ditherstiff(1)

NAME
     ditherstiff - dither (halftone) an 8 bit stream TIFF file using error
     diffusion dither

SYNOPSIS
     ditherstiff  [-I filename] [-O filename] [-L filename]
     [-e] [-s] [-h] [-D]

DESCRIPTION
     ditherstiff dithers the images contained in a stream TIFF (STIFF) file
     using a modified Floyd and Steinberg error diffusion dithering algorithm.
     The input images should have 8 bits per color component.  The output
     images will be dithered to 1 bit per color component.

     ditherstiff supports the following colorspace models:  k, w, cmy, cmyk,
     ymc, ymck, kcmy and rgb. Planar and chunky raster formats are supported.
     The colorspace and raster format remained unchanged in the output stream.

   Command Line Options
     ditherstiff supports the following command line options:

     -I filename
               Specifies the name of the file from which the STIFF input will
               be read.  If the -I option is not specified, input will be read
               from the standard input.

     -O filename
               Specifies the name of the file to which the STIFF output will
               be sent.  If the -O option is not specified, output will be
               sent to the standard output.

     -L filename
               Specifies the name of the file to which error, warning and
               informational messages are to be written. If the file specified
               already exists, any messages generated by ditherstiff will be
               appended to the end of the file.  If the -L option is not
               specified, message output will be sent to standard error.

     -e        Use a classic Floyd and Steinberg dither (error diffusion).

     -s        Use a modified Floyd and Steinberg error diffusion dither (a
               two weight error filter with random perturbations is used to
               reduce visual artifacts).  This is the default.

     -h        Prints a program usage message to the standard error.

     -D        Specifies verbose output for debugging purposes.

NOTES
     ditherstiff is typically used as a filter between psrip and a printer
     driver to provide error diffusion dithered images for the printer.
     ditherstiff output can be viewed using vstiff.

SEE ALSO
     vstiff(1), libstiff(3), psrip(1).