A display device including a processor configured to extract first through third feature information corresponding to a first image, each of a plurality of regions included in the first image, and object regions included in the first image, respectively. The processor is configured to obtain a first through third contrast ratio enhancement curves, corresponding to the first image, generated by applying the first feature information to a curve generation network in which first parameter information is set, corresponding to each of the plurality of regions, generated by applying the second feature information to the curve generation network in which second parameter information is set, corresponding to each of the plurality of object regions, generated by applying the third feature information to the curve generation network in which third parameter information is set, generate a second image by applying the first through third contrast ratio enhancement curves to the first image.