This is a text-only version of the following page on https://raymii.org:
---
Title       :   Imagemagick thumbnailer
Author      :   Remy van Elst
Date        :   29-11-2007
URL         :   https://raymii.org/s/snippets/Imagemagick-thumbnailer.html
Format      :   Markdown/HTML
---



Below you'll find the script that makes nice thumbnails from a bunch of images.
I've used it on the links page on this website. (Which is not around anymore).
First I made screenshots of the website's I wanted, with the firefox add-on
screengrab. It also works with pictures, but then you'll have to change the png
to jpg in the script. The script also makes a HTML page with a 2 collumn table
witth the thumbs in it.

<p class="ad"> <b>Recently I removed all Google Ads from this site due to their invasive tracking, as well as Google Analytics. Please, if you found this content useful, consider a small donation using any of the options below:</b><br><br> <a href="https://leafnode.nl">I'm developing an open source monitoring app called  Leaf Node Monitoring, for windows, linux & android. Go check it out!</a><br><br> <a href="https://github.com/sponsors/RaymiiOrg/">Consider sponsoring me on Github. It means the world to me if you show your appreciation and you'll help pay the server costs.</a><br><br> <a href="https://www.digitalocean.com/?refcode=7435ae6b8212">You can also sponsor me by getting a Digital Ocean VPS. With this referral link you'll get $100 credit for 60 days. </a><br><br> </p>


Make sure you have imagemagick installed:



   sudo apt-get install imagemagick


or



   sudo pacman -S imagemagick


The script:



   #####################################
   ## Raymii.org Thumbr script        ##
   ## Version 0.2. Just bugfixes...   ##
   #####################################

   #!/bin/bash
   NUMMR=1

   EXTENSION="jpg";
   mkdir work
   mkdir -p finished/pics

   GALL=./finished/gallery.html
   rm -rf $GALL
   echo "Made with raymii.orgs gallery thumber" > $GALL
   tabhead=" <table border="0" bordercolor="0" >"
   tabfeet=" </table >"
   echo $tabhead >> $GALL


   for i in *.$EXTENSION;
   do cp -rf -v "$i" "./work/$NUMMR.$EXTENSION";

   convert ./work/$NUMMR.$EXTENSION -auto-orient
    -thumbnail 160x160 -unsharp 0x.5 ./work/$NUMMR.w1.png


   convert ./work/$NUMMR.w1.png
    -bordercolor white -border 6
    -bordercolor grey60 -border 1
    -bordercolor none -background none
    ( -clone 0 -rotate `convert null: -format '%[fx:rand()*30-15]' info:` )
    ( -clone 0 -rotate `convert null: -format '%[fx:rand()*30-15]' info:` )
    ( -clone 0 -rotate `convert null: -format '%[fx:rand()*30-15]' info:` )
    ( -clone 0 -rotate `convert null: -format '%[fx:rand()*30-15]' info:` )
    -delete 0 -border 100x100 -gravity center
    -crop 200x200+0+0 +repage -flatten -trim +repage
    -background black ( +clone -shadow 60x4+4+4 ) +swap
    -background none -flatten
    "./work/$NUMMR.thumb.png"

   cp ./work/$NUMMR.thumb.png ./finished/pics/$NUMMR.png

   evenline=" <tr > <td > <a href=""><img src="pics/$NUMMR.png" alt=" pic $NUMMR - made by raymii.org script" / > </a></td >"
   oddline=" <td > <a href=""><img src="pics/$NUMMR.png" alt=" pic $NUMMR - made by raymii.org script" / > </td > </a></tr >"

    slot=$(( $NUMMR % 2 ))
   if [ $slot -eq 0 ]
   then
    echo $oddline >> $GALL
   else
    echo $evenline >> $GALL
   fi
   let "NUMMR += 1"
   done

   echo $tabfeet >> $GALL
   rm -rf ./work
   exit 0


The thumbing effect was copied from the example pages from imagemagick.

  [1]: https://www.digitalocean.com/?refcode=7435ae6b8212

---

License:
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This means you can use it in any way you want, you can copy it, change it
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   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.

Just to be clear, the information on this website is for meant for educational
purposes and you use it at your own risk. I do not take responsibility if you
screw something up. Use common sense, do not 'rm -rf /' as root for example.
If you have any questions then do not hesitate to contact me.

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