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

This program is part of Netpbm.

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.

-f first.ppm

-l last.ppm

-mix The two images are superimposed with the brightness of the


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


-oil The first image is faded to an 'oil transfer' version of the

-edge The first image is faded to an edge detected version of the


-block The first image is defocused to small blocks. The small blocks

-base name

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

ppmfade -f teapot.ppm -base end

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

tontsc manual, sgifade manual, smart_vfr manual, xmorph manual, ppm

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)