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2. 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.

3. Digital watermarking - Wikipedia

   en.wikipedia.org/wiki/Digital_watermarking

   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 ...

4. Category:Images with watermarks - Wikipedia

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

   This should still not be done unless the text is within the image itself and not located on a border or along an edge. If cropping a JPEG, consider using a lossless cropping tool such as jpegtran Caution: Before removing a watermark from a copyrighted image, please read the WMF's analysis of the legal ramifications of doing so.

5. Digital on-screen graphic - Wikipedia

   en.wikipedia.org/wiki/Digital_on-screen_graphic

   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. For example, broadcasters of the Olympic Games often add the Olympic rings to their DOG for a period of time leading up to—and during—the Games.

6. Watermark (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/Watermark_(disambiguation)

   A watermark is a recognizable image or pattern in paper used to determine ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...

7. Watermark (data file) - Wikipedia

   en.wikipedia.org/wiki/Watermark_(data_file)

   If the data file to be retrieved is an image, the provider can embed a watermark for protection purposes. The process allows tolerance to some change, while still maintaining an association with the original image file. Researchers have also developed techniques that embed components of the image within the image.