Fred's ImageMagick Scripts



    Licensing:

    Copyright © Fred Weinhaus

    My scripts are available free of charge for non-commercial (non-profit) use, ONLY.

    For use of my scripts in commercial (for-profit) environments or non-free applications, please contact me (Fred Weinhaus) for licensing arrangements. My email address is fmw at alink dot net.

    If you: 1) redistribute, 2) incorporate any of these scripts into other free applications or 3) reprogram them in another scripting language, then you must contact me for permission, especially if the result might be used in a commercial or for-profit environment.

    Usage, whether stated or not in the script, is restricted to the above licensing arrangements. It is also subject, in a subordinate manner, to the ImageMagick license, which can be found at: http://www.imagemagick.org/script/license.php

    Please read the Pointers For Use on my home page to properly install and customize my scripts.

MIRRORIZE


Creates a mirror effect in an image.

Download Script

last modified: December 15, 2018



USAGE: mirrorize [-r region] infile outfile
USAGE: mirrorize [-h or -help]

-r ..... region ...... region of image to be mirrored;
...................... half image values: North, South, East, West;
...................... image quadrant values: NorthWest, NorthEast,
...................... SouthWest, SouthEast; Default=West

PURPOSE: To create a mirror effect in an image.

DESCRIPTION: MIRRORIZE creates a mirror effect in an image by mirroring any half-image to create the other half or by mirroring any image quadrant to create the other quadrants.

ARGUMENTS:

-r region ... REGION is the region to be mirrored. This can be any half image specified as North, South, East or West. It can also be any image quadrant specified as NorthWest, NorthEast, SouthWest or SouthEast. The default is West.

NOTE: if the image has any odd dimension, then after the mirrorizing, the output image will be one pixel smaller in that dimension.

CAVEAT: No guarantee that this script will work on all platforms, nor that trapping of inconsistent parameters is complete and foolproof. Use At Your Own Risk.


EXAMPLES


Image Mirrorize
http://www.cescg.org/CESCG97/boros/

Original

Arguments:
-r West

Arguments:
-r East

Arguments:
-r North

Arguments:
-r South

Arguments:
-r NorthWest

Arguments:
-r NorthEast

Arguments:
-r SouthWest

Arguments:
-r SouthEast



What the script does is as follows:

  • Takes one half or one quadrant of an image
  • Flips, Flops, Rotates 180 as needed
  • Appends the sections together

This is equivalent to the following IM commands for mirrorize of the West half of the image.

  • ww=`convert $infile -format "%w" info:`
  • hh=`convert $infile -format "%h" info:`
  • ww2=`convert $infile -format "%[fx:floor(w/2)]" info:`
  • hh2=`convert $infile -format "%[fx:floor(h/2)]" info:`
  • convert $infile[${ww2}x${hh}+0+0] \( +clone -flop \) +append $outfile