thumbnail - create a TIFF file with thumbnail images
SYNOPSIS
thumbnail [ options ] input.tif output.tif
DESCRIPTION
thumbnail is a program written to show how one might use
the SubIFD tag (#330) to store thumbnail images. thumb
nail copies a TIFF Class F facsimile file to the output
file and for each image an 8-bit greyscale thumbnail
sketch. The output file contains the thumbnail image with
the associated full-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 fil
tering the input image with 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 curve that simply
maps the pixel value ranges. Alternative curves
are: exp50 for a 50% exponential curve, exp60 for a
60% exponential curve, exp70 for a 70% exponential
curve, exp80 for a 80% exponential curve, exp90 for
a 90% exponential curve, exp for a pure exponential
curve, linear for 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)
Man(1) output converted with
man2html