Do you know and/or have you looked into the benefits of posting digitally signed images?
I just had to read up on that again to see if I could.
My images have been scraped tens of thousands of times in Google however Bing mostly recognises them as mine. What I decided a couple of years ago was to build a new flagship site using all new watermarked images and much more informational text, so far I've done 550+ pages with another 1,500 to go and, seemingly, no one's attempted to scrape me...yet!
All the first uploaded informational pages and images are ranking extremely well and new ones are rising steadily and I expect within a year that this site will actually outrank all my other widget sites.
I do have about another 20,000 product images to upload however I want to see just how much business these generate before committing any further time.