PhotoRealistic™ Style(Side note: those are silly trademark claims for generic terms.)
Our artists evaluate your image then balance and enhance the color, then adjust the sharpness and contrast levels accordingly. We repair minor imperfections and optimize for canvas. Choose this style when you want to maintain the integrity of the original, when the photo has a group of people and the faces will be small or for landscapes with fine detail that you wish to maintain.
We follow the same process as photorealistic, then, using a specialized tablet and stylus create brushstrokes by hand to give a beautiful painterly effect. Choose this when reproducing portrait style photo where the subject’s faces are prominent or anytime you wanted the look of a traditional oil painting.
There are interesting questions about whether Canvas on Demand produces copyrightable derivative works in either case. Both with photorealism and brushstroke effects, there are decisions to be made--the site positions them as artistic decisions--but there is also an attempt to achieve a certain result, and even if the process requires time and skill, that doesn't necessarily translate into copyrightability. I don't think the questions are very different as between photorealism and brushstrokes. There may be a greater concern with the photorealistic versions for interfering with others' ability to create their own photorealistic versions of the originals, but both are medium translations, and both processes might be used to create either copyrightable derivative works or uncopyrightable reproductions, depending on the specifics.