If you take a photo of a photo, it might even be in background, then is it a copy. Is a scan a copy or is is another photo? Another way might be to use 'print screen' button on keyboard. This facility has been around since before I started in IT, and was a very useful tool till print spoolers and printing got better. It is in effect a photo of what is on the screen.
I suspect this is actually going to get more complicated with 3D scanning and 3D printing. Costs are going down, and quality is going up and it won't be long till someone can buy(or borrow) one wagon, scan, it, make the changes they want, and get it 3D printed, possibly even in colour. The world is changing very fast. I am not sure if some are ready for that, so before it gets even more complicated maybe the whole question of copyright, intellectual ownership needs to be looked at again. It is still based on ideas from 100 years ago but given how easy it is to create a photograph, and how cheap, then many of the original reasons are no longer valid.
Tim Berners-Lee is quoted as saying that he could have copyrighted/trade marked his ideas for creating the internet and worldwide web, but did not, because it would have not have let it develop the way it has. In IT , although some companies do try to protect their ideas, most people learn from others, share what they do, all for the benefit of everyone else. I am not sure what part I actually played, but I did do a few things which might have been picked up by others. Much of the software written for online is written for free, and those involved ant that. Without that attitude, we would not even be having this discussion online.
To counter the often used reasons that 'artists' have to make their money somehow, well what about all those creating computer code for free, and enabling the online world to get better. The recent case where one such programmer got fed up because some company wanting him to stop using a certain name in one of his programs, so when it all started to go sour, he decided to delete all the code he had written and many online sites started to have problems. It was not a complex piece of code, just 11 lines, but it showed how dependent we are on people who write code for everyone to use for free, no copyright etc.
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges.