Patent ID: 8340418

Claim:
An image processing apparatus comprising a control unit configured to function as: a histogram generator configured to generate a histogram of an input video signal; a gain calculator configured to calculate a peak luminance gain of the input video signal based on the histogram; a dynamic range extending module configured to extend a dynamic range of a preset first characteristic between tone and brightness in accordance with the peak luminance gain to output an extended first characteristic; a function generator configured to generate a tone conversion function based on the extended first characteristic, a second characteristic between tone and brightness of a display panel for displaying the input video signal, and the histogram, wherein the function generator is configured to calculate a difference between a gradient of the extended first characteristic and a gradient of the second characteristic and to multiply the difference by a value relating to the histogram in order to generate the tone conversion function; and a tone converter configured to convert a tone of the input video signal based on the tone conversion function.