|Alan De Marche|
Value plays a number of roles within any given image. Values may 1. provide a sense of light as in the time of day, 2. create volume when gradations - transitions between light and dark- are applied. And 3. values can be used "subjectively" for dramatic effect or psychological impact. For instance, lighter (high key) values are more cheerful and uplifting whereas darker values (low key) can be more ominous or mysterious. When creating depth, we generally see dark values as receding and light values advancing.