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Watermark. A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the paper. [1] Watermarks have been used on postage stamps, currency, and other ...
A digital watermark is called imperceptible if the original cover signal and the marked signal are perceptually indistinguishable. A digital watermark is called perceptible if its presence in the marked signal is noticeable (e.g. digital on-screen graphics like a network logo, content bug, codes, opaque images). On videos and images, some are ...
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 ...
Printer tracking dots. 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 copiers produce on every printed page that identifies the specific device that was used to print the document.
See This page for a tutorial on how to use Commons. Third is the adding of the image to the article. To do so, you would add the following code to the article: [ [File:IMAGENAMEHERE.jpg|thumb|right|CAPTIONTEXTGOESHERE]] First is the file name. Second is the word "thumb" which indicates that the image is a thumbnail; which allows for appropriate ...
Nitro PDF Reader: Extracts Images in original resolution. PDF-XChange: PDF Tools and PDF-XChange print driver allow conversion from many formats to PDF. A "lite" version of the print driver is free for non-commercial (home and academic) but places a watermark on documents; Qiqqa: Converts Microsoft Word document and Web Pages to PDF.
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