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A watermark is very useful in the examination of paper because it can be used for dating documents and artworks, identifying sizes, mill trademarks and locations, and determining the quality of a sheet of paper. The word is also used for digital practices that share similarities with physical watermarks.
To place a file in this category, add the tag {{imagewatermark}} to the bottom of the file's description page. If you are not sure which category a file belongs to, consult the file copyright tag page. If this category is very large, please consider placing your file in a new or existing subcategory. Free files can be moved to the Wikimedia ...
To upload a non-free image, use the File Upload Wizard, which will help you add all of the required information. A link to the wizard can be found under "Tools" at the left of the screen. A link to the wizard can be found under "Tools" at the left of the screen.
A digital watermark is called imperceptible if the watermarked content is perceptually equivalent to the original, unwatermarked content. [7] In general, it is easy to create either robust watermarks or imperceptible watermarks, but the creation of both robust and imperceptible watermarks has proven to be quite challenging. [2]
English Wikipedia allows non-free images to be uploaded under fair use doctrine if there is no possibility that a free image exists or will be created (think: portraits of dead people, long-past events, etc). If so, please follow the non-free content guidelines, and upload it locally to English Wikipedia only (not Wikimedia Commons).
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 ...
Free images should not be watermarked, distorted, have any credits or titles in the image itself or anything else that would hamper their free use, unless, of course, the image is intended to demonstrate watermarking, distortion, titles, etc. and is used in the related article. Exceptions may be made for historic images when the credit or title ...
Getty Images Holdings, Inc. (stylized as gettyimages) is a visual media company and supplier of stock images, editorial photography, video, and music for business and consumers, with a library of over 477 million assets.