It is a simple script to create a pdf from a tree of images. An outline will be produced, according to the tree, with :

• for a folder : the name of the folder
• for a file : the first found of : ImageDescription Exif tag, JPEG comment, filename (without extension)

In a folder, the files are alphabetically sorted and folders are processed first. For items provided on the command line, no sort is applied, you must sort yourself according your wish.