zoomstiff(1)

NAME
     zoomstiff - magnify or shrink a TIFF stream

SYNOPSIS
     zoomstiff [ -b | -g | -i | -m | -t | -q ] [ -w blur ] [ -s ] xsize ysize

DESCRIPTION
     zoomstiff magnifies or shrinks the images contained in a TIFF stream
     (STIFF), with or without filtering.  The filtering method is one pass,
     uses 2-d convolution, and is optimized by integer arithmetic and
     precomputation of filter coefficients.  By default, zoomstiff uses a
     triangle filter kernel (-b option, below).

     zoomstiff uses the same algorithms as izoom(6D), modified to operate on
     the various permutations of STIFF.

     xsize and ysize are the number of pixels desired in the horizontal and
     vertical directions respectively in the resized image, unless the -s
     option is present, in which case they are scale factors.

     zoomstiff reads from its standard input and writes the zoomed image data
     to its standard output.

   Command Line Options
     zoomstiff supports the following command line options:

     -b        Use a box as the filter kernel.

     -g        Use a Gaussian filter kernel.

     -i        Do impulse zooming.  This option disables the filtering that
               zoomstiff does by default.  This will result in much faster
               execution time, but undesirable effects in the image data.

     -m        Use a Mitchell kernel.

     -t        Use a triangle kernel.  This is the default.

     -q        Use a quadratic function as the filter kernel.

     -s        When this option is present, interpret xsize and ysize as
               scaling factors rather than sizes.

     -w blur   Specify the width of the reconstruction filter.  This will
               affect how blurry the resulting image is.  If you want more
               blur use a larger number.  The default value is 1.0.

SEE ALSO
     vstiff(1), libstiff(3), izoom(6D).