Image conversion
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Image conversion in MediaWiki is handled by ImageMagick or GD. Image are converted for several reasons, the commons is when thumbnails are created.
Known problems
[edit]LAB color is not supported by ImageMagick at this moment.
How to
[edit]Convert files with different colorspaces / colormodels: Check the colorspace of the original file and load this and a RGB colormodel using the -profile option. (this requires .icc or .icm files)
Convert PSD to JPG: When converting a PSD to a JPG format always make use of the -flatten command in ImageMagick, this makes sure the layers are removed.
Convert EPS to JPG: When converting a EPS, you need to have w:Ghostscript installed.