Traditional Culture Encyclopedia - Photography and portraiture - What determines the black, white and gray background of portrait photography?

What determines the black, white and gray background of portrait photography?

Take the characters as the main body.

People usually divide the tone of portrait photography into high-key, low-key and intermediate tone (gray tone). Then the middle tone is between high-key and low-key, with small contrast and rich levels. The image is composed of white to light gray and dark gray to black tone levels. The relationship between the characters and the background can reveal the inner world of the characters.