Visual plagiarism: A few things to think about

The photographer who shot the cover for Metro Business was fired for copying Style's cover.

Should the same reasoning apply to paintings inspired by Van Gogh's famous
"Sunflowers," which was itself inspired by Monet's flowers? Why or why not?

Credits: Style Weekly (Richmond, Va.) | Metro Business, Times-Dispatch (Richmond, Va.)
Claude Monet, "Sunflowers" 1881 | Vincent Van Gogh, "Sunflowers" 1888 |
Joe Anna Arnett, "Sunflowers over castle ruin" | Jae Dougall, "Protea, sunflowers with lemons"

Readings: "To our readers" | "Ethics case: We erred, and now we are taking action"