ppmfade



Ppmfade User Manual(0)                                  Ppmfade User Manual(0)




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|-bentley|-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

       -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 transi-
              tion.


       -shift The pixels in the first image will be shifted further  and  fur-
              ther  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 finally  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.



netpbm documentation             April 1, 2000          Ppmfade User Manual(0)

Man(1) output converted with man2html