, in High-level synthesis scheduling, hardware allocation and register allocation are used to insert a watermark. The main challenge of the multi-phase watermarking process ...
Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
A digital watermark is called semi-fragile if it resists benign transformations, but fails detection after malignant transformations. Semi-fragile watermarks commonly are used to detect malignant transformations. A digital watermark is called robust if it resists a designated class of transformations. Robust watermarks may be used in copy ...
Watermarks A watermark is a text message, or image put over an original image, and is used to protect intellectual property or specify important information, such as date when the image was taken, text comments, or copyright. Upload components can include a feature to add watermarks to all uploaded images. Exif/IPTC metadata
In January 2022, Google announced the text watermark feature to the word processor, allowing users to create or import watermarks to a document. In addition to text watermarks, image watermarks can also be added to the document. [48] [49] In July 2024, Google announced that Google Docs would begin fully supporting Markdown syntax. [50]
In the absence of visually perceptible watermarks content control can be ensured with visually imperceptible digital watermarks. [2] In some cases, the graphic also shows the name of the current program. Some television networks may place additional logos or text alongside their DOG to advertise significant upcoming programs.
An audio watermark is a unique electronic identifier embedded in an audio signal, typically used to identify ownership of copyright. It is similar to a watermark on a photograph. Digital watermarking is the process of embedding information into a signal (e.g. audio, video or pictures) in a way that is difficult to remove.
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