Command-line parameter error about "input_folder" and "-remove_black_background"

[JihnGlyn]

Thanks for providing your excellent work!

Well, I have some questions about the bash commands in scripts folder
As we can see in the every last two lines of the code:
echo warping -input_folder $output_dir ...
$warping -input_folder $output_dir ...

The program error message says:
Command-line parameter error: unknown option -input_folder
Command-line parameter error: unknown option -remove_black_background

Can anyone help me with this? :D