image-type-file-name-regexps

image-type-file-name-regexps is a variable defined in `image.el'.
Its value is shown below.

Documentation:
Alist of (REGEXP . IMAGE-TYPE) pairs used to identify image files.
When the name of an image file match REGEXP, it is assumed to
be of image type IMAGE-TYPE.

Value:

(("\\.png\\'" . png)
 ("\\.gif\\'" . gif)
 ("\\.jpe?g\\'" . jpeg)
 ("\\.bmp\\'" . bmp)
 ("\\.xpm\\'" . xpm)
 ("\\.pbm\\'" . pbm)
 ("\\.xbm\\'" . xbm)
 ("\\.ps\\'" . postscript)
 ("\\.tiff?\\'" . tiff)
 ("\\.svgz?\\'" . svg)
 ("\\.\\(?:3fr\\|a\\(?:r[tw]\\|vs\\)\\|bmp[23]?\\|c\\(?:als?\\|myka?\\|r[2w]\\|u[rt]\\)\\|d\\(?:c[mrx]\\|ds\\|ng\\|px\\)\\|f\\(?:ax\\|its\\)\\|gif\\(?:87\\)?\\|hrz\\|ic\\(?:on\\|[bo]\\)\\|j\\(?:\\(?:pe\\|[np]\\)g\\)\\|k\\(?:25\\|dc\\)\\|m\\(?:iff\\|ng\\|rw\\|s\\(?:l\\|vg\\)\\|tv\\)\\|nef\\|o\\(?:rf\\|tb\\)\\|p\\(?:bm\\|c\\(?:ds\\|[dltx]\\)\\|db\\|ef\\|gm\\|i\\(?:ct\\|x\\)\\|jpeg\\|n\\(?:g\\(?:24\\|32\\|8\\)\\|[gm]\\)\\|pm\\|sd\\|tif\\|wp\\)\\|r\\(?:a[fs]\\|gb[ao]?\\|l[ae]\\)\\|s\\(?:c[rt]\\|fw\\|gi\\|r[2f]\\|un\\|vgz?\\)\\|t\\(?:ga\\|i\\(?:ff\\(?:64\\)?\\|le\\|m\\)\\|tf\\)\\|uyvy\\|v\\(?:da\\|i\\(?:car\\|d\\|ff\\)\\|st\\)\\|w\\(?:bmp\\|pg\\)\\|x\\(?:3f\\|bm\\|cf\\|pm\\|wd\\|[cv]\\)\\|y\\(?:cbcra?\\|uv\\)\\)\\'" . imagemagick))