Pario TechnoBlob » imagemagick

Create a photo collage using imagemagick

Hans-Henry Jakobsen — Mon, 14 Apr 2008 16:40:42 +0000

I use imagemagick to create index images to my photo albums to get a quick overview without looking through all the pictures.

This is how I create a simple photo collage using imagemagicks montage command

montage -label '%t\n%wx%h' -resize 150x150 '*.JPG' -geometry +3+3 -tile 3x -frame 5 _Index.JPG

Extracting images from Adobe Acrobat PDF file

Hans-Henry Jakobsen — Fri, 01 Feb 2008 22:38:16 +0000

This is a short example of how to extract images from a PDF file using ImageMagick

# convert thePDFfile.pdf page-%03d.png
# ls page*
page-000.png  page-001.png  page-002.png

Imagemagick can also be used to create Adobe Acrobat PDF documents

convert DSC* resultFile.pdf

The resultfile contains one image per page.

Resize and watermark images using Imagemagick

Hans-Henry Jakobsen — Sun, 30 Dec 2007 16:33:31 +0000

This is a modified version of my Resize of images in a folder with imagemagick post back in February. Only difference this time is that i strips out EXIF tags and the script has been cleaned up a bit. Click on the image to see the result in full size.

#!/bin/bash

# Description:
# Script to resize JPG images to desired width defined in IMAGESIZE variable.
# EXIF tags is also removed from the result images.
# Software needed:
# jhead - http://www.sentex.net/~mwandel/jhead/
# imagemagick - http://www.imagemagick.org

IMAGESIZE="320 480"
for IMAGEFILE in $(ls|grep JPG)
do
        for I in $IMAGESIZE
        do
                # create directories if needed
                if [ ! -d $I ]
                then
                        mkdir $I
                fi

                # Strip EXIF tag information from source file
                jhead -purejpg $IMAGEFILE

                # Resize file
                base=`basename $IMAGEFILE .JPG`_Resized_$I.JPG
                convert $IMAGEFILE -resize $I $base

                # Watermark the file
                width=`identify -format %w $base`
                convert -background '#0008' -fill white -gravity center -size ${width}x15 \
                -font Verdana -pointsize 10 \
                caption:"Copyright © 2007 Pario.no" \
                +size $base +swap -gravity south -composite $I/$base;

                # delete resized file
                rm $base
        done

        # Delete source file (DO NOT USE YOUR ORIGINAL FILE!)
        rm $IMAGEFILE
done

You can download my resize, watermark bash script here.

Great collection of advanced Imagemagick scripts

Hans-Henry Jakobsen — Sun, 25 Nov 2007 11:29:34 +0000

Today I stumbled upon Fred’s Imagemagick Scripts, a nice collection of bash scripts to do image manipulations like

3D rotate
change/enhance brightness
Superimposes a set of horizontal and/or vertical grid lines on an image
etc…

Create a photo montage using imagemagick

Hans-Henry Jakobsen — Sun, 25 Nov 2007 01:29:26 +0000

This is a little bash script I put together to create a photo montage with 5 resized pitures in max 3 rows using imagemagick. The script is run from within the folder I have filled with the JPG images I want to create a montage from.

#!/bin/bash
for image in `ls *.JPG`
  do
    convert -resize 50x50! $image small-$image
  done
montage small-*.JPG -mode Concatenate -tile 5x3 montage_final.jpg

The result file like the one below is saved with the filename montage_final.jpg.
One disadvantage using this technique is that it doesn’t keep the aspect ratio of the pictures.
You find more examples of montage usage by visiting the ImageMagick v6 Examples — Montage, Arrays of Images page.