In the theory of photography, tone reproduction is the mapping of scene luminance and color to print reflectance or display luminance,[1] with the aim of subjectively "properly" reproducing brightness and "brightness differences."[2]
The reproduction of color scenes in black-and-white tones is one of the long-time concerns of photographers.[3]
A tone reproduction curve is often referred to by its initials, TRC, and the 'R' is sometimes said to stand for response, as in tone response curve.