Help:Image page

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Each uploaded file has an associated image page. This term is also applied in the case of other file types, notably sound files, e.g. Image:Schubert- Impromptu B-flat1.ogg.

In the case of an image proper, the image page shows the full image (elsewhere often only a reduced version is shown), or, depending on preferences, a reduced version with a link to the full version, labelled "Download high resolution version (..x.., .. KB)".

Also the page is used as image description page, giving info about the image.

If a family of projects has a Commons project, typically the file is uploaded on Commons. The image page there gives copyright info. In the internal image syntax [[Image:filename]], [[:Image:filename]], or [[Media:filename]], the filename is assumed to refer to the one in the same project if it exists there, otherwise to one on Commons. When choosing a name for a file on Commons, do not use a name that is already in use on any project on which the file may be used, unless the new file should replace the local ones, which will therefore be deleted, or unless the image from Commons should be replaced locally with a local version without changing the links.

An image on Commons can have a separate image page on every project that does not have another image with the same name (which would block access to the image on Commons). If the projects are distinguished by language, then the local image page can contain info about the image in the local language. It also allows categorizing the image within the local category system, and shows the local pages that use the image.

To find out on which pages of which projects an image on Commons is used, it is important to link the image page on Commons to all local image pages of that image. Even if the local image page has never been created explicitly and has therefore an empty editable part, a link to the page produces a page with an "image links" section showing the local pages that use the image.

The interlanguage link feature works on Commons, and produces links to the Wikipedias. Links to other projects are shown in-page. E.g. commons:Image:Blank Go board.png.

The image is linked to the local image description page, which, due to the contents of MediaWiki:Sharedupload, is linked to the one on Commons, where the image was uploaded. See a few local contents of [[MediaWiki:Sharedupload]]: Meta-wiki, English, and Italian (Note that the link from the called contents to Commons cannot lead to a real image).

To make a link to the image description page of a sound file, or of an image without including the actual image, use a link like: [[:Image:a_sound.ogg]] or [[:Image:an_image.jpg]]. In the case of an image, the leading colon prevents the image being embedded in the article, and instead makes an ordinary link. In the case of a sound, automatically playing the sound is not possible anyway.

The description page consists of four parts:

  • in the case of an image: the image itself
  • description of the image/sound
  • "Image history", see page history
  • "Image links" or "File links" (the name is the content of the local MediaWiki:Imagelinks. See a few local contents of [[MediaWiki:Imagelinks]]: Meta-Wiki, English, and French): a list of pages that embed the image, if applicable, and of pages linking to the image/sound with "Media:"; however:
    • it does not list links to the image page
    • for an image in a template it lists only the template, not the pages in which the template occurs (for that see "What links here" of the template),
    • if an image in a template depends on a parameter with the whole image code or the url of the image, or depends on {{PAGENAME}} or {{PAGENAMEE}}, it does neither show the final page nor the template. If only the caption is a parameter, the template is listed.
    • it does not include the rare case of an uploaded html file linking to the image.

For an image on Commons, subsequently the following is shown on the local image page (see e.g. Image:Tst.png):

  • the image
  • the message in MediaWiki:Sharedupload
  • the local editable content
  • the rendering of the editable content on Commons, including content transcluded from other pages on Commons; sections are not numbered and not in the TOC; category tags are ignored; internal links within Commons are rendered in the style of internal links, but link to Commons; existence detection with regard to existence on Commons works; variables depending on the site refer to Commons.
  • the local pages that use the image

The description part has also an edit history; it is labelled, somewhat confusingly, Image:xxx Revision history. It should not be confused with the Image history.

What follows refers to the description part, and is in particular about images. For sound, see also w:Wikipedia:Media.

Useful things to include on an image description page

In the description part of the page you can put text. Initially the description part automatically contains the upload summary supplied by the user when uploading the first version (this text also shows up in the Image history section at the first upload line).

Description of the image

Eg: "Image of a goldfish in a small tank". This should not be an alternative text (see alternative text for images), but rather a description. This is useful for users who do not have direct access to the image, and is a temporary substitute for a proper longdesc tag.

You could also include the proportions of the image, in pixels.

Other versions

If other versions (especially a larger version) of the same image exists, link to them.

  • [[Media:Goldfish-in-tank2.jpg|different camera angle]] ([[:Image:Goldfish-in-tank2.jpg|info]])
  • [[Media:Goldfish-in-tank-textfree.jpg|textfree version]] ([[:Image:Goldfish-in-tank-textfree.jpg|info]])

Textfree versions are useful for using across language versions.

Categorizing images

Images can be in the same category as other pages, but are treated separately: on the category page they are not included in the count of articles in the category, and they are displayed in a separate section, with for each a thumbnail and the name, see category page.

On Commons there are essentially only images. On projects with real articles a category can either mix articles and images about a subject, or one has separate image categories. An image category is typically a subcategory of the general category about the same subject, and a subcategory of a wider image category.

For categorizing a new image, the image page does not even have to be edited: the category tag can simply be put in the upload summary.

Nonexisting image

Nonexisting images show no image history section, see e.g. Image:Stop sign us.JPG.

Editing

The preview of the edit page of an image page only shows the editable part, not the image itself, the image history or the image links.

Through this edit page one cannot edit the image file itself: a new image file requires a new upload.

Protection

Protection of an image page is automatically also protection of the image itself: i.e. a new image under the name of the existing image can only be uploaded by a sysop.

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