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  2. Watermark - Wikipedia

    en.wikipedia.org/wiki/Watermark

    For example, watermark fluid may be applied to the back of a stamp to temporarily reveal the watermark. [4] Even using the simple watermarking method described, it can be difficult to distinguish some watermarks. Watermarks on stamps printed in yellow and orange can be particularly difficult to see.

  3. Category:Images with watermarks - Wikipedia

    en.wikipedia.org/.../Category:Images_with_watermarks

    You may request improvements at the Graphic Lab workshops: . Illustration workshop : For improvement of non-photographical images such as graphics, diagrams, etc. ...

  4. Digital watermarking - Wikipedia

    en.wikipedia.org/wiki/Digital_watermarking

    The evaluation of digital watermarking schemes may provide detailed information for a watermark designer or for end-users, therefore, different evaluation strategies exist. Often used by a watermark designer is the evaluation of single properties to show, for example, an improvement.

  5. Printer tracking dots - Wikipedia

    en.wikipedia.org/wiki/Printer_tracking_dots

    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 ...

  6. Digital on-screen graphic - Wikipedia

    en.wikipedia.org/wiki/Digital_on-screen_graphic

    Watermarks present an issue when archival videos are used for a documentary that strives to create a coherent story. In some cases, watermarks are blurred or digitally removed if possible to clean up the picture. In the absence of visually perceptible watermarks content control can be ensured with visually imperceptible digital watermarks. [2]

  7. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    The watermarks imbedded the logo U S P S into the paper in double-lined letters. The Bureau's definitive issues of the 1890s consisted of 13 different denominations ranging from 1 cent to 5 dollars, and may be differentiated by the presence or absence of this watermark, which would appear on all U. S. Postage stamps between 1895 and 1910. [21]

  8. Security printing - Wikipedia

    en.wikipedia.org/wiki/Security_printing

    True watermark. A true watermark is a recognizable image or pattern in paper that appears lighter or darker than surrounding paper when viewed with a light from behind the paper, due to paper density variations. A watermark is made by impressing a water coated metal stamp or dandy roll onto the paper during manufacturing.

  9. For position only - Wikipedia

    en.wikipedia.org/wiki/For_position_only

    Because of the risk that placeholder material might accidentally be published, it is clearly marked with an FPO indicator in the form of a simulated watermark or overprint, stamp, or the like in the expectation that it will make the placeholder's presence obvious to designers working on the layout; reviewing proof copies; or, as a last resort ...

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