Phineas and Ferb Wiki:Image policy

Preferred formats, in order of preference: Need to test if JPEG can produce high-quality images at small resolutions, and what benefit can be had by running an optimizer on it.
 * 1) JPEG - most pictures since quality will be good and file size smaller than PNG (resulting in less loading time)
 * 2) PNG - icons and images that will be displayed at a small size
 * GIF

JPEG
 * 10% compression
 * When using an optimizer, choose low compression/high quality

Aspect ratios, in order of preference: Panoramic versions of pictures are welcomed
 * 1) Widescreen (16:9)
 * 2) SD (4:3) for "buttons" & userboxes
 * 3) multiples of 100x100 for avatars (150x150, 200x200, etc.), but no larger than 400x400

Bugs (channel logos):
 * Whenever possible, an image with the channel logo should be replaced by a version without it.
 * If the only way to achieve this is to drop resolution, check the bug to see if it's obnoxious. (The Disney XD bug is more noticable than the Disney Channel bug, so DisChan bugs are preferred over DisXD.)

File names:
 * see TSG#20 for details on how file names should be constructed
 * also in that issue is a note about checking to see if your picture has already been uploaded.

When uploading:
 * Summary describes what the picture is about
 * Summary includes links to any character listed
 * Summary includes which episode it is from (which provides a more obvious reinforcement to the "Images from (episode)" category that will be added.
 * Add the appropriate license and categories
 * When uploading multiple files, include info about adding categories inline since you get a short summary line to work with on each file you're uploading.

Displaying in articles:
 * No larger than 300px since many browsers still use 800x600 displays.
 * Optimum is 180px-200px.

Deletion For free image hosting, try ImageShack, PhotoBucket, or a similar provider.
 * If an image violates the conditions listed in the Block Policy
 * Off-topic files that are not placed on the uploader's user page within 7 days.

Hotlinking
 * Don't hotlink since it causes bandwidth theft. Upload the picture to this wiki.

From Wookieepedia:
 * 1) Use JPEG format for photographic images and game screenshots over 256 colors.
 * 2) MediaWiki software and/or images.wikia.com hates large progressive JPEGs and will not display them properly. The reason for this bug has yet to be found and the definition of "large" has yet to be determined, so just use standard encoding unless you're prepared to wrestle with the server when the image doesn't display right.
 * 3) Don't use lossless JPEG format. The server can't tell the difference when uploading, can't make it into thumbnails, and no browser supports it properly.
 * 4) Use PNG format for icons, logos, drawings, maps, flags, program window screenshots, and other images with relatively few colors, but sharp color transitions. SVG may be used, provided the image is provably redrawn from an official source.
 * 5) Use GIF format ONLY for inline animations (keeping in mind that animations are generally not encouraged on Wookieepedia).
 * 6) Use Ogg Vorbis for audio. Do not simply rename MP3 or WAV files to OGG, as this will cause your audio file to be deleted and you may be blocked for uploading content with a false description.
 * 7) Do not use Windows BMP format images; they are uncompressed and take up too much space, plus the Wiki software will not display them properly.
 * 8) If you upload a JPEG or PNG graphic that was downloaded verbatim from the Web or underwent minimal modifications (like cropping), please do not resave them in another format; if you edited them, save them in the same format you acquired them in. In particular, resaving JPEG images as PNGs is completely pointless, as it does not remove compression artifacts and merely increases image size.
 * 9) If the only modification you make to a JPEG is cropping, please use JPEGCrop or a similar lossless JPEG manipulation program.

Technical notes:
 * 1) Please do not use GIFs. Images with 256 colors or less should be saved as PNG files. Animated images are the only ones that should ever be in GIF format, but using animations here is actively discouraged.
 * 2) You absolutely, positively, cannot upload a file larger than 10 megabytes. This limit is set by Wikia staff and cannot be changed by Wookieepedia administration. This limit has changed at various times, originally being at least 8, then being changed to 5 for the majority of Wookieepedia's operational life. It could be changed again at any time. To save future image editing headaches, you may want to keep files under 5 megabytes anyway.

Replacement

Replacing can take place when the original file is of low resolution/quality. In this case, the original picture must be replaced by the exact same version (with better quality).