NAME

       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.
       thumbnail  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 filtering 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)

       Libtiff library home page: http://www.remotesensing.org/libtiff/

libtiff                                         November 2, 2005                                    THUMBNAIL(1)