MAN page from CentOS 6 libtiff-3.9.4-10.el6_5.x86_64.rpm
THUMBNAIL
Section: User Commands (1)
Updated: November 2, 2005
Index NAME
thumbnail - create a
TIFFfile with thumbnail images
SYNOPSIS
thumbnail[
options]
input.tifoutput.tif DESCRIPTION
thumbnailis a program written to show how one might use theSubIFD tag (#330) to store thumbnail images.
thumbnailcopies a
TIFFClass F facsimile file to the output fileand for each image an 8-bit greyscale
thumbnail sketch.The output file contains the thumbnail image with the associatedfull-resolution page linked below with the SubIFD tag.
By default, thumbnail images are 216 pixels wide by 274 pixels high.Pixels are calculated by sampling and filtering the input imagewith each pixel value passed through a contrast curve.
OPTIONS
- -w
- Specify the width of thumbnail images in pixels.
- -h
- Specify the height of thumbnail images in pixels.
- -c
- Specify a contrast curve to apply in generating the thumbnail images.By default pixels values are passed through a linear contrast curvethat simply maps the pixel value ranges.Alternative curves are:exp50for a 50% exponential curve,exp60for a 60% exponential curve,exp70for a 70% exponential curve,exp80for a 80% exponential curve,exp90for a 90% exponential curve,expfor a pure exponential curve,linearfor a linear curve.
BUGS
There are no options to control the format of the saved thumbnail images.
SEE ALSO
tiffdump(1),
tiffgt(1),
tiffinfo(1),
libtiff(3)
Libtiff library home page:http://www.remotesensing.org/libtiff/
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- OPTIONS
- BUGS
- SEE ALSO
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