How can I search for photos by height or width?

you can use simple shell script for this. create any file search.sh in your photos folder using

gedit search.sh

and paste bellow lines:

#!/bin/bash

mkdir  /home/$USER/test
for i in *.jpg; do
read -r w h <<<$(identify -format "%w %h" "$i")
if [ `expr $h / $w` ==  `expr 4 / 3` ]; then
cp "$i" /home/$USER/test/
fi
done

save this file using Ctrl+s and make it executable using

sudo chmod +x search.sh

then execute it using command

./search.sh

it will copy all photos that have 4:3 to test directory in your home directory. if you want copy to flash drive or somewhere else then make change in script and if identify command is not available in your system then you can install is using command:

sudo apt-get install imagemagick

Extracting images from a recursive directory

The script below will copy images of a 4:3 ratio, from a source directory recursively into a target directory. The script reads all common image formats, non- image files are ignored (raising in IOError)

#!/usr/bin/env python3
import os
import shutil
from PIL import Image
import sys

dr = sys.argv[1]; target = sys.argv[2]

for root, dirs, files in os.walk(dr):
    for f in files:
        try:
            file = root+"/"+f
            img = Image.open(file); size = img.size; ratio = size[0]/size[1]
            if ratio == 4/3:
                shutil.copyfile(file, target+"/"+f)
        except (IOError, ValueError):
            pass

How to use

• Copy the script into an empty file, save it as search_ratio.py

• Run it by the command:

  python3 /path/to/search_ratio.py /source/directory /target/directory
  

If one or more directories include spaces, use quotes.
An example command I used for testing:

python3 '/home/jacob/Bureaublad/pscript_4.py' '/home/jacob/Bureaublad' '/home/jacob/Afbeeldingen/test'

In case you are extracting images from a "flat" (single) directory

Then the script can be a little simpler:

#!/usr/bin/env python3
import os
import shutil
from PIL import Image
import sys

dr = sys.argv[1]; target = sys.argv[2]

for f in os.listdir(dr):
    try:
        file = dr+"/"+f
        img = Image.open(file); size = img.size; ratio = size[0]/size[1]
        if ratio == 4/3:
            shutil.copyfile(file, target+"/"+f)
    except (IOError, ValueError):
        pass

Use it exactly like the first one.

Note that with the first script, you will get name clashes in case of duplicated names in different source folders.