Penguin
Recent Changes
Annotated edit history of ppmshift(1) version 1, including all changes. View license author blame.
Rev Author # Line
1 perry 1 ppmshift
2 !!!ppmshift
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 EXAMPLE
7 SEE ALSO
8 AUTHOR
9 ----
10 !!NAME
11
12
13 ppmshift - shift lines of a portable pixmap left or right by a random amount
14 !!SYNOPSIS
15
16
17 ppmshift ''shift'' [[''ppmfile'']
18 !!DESCRIPTION
19
20
21 Reads a portable pixmap as input. Shifts every row of image
22 data to the left or right by a certain amount. The 'shift'
23 parameter determines by how many pixels a row is to be
24 shifted at most.
25
26
27 Another one of those effects I intended to use for MPEG
28 tests. Unfortunately, this program will not help me here -
29 it creates too random patterns to be used for animations.
30 Still, it might give interesting results on still
31 images.
32 !!EXAMPLE
33
34
35 Check this out: Save your favourite model's picture from
36 something like alt.binaries.pictures.supermodels (ok, or
37 from any other picture source), convert it to ppm, and
38 process it e.g. like this, assuming the picture is 800x600
39 pixels: # take the upper half, and leave it like it is
40 pnmcut 0 0 800 300 cs.ppm
41
42
43 # take the lower half, flip it upside down, dim it and
44 distort it a little pnmcut 0 300 800 300 cs.ppm | pnmflip
45 -tb | ppmdim 0.7 | ppmshift 10
46
47
48 # and concatenate the two pieces pnmcat -tb upper.ppm
49 lower.ppm
50 !!SEE ALSO
51
52
53 ppm(5), pnmcut(1), pnmflip(1), ppmdim(1),
54 pnmcat(1)
55 !!AUTHOR
56
57
58 Copyright (C) 1993 by Frank Neumann
59 ----
This page is a man page (or other imported legacy content). We are unable to automatically determine the license status of this page.