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vipsthumbnail
Langue: en
Version: 372520 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
vipsthumbnail - make thumbnails of image filesSYNOPSIS
vipsthumbnail [flags] imagefile1 imagefile2 ...DESCRIPTION
vipsthumbnail(1) processes each imagefile in turn, shrinking each image to fit within a 128 by 128 pixel square. The shrunk image is written to a new file named tn_imagefile.jpg. This program is typically quite a bit faster and uses much less memory than other image thumbnail programs.For example:
$ vipsthumbnail fred.png jim.tif
will read image files fred.png and jim.tif and write thumbnails to the files tn_fred.jpg and tn_jim.jpg.
$ vipsthumbnail --size=64 -o thumbnails/%s.png fred.jpg
will read image file fred.jpg and write a 64 x 64 pixel thumbnail to the file thumbnails/fred.png.
OPTIONS
- -s N, --size=N
- Set the output thumbnail size to N x N pixels. The image is shrunk so that it just fits within this area, Images which are smaller than this are expanded.
- -o FORMAT, --output=FORMAT
- Set the output format string. The input filename has any file type suffix removed, then that value is substitued into FORMAT replacing %s. The default value is tn_%s.jpg meaning JPEG output, with tn_ prepended. You can add format options too, for example tn_%s.jpg:20 will write JPEG images with Q set to 20.
- -d N, --disc=N
- Set disc use threshold to N. Images which cannot be opened directly need to be decompressed first. Images which are smaller than N are decompressed to memory, images which are larger are decompressed to temporary files. Use the TMPDIR environment variable to change the location for temporary files.
- -p I, --interpolator=I
- Resample with interpolator I. Use vips --list classes to see a list of valid interpolators. The default is bilinear.
- -n, --nosharpen
- By default, vipsthumbnail(1) will sharpen thumbnails slightly to make them look more pleasing. This option disables this sharpening.
- -e PROFILE, --eprofile=PROFILE
- Export thumbnails with this ICC profile. Images are only colour-transformed if there is both an output and an input profile available. The input profile can either be embedded in the input image or supplied with the --iprofile option.
- -i PROFILE, --iprofile=PROFILE
- Import images with this ICC profile, if no profile is embdedded in the image. Images are only colour-transformed if there is both an output and an input profile available. The output profile should be supplied with the --oprofile option.
- -l, --nodelete
- Don't delete the profile from the output image. Since all output images will generally have the same profile, vipsthumbnail(1) will usually delete it. This option leaves the profile inside the image.
- -v, --verbose
- vipsthumbnail(1) normally runs silently, except for warning and error messages. This option makes it print a list of the operations it performs on each image.
RETURN VALUE
returns 0 on success and non-zero on error.SEE ALSO
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