Everything you never knew you wanted to know about the Mercury Project
RixWiki:Image use policy
From RixWiki
For multimedia in general (images, sound files, etc.) see RixWiki:Multimedia. See RixWiki:Uploading images about information on uploading or just go directly to Special:Upload.
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Rules of thumb
Here's a quick checklist of rules for use of images. After the list, a more detailed discussion explains the reasoning behind them.
- Keep copyrights in mind when uploading images.
- Use the image description page to describe an image and its copyright situation.
- Please tag your image with one of the image copyright tags.
- Use a clear, detailed title. Note that if any image with the same title has already been uploaded, it will be replaced with your new one.
- Upload a high-resolution version of your image whenever possible, and use the automatic thumbnailing option of the Wikipedia image markup to scale down the image. Wiki accepts photos up to 2 MB in size. Do not scale down the image yourself, as scaled-down images may be of limited use in the future. Preferably use thumbnails less than 35 kilobytes in size (70 kB at most).
- Edit the images to show just the relevant subject.
- Don't put photo credits in articles or on the images themselves; put them on the description page.
- Use JPEG format for photographic images, and PNG format for icons, drawings, maps, flags, and such. Use GIF format for animations. Do not use Windows BMP format images; they are uncompressed and take up too much space.
- Add a good alternative text for images.
- Think carefully if offensive pictures are really necessary. Consider providing a link to the picture, and a warning of the picture's contents, rather than place it directly in the article. If you have concerns regarding the appropriateness of an image, discuss it on the relevant article talk page.
Copyright (images)
Please note: the following is not the official copyright policy - it is merely a reminder and also gives some additional tips.
When you upload an image, make sure you own the image, or that it is in the public domain, or that the copyright holder has agreed to license it under the GFDL. Always note the image's copyright status on the image description page, using one of the image copyright tags, and giving additional information about the origin of the image. If you created the image, don't just write image created by me, do write image created by John Doe on Jan 1st, 2000 (where you of course replace John Doe with your name, and Jan 1st, 2000 with the date of the image creation).
Under United States copyright law, all images that were published before January 1, 1923 in the United States are now in the public domain, but this does not apply to images that were created prior to 1923 and published in 1923 or later. The year 1923 has special significance and this date will not roll forward before 2019. This is particularly significant because RixWiki pages are currently hosted on a server in the United States. However, the interaction of RixWiki the GFDL, and international law is still under discussion.
You can find a large selection of places to acquire public domain photos at the public domain image resources.
However, if you strongly suspect that an image is a copyright infringement (for example, if there is no information on copyright status on its image description page and you have seen it elsewhere under a copyright notice), then you should list it for deletion (see below).
Fair use considerations
The w:fair use doctrine used in America (but not in many other jurisdictions) is frequently abused. Try to limit your use of this tag to album covers, book covers, DVD/video covers, movie posters, and corporate logos. If you have questions about whether an image is fair use, ask at RixWiki:Fair use.
The critical thing to remember -- our use of such images relies on a portion of the doctrine that says we can use a low-resolution public-but-copyrighted image (like an album cover, book cover, or movie poster) for the purpose of illustrating an article. A high-resolution image, suitable for purposes other than illustration/education (such as, say, printing bootleg CD covers), would not be considered fair use and would quickly be put up on RixWiki:Images for deletion.
Due to the much narrower scope of RixWiki compared to Wikipedia, the fair use should be rarely, if at all, invoked. See also:
Editing images
To replace an image with an edited version, use the Upload file page, and make sure that your file has the same name as the one that you want to replace.
Converting an image to another file format changes the filename, hence the new image will have an entirely separate image description page.
Deleting images
- Drop a line to the person who uploaded the image, telling them of your concerns. You may be able to resolve the issue at this point.
- Remove all uses of the image from articles - make it an orphan
- Add one of these notices to the image description page
- copyvios: add the copyright infringement notice for images from RixWiki:Copyright problems to the image description page:
- otherwise: add the deletion notice {{ifd}} to the image description page.
- List the image on one of these links:
- copyright violations: list the image on RixWiki:Copyright problems
- otherwise: list the image on RixWiki:Images for deletion
- The image can then be deleted after a week in the normal way - see our deletion policy.
To actually delete an image after following the above procedure, you must be an administrator. To do so, go to the image description page and click the (del) link. Do not click the Delete this page link, as this will delete the image description page but leave the image intact. To delete the image talk page (if any), you can use the Delete this page link as usual. Deleted images cannot be undeleted. Therefore they are gone permanently unless someone happened to keep a backup.
Image titles
Descriptive titles are useful. In general the title should include an indication of the source of the image. It is a convention in RixWiki to start the titles of images which come from NASA with the characters "NASA.". For NASA images which are numbered BY NASA, the image number should complete the title, e.g. Image:NASA.61-MR4-76.jpg . This will help avoid uploading unnecessary duplicates.
In many cases, the indication of the source would be an inclusion of the contributor's initials. In the past the recommendation was to put the initials at the beginning of the title, e.g. RJD.IPDiagram.png. However, a bug has shown up in the latest version of the mediawiki software which prevents uploading images whose titles have less than four (4) characters before the first period. The preferred practice now is to put the intials just before the filetype, so if the above image were to be uploaded in the future it should be IPDiagram.RJD.png. There is no plan to rename existing images to meet this standard however.
Note: the example titles used below are more applicable to Wikipedia than RixWiki, however the same considerations of avoiding collision with existing and new images applies.
A map of Africa could be called "Africa.png", but quite likely more maps of Africa will be useful in RixWiki so it is good to be more specific, e.g. "Africa political map.yourinitials.png". Check whether there are already maps of Africa in Wikipedia. Then decide whether your map should replace one (in each article that uses it) or be additional. In the first case give it exactly the same name, otherwise a suitable other name. Avoid special characters in filenames or excessively long filenames, though, as that might make it difficult for some users to download the files onto their machines. Note that names are case sensitive, Africa.PNG is considered different from Africa.png. For uniformity, lower case file name extensions are recommended.
You may use the same name in the case of a different image that replaces the old one, and also if you make an improved version of the same image - perhaps a scanned image that you scanned again with a better quality scanner, or you used a better way of reducing the original in scale - then upload it with the same title as the old one. This allows people to easily compare the two images, and avoids the need to delete images or change articles. However, this is not possible if the format is changed, since then at least the extension part of the name has to be changed.
Currently there is no easy way to rename an image. Every skin except Nostalgia has either a “move” tab, or a “Move” or “Move this page” hyperlink. Clicking on one of these links will take you to a Move page, which doesn’t work. When you try to rename the image file, all you get is the following error message - “Error: could not submit form”. Therefore, the correct method to rename an image is to upload the image again, with the correct file name, and leave a request for speedy deletion on the first (incorrect file name) image. One template you might use for that is {{deletebecause|your reason here}}. Before you place the speedy deletion notice, make sure that all the articles that linked to the old image now link to the new image. A list of articles linking to an image is found at the end of the image's page.
Placement
See RixWiki:Image markup for recommendations on the best markup to use. For ideas and examples of how to place images, see RixWiki:Picture tutorial.
Format
- Drawings, icons, political maps, flags and other such images (basically those with large, simple, and continuous blocks of color) should be in PNG format.
- Photos and photo-like maps should be in JPEG format.
- Animations should be in animated GIF format.
In general, if you have a good image that is in the wrong format, convert it to the correct format before uploading. However, if you find a map, flag, etc in JPEG format, only convert it to PNG if this reduces the file size without causing artifacts. For further advice on converting JPEG to PNG, see RixWiki:How to reduce colors for saving a JPEG as PNG.
Most of the maps on the CIA World Factbook website were coded as JPEG, but are now coded as GIF. To update these photos, download the GIF picture from the CIA factbook, recode it in PNG format, and upload it to RixWiki
Try to avoid cropping or otherwise editing JPEGs too frequently--each edit creates more loss of quality. If you can find an original of a photograph in 16-bit or 24-bit PNG or TIFF, edit that, and save as JPEG before you upload.
Avoid images that mix photographic and iconic content. Though CSS makes it easy to use a PNG overlay on top of a JPEG image, the mediawiki software does not allow such a technique. Thus, both parts must be in the same file, and either the quality of one part will suffer, or the file size will be unnecessarily large.
When uploading SVG images, upload both the SVG source and a raster version, and cross-link on the image description page. Direct SVG support is planned (see meta:SVG image support) but not yet implemented. SVG uploads have currently been disabled by the developers.
See also: RixWiki:How to keep image file sizes as small as possible
Size
Uploaded image size
The MediaWiki software that RixWiki uses, can resize images automatically. It is not necessary, in most cases, to resize images yourself. We want RixWiki content to be reused as widely as possible, including as a source for printed media. Therefore, you should generally upload photographic images at a high resolution and use the mediawiki image markup to resize it.
The only restriction is that uploaded files must be smaller than 2 megabytes.
For line art, particularly that which you've drawn yourself, it may be better to manually resize the images to the right size and use them in the article. This is because the automatic resizing function can sometimes produce images that are larger in bytes than the original and/or of worse quality than the original.
In the future, Mediawiki image markup may be extended to better support "manual thumbnailing"; for now, if you want to upload a large version of a manually-scaled image do so and link to the larger version in the original's image description page.
Displayed image size
In articles, if you wish to have a photo beside the text, you should generally use the "thumbnail" option available in the "Image markup", or approximately 200-250 pixels of width if you're doing it manually. Larger images should generally be a maximum of 550 pixels wide, so that they can comfortably be displayed on 800x600 monitors.
Image queuing
Articles may get ugly and difficult to read if there are too many images crammed onto a page with relatively little text. They may even overlap.
For this reason, it is often a good idea to temporarily remove the least-important image from an article and queue it up on the article's talk page. Once there is enough text to support the image, any contributor is free to shift the image back into the article.
If a contributor believes such a queued image to be essential to the article, despite the lack of text, he or she may decide to put it back in. However, he or she should not simply revert the article to its previous state, but make an attempt to re-size the images or create some sort of gallery section in order to deal with the original problem.
It is a good idea to use the <gallery> tag for queued images.
It is important that queued images not be lost when archiving of talk pages takes place.
Revision history of articles containing images
Old versions of articles do not show corresponding old versions of images, but the latest ones, unless the file names of the images have changed.
Recommended software
These software packages have been recommended by wikipedians for use in image manipulation:
- The GIMP [1] (free, Open source - for Linux, Windows, Mac OS X)
- ImageMagick [2] (free, Open source - for Linux, Windows, Mac OS 9 or X, and others)
- PMView [3] (Commercial software - for Windows, OS/2)
- GraphicConverter [4] (Shareware - for Mac OS 8, 9 or X)
- IrfanView [5] (Freeware - for Windows) A multi-featured freeware tool, supports many image formats
- XNView [6] A multi-featured freeware tool, supports many image formats
- Adobe Photoshop [7] A very popular photo and image manipulation program.
- Ulead PhotoImpact [8] A photo and image editor
- Adobe Illustrator [9] A very popular imaging program, used especially for creating vector-based graphics.
- Macromedia Fireworks [10] A mildly popular imaging program, primarily used for creating animated gifs and static JPGs. Contains only basic editing tools.
