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2. Digital watermarking - Wikipedia

   en.wikipedia.org/wiki/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] but does not need to ...

3. Watermark - Wikipedia

   en.wikipedia.org/wiki/Watermark

   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 ...

4. 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 ...

5. Category:Free photo software - Wikipedia

   en.wikipedia.org/wiki/Category:Free_photo_software

   Free software portal. Wikimedia Commons has media related to Free photo software. This is a category of articles relating to photo software which can be freely used, copied, studied, modified, and redistributed by everyone that obtains a copy: "free software" or "open-source software". Typically, this means software which is distributed with a ...

6. VueScan - Wikipedia

   en.wikipedia.org/wiki/VueScan

   VueScan. VueScan is a computer program for image scanning, especially of photographs, including negatives. [4] It supports optical character recognition (OCR) of text documents. [5][6] The software can be downloaded and used free of charge, but adds a watermark on scans until a license is purchased.

7. Darktable - Wikipedia

   en.wikipedia.org/wiki/Darktable

   Darktable (stylized as darktable) is a free and open-source photography application and raw developer. Rather than being a raster graphics editor like Adobe Photoshop or GIMP, it comprises a subset of image editing operations specifically aimed at non-destructive raw image post-production. It is primarily focused on improving a photographer's ...