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Интерактивная система просмотра системных руководств (man-ов)

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    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 pix-
         els  high.   Pixels are calculated by sampling and filtering
         the input image with each pixel value passed through a  con-
         trast 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)
    
    
    
    


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