A bash script to check the dimensions of images recursively, using getopts and find.

img_checker.sh [OPTION...]

OPTIONS:
-d <dir_name>, specify the directory inside which the script will loop
-l <file_name>, the script will log the images that aren't correct into <file_name>
-m <min_dim>, the script will check if the dimension of the images are beyond the minimum <min_dim>
-M <max_dim>, the script will check if the dimension of the images are beyond the maximum <max_dim>
-s, the script will check if the images are squared (i.e. NxM with N == M)
-r, rename each file with the name of its parent folder, followed by its index inside the directory
  example: /Pokémon/Voltorb/cbahf4kasdm3.jpg -> /Pokémon/Voltorb/Voltorb1.jpg

Directory structure:

./Pokémon/
  |
  +-- Bulbasaur/
  |     |
  |     +-- img1.jpg, img2.png, [...]
  |
  +-- Charmander/
  |     |
  |     +-- img1.jpg, img2.png, [...]
  |
  +-- Squirtle/
  |     |
  |     +-- img1.jpg, img2.png, [...]
  |
[...]

Task 1: Find every non-square image in 'Pokémon/' subdirectories and log their path to 'log.txt'.

user@hostname: ~$ ./img_script -d Pokémon/ -s -l log.txt

'-d Pokémon/' tells the script we want to check all the images in Pokémon/ subdirectories
'-s' tells the script we want to check if the images are squared
'-l log.txt' tells the script to log the incorrect images to the file log.txt

Task 2: Find every image, in 'Pokémon/' subdirectories, which height or width is less than 250, and also rename them with the name of their parent folder.

user@hostname: ~$ ./img_script -d Pokémon/ -m 250 -r

'-d Pokémon/' tells the script we want to check all the images in Pokémon/ subdirectories
'-m 250' tells the script we want to check if the minimum of the dimension of the images is 250
'-r' tells the script we want to rename each image with its parent folder

ImageMagick package must be installed.

• Fix filename with spaces bug;
• Fix the rename bug which deletes some files if they're already named in the same way;
• Add extension check (specify a list of extensions, e.g. '.jpg, .png');