Why do you need the "background crap" on a scan for a CV?
Well my fifty cents: Just reduce the quality as longa as the significant information remains displayed, means all data, a seal and so on. I am sure this will be sufficient for the initial screening of any application. I am sure if a company is interested they will invite someone regardless if the antifraud features of a license or passport are visible on a scan or copy or not.
Any company wants to see your original license anyway during the interview process.