ImageMagick Thumbnails and Contact Sheets
Update (2010-06-14)
Thanks to Glenn Turnbull I’ve fixed a bug where the last contact sheet would not be created when the number of photos is evenly divisible by the contact sheet size.
Additionally, this script and others will now be kept updated at http://github.com/jmhobbs/helper-scripts
Update (2012-04-10)
Phillip Vuchetich wrote a neat script for making composite 4×6 out of wallet sized images, which he has allowed me to post about here.
Wow, long time no post. Darcy and I got a digital camera about a week ago, a Nikon D90. We haven’t really had a chance to put it through it’s paces, but we’ve taken a few pictures around the house to play with it.
At about 3mb each (JPEG’s) the images are really slow to preview in Konqueror. I decided it would be better to be able to download all the photos from the card, then run a script to make my thumbnails. That way I wouldn’t have to wait around while I was viewing photos, instead I could just wait once at the beginning of the process.
My resulting script may have some holes, but it works well for me on Sidux. It takes all of the images in the current directory and makes 600×600 base thumbnails into a directory called “thumb” then uses those to make 12 image contact sheets into a directory called “contact”.
| real | user | sys | |
|---|---|---|---|
| resize | 0m43.478s | 0m40.625s | 0m2.525s |
| scale | 0m25.449s | 0m22.975s | 0m2.236s |
| sample | 0m18.362s | 0m15.983s | 0m2.211s |
| Script times for 16 JPEG images at 3Mb each To 600×600 thumbnails and 200×200 contact sheet frames. |
|||
Your results will vary, but I ran it with three different scaling types (resize, scale, sample). I’m fine with the output from the fastest one (sample) but you can do as you please. I didn’t add command line options because I wanted to have consistent sizes and qualities every time I use it.
 Side By Side Resize Method Comparison Click For Fullsize |
 Sample Contact Sheet Click For Full Size |
It keeps you updated so you know it hasn’t stalled, here is a sample run.
[email protected]:~/Desktop/D90/dcim/example$ digiCamProc.sh
Processing 16 Images
Creating Thumbnails
100%
Creating Contact Sheets
1 of 2
2 of 2
[email protected]:~/Desktop/D90/dcim/example$
And here it is. Feel free to comment your changes!
#!/bin/bash
# Digital camera thumbnail/contact sheet tool.
# http://www.velvetcache.org/2009/03/30/imagemagick-thumbnails-and-contact-sheets
# http://github.com/jmhobbs/helper-scripts
#
# Copyright (c) 2009-2010 John Hobbs
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
# CHANGELOG
# 2010-06-14 - Fixed contact sheet problem, thanks to Glenn Turnbull. (John Hobbs)
# 2009-03-30 - Created script. (John Hobbs)
### SETTINGS ###
# Scaling Methods:
# resize (Best/Slow)
# scale (Middle/Middle)
# sample (Worst/Fast)
METHOD="sample"
# Thumbnail Size
THUMBSIZE="600x600"
# Thumbnail Directory
THUMBDIR="thumb"
# Thumbnail Quality
THUMBQUALITY="80"
# Contact Item Size
CONTACTSIZE="200x200"
# Contact Sheet Max Width
CONTACTWIDTH="3"
# Contact Sheet Max Height
CONTACTHEIGHT="4"
# Horizontal Spacing
CONTACTSPACINGH="3"
# Vertical Spacing
CONTACTSPACINGV="3"
# Contact Sheet Directory
CONTACTDIR="contact"
# Contact Sheet Quality
CONTACTQUALITY="100"
################
CONTACTCOUNT=$(($CONTACTWIDTH * $CONTACTHEIGHT))
PIX=$(ls -l *.jpg | wc -l)
echo "Processing $PIX Images"
echo
echo "Creating Thumbnails"
mkdir -p $THUMBDIR
CTR=0
echo -n "0%"
for i in *.jpg; do
echo -ne "\r"
echo -n "$((100 * $CTR / $PIX))%"
convert -strip -quality ${THUMBQUALITY} -${METHOD} ${THUMBSIZE} "$i" "${THUMBDIR}/${i}"
CTR=$(($CTR + 1))
done
echo -ne "\r"
echo "100%"
echo
echo "Creating Contact Sheets"
mkdir -p $CONTACTDIR
CTR=0
PAGES=$(($PIX / $CONTACTCOUNT))
if [ $(($PIX % $CONTACTCOUNT)) -ne 0 ]; then
PAGES=$(($PAGES + 1))
fi
PAGE=1
LIST=""
for i in ${THUMBDIR}/*.jpg; do
if [ $(($CTR % $CONTACTCOUNT)) -eq 0 ] && [ $CTR -ne 0 ]; then
echo "$PAGE of $PAGES"
montage -label %f -quality $CONTACTQUALITY -frame 5 -tile ${CONTACTWIDTH}x${CONTACTHEIGHT} -geometry ${CONTACTSIZE}+${CONTACTSPACINGH}+${CONTACTSPACINGV} $LIST jpg:- > ${CONTACTDIR}/${PAGE}.jpg
LIST=""
PAGE=$(($PAGE + 1))
fi
LIST="$LIST $i"
CTR=$(($CTR + 1))
done
if [ "" != "$LIST" ]; then
echo "$PAGE of $PAGES"
montage -label %f -quality $CONTACTQUALITY -frame 5 -tile ${CONTACTWIDTH}x${CONTACTHEIGHT} -geometry ${CONTACTSIZE}+${CONTACTSPACINGH}+${CONTACTSPACINGV} $LIST jpg:- > ${CONTACTDIR}/${PAGE}.jpg
fi
