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In case of a photograph or screenshot, you must also own the copyright for all copyright-protected items (e.g. statue or app) that appear in it (example, see below for details). Freely licensed: You can prove that the copyright holder has released the image under an acceptable free license (example, see below for details). Note that images that ...
A digital watermark is called semi-fragile if it resists benign transformations, but fails detection after malignant transformations. Semi-fragile watermarks commonly are used to detect malignant transformations. A digital watermark is called robust if it resists a designated class of transformations. Robust watermarks may be used in copy ...
The basic design of how graphics are represented in PDF is very similar to that of PostScript, except for the use of transparency, which was added in PDF 1.4. PDF graphics use a device-independent Cartesian coordinate system to describe the surface of a page. A PDF page description can use a matrix to scale, rotate, or skew graphical
The most important things to remember are that all creative work generates a new copyright by default, and the absence of a copyright notice does not mean it is in the public domain. A common misunderstanding is that works that have been made available to the public are in the public domain, or can be used for any purpose; this is not the case.
The copyright notice must also contain the year in which the work was first published (or created), and the name of the copyright owner, which may be the author (including the legal author/owner of a work made for hire), one or more joint authors, or the person or entity to whom the copyright has been transferred.
The author, or the licensor in case the author did a contractual transfer of rights, needs to have the exclusive rights on the work. If the work has already been published under a public license, it can be uploaded by any third party, once more on another platform, by using a compatible license, and making reference and attribution to the original license (e.g. by referring to the URL of the ...
A Wikimedia Foundation brochure in PDF form that introduces newcomers to Wikimedia Commons and how they can contribute to it. Uploading images to Wikipedia is a matter of: clearly establishing that the copyright status of each intended upload is appropriate for a free-content encyclopedia; and then
Photography workshop : For improvement of photography-related imagery including macro, digital, and monochrome photography. Map workshop : For improvement of maps and cartography. Related categories
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