The column of Trajan features the type of art known as
narrative relief.
This means that it is a relief that tells a certain story. A relief is a sculpture, usually, which sculpted parts are attached to a solid background, and they are raised above it. Trajan's column is located in Italy, and tells the story of the Roman emperor Trajan's victory in the Dacian wars.
Color grading is the process used to change the visual tone of an image, many photographer's use this. Hope it helps!