User Commands                                        thumbnail(1)



NAME
     thumbnail - create a TIF file with thumbnail images

SYNOPSIS
     thumbnail [options] input.tif output.tif

DESCRIPTION
     The thumbnail command shows how to use the SubIFD tag (#330)
     to  store  thumbnail images. thumbnail copies a TIF Class F
     facsimile file to the output file and, for  each  image,  an
     8-bit  grayscale  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
     The following options are supported:

     -c              Specify a contrast curve to apply when  gen-
                     erating  the  thumbnail  images. By default,
                     pixel values are  passed  through  a  linear
                     contrast  curve  that  simply maps the pixel
                     value ranges. Alternative curves are as fol-
                     lows:


                     exp50                   50%      exponential
                                             curve




                     exp60                   60%      exponential
                                             curve



                     exp70                   70%      exponential
                                             curve



                     exp80                   80%      exponential
                                             curve







SunOS 5.11          Last change: 26 Mar 2004                    1






User Commands                                        thumbnail(1)



                     exp90                   90%      exponential
                                             curve



                     exp                     pure     exponential
                                             curve



                     linear                  linear curve



     -h              Specify the height of  thumbnail  images  in
                     pixels.



     -w              Specify the width  of  thumbnail  images  in
                     pixels.



OPERANDS
     The following operands are supported:

     input.tif       The name of the input TIF file.



     output.tif      The name of the output file.



ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Availability                 SUNWTiff                    
    
     Interface stability          Uncommitted                 
    


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





SunOS 5.11          Last change: 26 Mar 2004                    2






User Commands                                        thumbnail(1)



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

     Updated by Breda McColgan, Sun Microsystems Inc., 2004.


















































SunOS 5.11          Last change: 26 Mar 2004                    3