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Existing JPEG files can be compressed a bit more, with no additional loss in quality, using jpegtran -optimize. This results in a smaller file, but the compression is slower. Jpegtran is part of libjpeg. A package called littleutils contains a script called opt-jpg that automates JPEG optimization, using jpegtran as the underlying engine.
The important part of this is the thumb parameter: [[File:Westminstpalace.jpg|thumb|upright=0.4|left|alt=A large clock tower and other buildings line a great river.|The Palace of Westminster]] (as shown in the left). For details of these options, see previous sections. Examples of the location parameter are below:
To do so, you would add the following code to the article: [[File:IMAGENAMEHERE.jpg|thumb|right|CAPTIONTEXTGOESHERE]] First is the file name. Second is the word "thumb" which indicates that the image is a thumbnail; which allows for appropriate resizing and bordering (without this code, the image gets placed full resolution, which is bad for ...
To make your uploaded file appear in an article, you need to insert it: edit the article and add the syntax [[File:Image name|thumb|Caption]] where you want the file to appear. Important: Image names are case-sensitive. For example, if an image is called Picture.jpg then neither picture.jpg nor Picture.JPG will find it.
Files from Wikimedia Commons use the same syntax described below, there is no extra step needed. The maximum size of an uploaded file is 100 megabytes. The following file types may be uploaded: png, gif, jpg/jpeg, xcf, pdf, mid, ogg/ogv/oga, svg, djvu and webm. note: pdf and djvu are intended primarily for projects like Wikisource.
Data in a RAW-file is structured according to the Bayer filter's pattern in cameras that use a single image sensor. Debayering, the process of obtaining bitmap data from a RAW-image is always a lossy operation. [citation needed] In addition, some downsampling is always performed, again reducing image information.
The capitalization in the wikicode must be followed; thus if an image file is Image:Photo of Wikipede.JPG, you will need to use the capital letters for "JPG". The image is blacklisted on MediaWiki:Bad image list .
To upload a non-free image, use the File Upload Wizard, which will help you add all of the required information. A link to the wizard can be found under "Tools" at the left of the screen. A link to the wizard can be found under "Tools" at the left of the screen.
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