So I have thousands of wallpapers scattered around my harddrive. Is there any way to scan for images with certain dimensions, ie your screen resolution?

try the script below.
See the comments in the script for usage and dependencies.
tested on slackware 13.1

#!/bin/bash
#Script By Francisco Dalla Rosa Soares - 2010/06/21
#
#USAGE: teste.sh <directory to search> <what to search>
#
#EXAMPLE: teste.sh /home/myuser *.jpg
#
#The script will return the path to the files that meet the image dimensions specified.
#
#Image dimensions are in the array WALLPAPERSIZE.
#You can add or remove sizes as you want.
#This script DEPENDS on exiv2 for checking image dimensions

WALLPAPERSIZE=( 800x600 1024x768 1200x600 1680x1050 1920x1200 1280x800 1600x1200 1280x1024 )
for i in $(find $1 -iname $2); do
FILENAME=`exiv2 $i 2>/dev/null | grep "name" | awk -F: '{print $2}'`;
IMAGESIZE=`exiv2 $i 2>/dev/null | grep "Image size" | awk -F: '{print $2}'| sed 's/ //g'`;
for j in ${WALLPAPERSIZE[@]}; do
if [ $j == $IMAGESIZE ]
then
echo $FILENAME;
fi
done
done

1 members found this post helpful.

Awesome, that's exactly what I was looking for!