QU already has extensive error handling so these would have to be handled on a case by case basis.  This is not a common complaint so I would need example(s) of where you are seeing problems and I'd like to know more about what you are doing that is causing these errors.  Are you doing strange things with filters such as trying to modify them in a text editor?  It might be easier to correct the problem rather than have Qimage try to bandaid them after the fact, otherwise it's kinda garbage in, garbage out.

Also, with many file formats and EXIF headers, the header itself is essentially computer code.  So there is no way to have 100% failsafe error correction when you run into something like a bad header that creates infinite loops in its own header code, etc. since there are an infinite variety of ways to corrupt an image header.

Regards,
Mike