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Text in PDF is represented by text elements in page content streams. A text element specifies that characters should be drawn at certain positions. The characters are specified using the encoding of a selected font resource. A font object in PDF is a description of a digital typeface.
PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
The first web accessibility guideline was compiled by Gregg Vanderheiden and released in January 1995, just after the 1994 Second International Conference on the World-Wide Web (WWW II) in Chicago (where Tim Berners-Lee first mentioned disability access in a keynote speech after seeing a pre-conference workshop on accessibility led by Mike Paciello).
Starting with version 1.4 of the PDF standard (Adobe Acrobat version 5), transparency (including translucency) is supported. Transparency in PDF files allows creators to achieve various effects, including adding shadows to objects, making objects semi-transparent and having objects blend into each other or into text.
Wikipedia's first true logo was an image originally submitted by Bjørn Smestad – under the username Bjornsm – for a Nupedia logo competition which took place in 2000. [5] It was used provisionally as Wikipedia's logo until the end of 2001. [6] The logo included a quote from the preface of the 1879 book Euclid and his Modern Rivals by Lewis ...
A few days later, the logo was used in China and Hong Kong to pay respects to the victims of the 2010 Qinghai earthquake. [22] On September 7, 2010, a colorless Google logo going by the name of the "Keystroke Logo" was introduced, which lit up with the standard Google colors as the first 6 letters of a search query were entered. [23]
A digital watermark is called robust with respect to transformations if the embedded information may be detected reliably from the marked signal, even if degraded by any number of transformations.
A logo (abbreviation of logotype; [1] from Ancient Greek λόγος (lógos) 'word, speech' and τύπος (túpos) 'mark, imprint') is a graphic mark, emblem, or symbol used to aid and promote public identification and recognition. It may be of an abstract or figurative design or include the text of the name that it represents, as in a wordmark.