MediaWiki:Apihelp-query+stashimageinfo-param-prop/en

Which image information to get:
 * timestamp:Adds timestamp for the uploaded version.
 * canonicaltitle:Adds the canonical title of the image file.
 * url:Gives URL to the image and the description page.
 * size:Adds the size of the image in bytes and the height, width and page count (if applicable).
 * dimensions:Alias for size.
 * sha1:Adds SHA-1 hash for the image.
 * mime:Adds MIME type of the image.
 * thumbmime:Adds MIME type of the image thumbnail (requires url and param $1urlwidth).
 * metadata:Lists Exif metadata for the version of the image.
 * commonmetadata:Lists file format generic metadata for the version of the image.
 * extmetadata:Lists formatted metadata combined from multiple sources. Results are HTML formatted.
 * bitdepth:Adds the bit depth of the version.