I want to use a picture of a famous painting from the 1950s. I realise that using someone else's picture would infringe copyright (usually). However, I can go to the public art gallery and take my own photograph of this painting, using this photograph in my hub.
However, suppose this painting was used on the front cover of a book I own? Can I take a photograph of this book and then use this photo in my hub without infringing anyone's rights? My book, my photo, what's the problem?
If the painting is protected by copyright, taking a picture of it for the book cover constitutes a copyright violation. The book cover contains an infringing image, and the photo of the book cover further reproduces that image, constituting a further infringing reproduction.
It is unlikely that anyone would bother taking legal action over such a photo. However, that doesn't resolve the issue with the infringing first photo and book cover. Making a book cover with infringing photos isn't very professional.