For many product pages on my site, we are using one image to represent different styles because certain manufacturers only release one product shot and not a different shot for each style. Just recently my programmer updated all image file names to be the same as the product page title, which means there is now one image for every single page, even though the image may be exactly the same. Is this a potential duplicate content issue? He says no because the only way to determine they are duplicates would be to compare the binary data, and Google is looking at the content on the page, alt tag and image filename. Should we just stick to having one image reading from multiple product pages? Or is it okay to have a unique file name on the same image for multiple product pages even though the image may be identical? Any help is appreciated.