extra script to create union between ground truth and prediction

[lrob]

When you encounter file not found error, it's usually because you have
mismatched numbers of ground-truth and predicted files.
You can use this script to create missing files as empty file. The rationale
behind is the following:

• if a file is missing from the ground truth but is present among the predictions it means that we have false positives
• if a file is missing from the predictions but is present in the ground truth it means that we have a false negative

[Cartucho]

Hello, this script is based on the following, right?

It would be easier if you applied the changes directly to that script.

[lrob]

Yes it is, but they are doing different things. one intersects the two sets of files and mine makes the union. I think it is better to keep them separated, are you of the same opinion?

[Cartucho]

Oh sorry, I only saw this now! So, by union you mean creating empty files when missing, right?

I think that is a great idea, better than deleting or moving files (what the intersection is doing right now)!

[lrob]

Yes, right. That's what I mean with union. If you think that it is better then the current solution probably it is the case to change also the comment written by the code when it detects that some prediction or gt files are missing. But I let you decide about this.

[Cartucho]

Yes, your solution is better, let's also change that comment.

Even better the code should do this automatically.
If the file is not found, it should show a warning and add the empty file automatically.