Man Pages

thumbnail(1) - phpMan thumbnail(1) - phpMan

Command: man perldoc info search(apropos)  

THUMBNAIL(1)                                                      THUMBNAIL(1)

       thumbnail - create a TIFF file with thumbnail images

       thumbnail [ options ] input.tif output.tif

       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  thumb-
       nail  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.

       -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.

       There are no options to control the format of the saved thumbnail images.

       tiffdump(1), tiffgt(1), tiffinfo(1), libtiff(3)

       Libtiff library home page:

libtiff                        November 2, 2005                   THUMBNAIL(1)