This article reminded me of a sore subject from back in about 1986 that continues today: https://wordpress.com/read/blogs/7890212/posts/4888 You should probably take a look at it before you continue.

Back when my colleague and I were roommates in the dorms at Cal Poly in San Luis Obispo, we noticed how badly the photographs in bare root catalogs had been modified to enhance color. Years before modern digital editing, colored film was cut out to any desired shape and placed over a photograph to produce a new photograph with enhanced color. We looked at pictures of flowering crabapples with canopies that were entirely bright pink, including the stems, leaves and everything associated with the canopy of the tree. We could easily see the outline of the bright pink film that had been placed over the original photograph. It was done with blue fescue, hydrangeas, azaleas, callas and really just about anything that…