Batch watermarking photos

Let's face it, watermarking is a necessary evil. Here's a fast way you can watermark an entire directory's worth of images with one command. To do this we will be using ImageMagick. Follow the instructions for installing and basic use to familiarise yourself with it. Windows users may want to take a look at this site for further information http://savage.net.au/ImageMagick/html/install-convert.html.

Move to the directory where your images are and enter/cut and paste the following

for file in *.jpg; do convert -background '#0008' -fill white -gravity center  -size 10000 "caption:(c) My Name"  "$file" +swap -gravity south -composite  "wm_$file"; done

This will create a watermark of every file with the extension .jpg (will need to change to uppercase if your pictures are suffixed with .JPG) with the text (c) My Name. The original file will remain as is and the watermarked file will have the same name but with a wm_ prefix. If for some reason the longest side of your photo is greater than 10,000 pixels change the -size 10000 to -size [number of pixels of longest side].

If you want to customise your text even further, take a look here.