I have several JPG files from a PDF file, so concatenating the JPG files need to be "under each other". How can I do this?
geometry -> you need to know the original picture width, or at least give this a good value so the quality could be enough
tile -> how many "columns x rows" will the output have? (from the original jpg files) - $ROWS could be calculated with "ls -1 *.jpg | wc -l" if one folder contains all the jpg files.
*.jpg -> input jpg files
output.jpg -y the output jpg