man > ppmfade(1)

Ppmfade User Manual(1)                 General Commands Manual                Ppmfade User Manual(1)

NAME
       ppmfade - generate a transition between two image files using special effects


SYNOPSIS
       ppmfade   [-f   first.ppm]   [-l  last.ppm]  [-mix|-spread|-shift|  -relief|-oil|-edge|-bent‐
       ley|-block] [-base name]


DESCRIPTION
       This program is part of Netpbm(1).

       ppmfadegenerates a transition between either two input images or between one input image  and
       black.   You can use the 30 intermediate images generated to show a smooth transition between
       segments of a movie.  The input and output images are in the PPM format.  If you specify both
       input images, they should both be the same size.  If you want to fade from black to an image,
       specify only the last image.  If you want to fade from an image to black,  specify  only  the
       first  image.   ppmfade names the resulting image files base.nnnn.ppm, where nnnn is a number
       varying between 0001 and 0030 and base is what you specify with via the -base option (default
       fade).

       Another way to convert by steps from one image to another is morphing.  You can use xmorph to
       do that.


OPTIONS
       In addition to the options common to all programs based on libnetpbm  (most  notably  -quiet,
       see  Common Options ), ppmfade recognizes the following command line options:



       -f first.ppm
              This is the image file (PPM format) to be used at the beginning of the transition.  If
              you don't specify this, the fade will start from black.


       -l last.ppm
              This  is  the  image file (PPM format) to be used at the ending of the transition.  If
              you don't specify this, the fade will end with black.


       -mix   The two images are superimposed with the brightness of the first image decreasing from
              full to none and the brightness of the final image increasing from none to full.   The
              transition  is  quadratic  in  brightness  with faster transition in the beginning and
              slower at the end.


       -spread
              The pixels in the first image will be moved (spread) further and  further  from  their
              original location and then moved into the proper location in the final image.  This is
              the default transition.


       -shift The  pixels  in  the first image will be shifted further and further horizontally from
              their original location and then moved into the proper location in the final image.


       -relief
              The first image is faded to a Laplacian relief filtered version of  the  first  image.
              This  is then faded to a Laplacian relief filtered version of the second image and fi‐
              nally faded to the final image.


       -oil   The first image is faded to an "oil transfer" version of the  first  image.   This  is
              then  faded  to an "oil transfer" version of the second image and finally faded to the
              final image.


       -edge  The first image is faded to an edge detected version of the first image.  This is then
              faded to an edge detected version of the second image and finally faded to  the  final
              image.


       -bentley
               The  first  image is faded to a "Bentley Effect" version of the first image.  This is
              then faded to a "Bentley Effect" version of the second image and finally faded to  the
              final image.


       -block The first image is defocused to small blocks.  The small blocks are converted to match
              a  defocused  version  of the last image.  The block version of the last image is then
              focused to the final image.


       -base name
              This forms part of the output filenames, as described above.




EXAMPLES
       ppmfade -f teapot.ppm -l pyr.ppm

       Fade from teapot.ppm to pyr.ppm generating fade.0001.ppm to fade.0030.ppm using the  "spread"
       transition.

       ppmfade -l teapot.ppm

       Fade from black to teapot.ppm generating fade.0001.ppm to fade.0030.ppm.

       ppmfade -f teapot.ppm -base end

       Fade from teapot.ppm to black generating end.0001.ppm to end.0030.ppm.


SEE ALSO
       tontsc manual, sgifade manual, smart_vfr manual, xmorph manual, ppm(1)


AUTHOR
       Bryan Henderson, Olympia WA; April 2000

       Inspired  by  and  intended  as a replacement for pbmfade (not a Netpbm program) by Wesley C.
       Barris.

DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from  HTML  source.   The  master
       documentation is at

              http://netpbm.sourceforge.net/doc/ppmfade.html

netpbm documentation                        01 April 2000                     Ppmfade User Manual(1)