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  2. Digital watermarking - Wikipedia

    en.wikipedia.org/wiki/Digital_watermarking

    Digital watermarking. A digital watermark is a kind of marker covertly embedded in a noise-tolerant signal such as audio, video or image data. [1] It is typically used to identify ownership of the copyright of such a signal. Digital watermarking is the process of hiding digital information in a carrier signal; the hidden information should, [2 ...

  3. Watermark - Wikipedia

    en.wikipedia.org/wiki/Watermark

    It is a shaded watermark first used in 1848 that incorporates tonal depth and creates a greyscale image. Instead of using a wire covering for the dandy roll, the shaded watermark is created by areas of relief on the roll's own surface. Once dry, the paper may then be rolled again to produce a watermark of even thickness but with varying density.

  4. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  5. Digital on-screen graphic - Wikipedia

    en.wikipedia.org/wiki/Digital_on-screen_graphic

    A digital on-screen graphic, digitally originated graphic (DOG, bug, [1] network bug, or screenbug) is a watermark-like station logo that most television broadcasters overlay over a portion of the screen area of their programs to identify the channel. They are thus a form of permanent visual station identification, increasing brand recognition ...

  6. Wikipedia:Image use policy - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Image_use_policy

    In general, if the image cannot be reused (including with redistribution and modification rights) by any entity, including commercial users, then the image must be considered non-free. Use of copyrighted material under an invalid claim of a non-free rationale constitutes copyright infringement and is illegal.

  7. Wikipedia:How to create a page - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:How_to_create_a_page

    Creation is simple: upon clicking a red link, you will be transported to a blank page. Once there, enter any text and then click the Publish changes button. That's it; the page should have been created. Many pages are created after a user sees an existing red link on a page, and then follows these steps.

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