Patent ID: 8564725

Claim:
A video data processing apparatus comprising: a contrast correction calculating section correcting the contrast of input luminance data by performing a calculation using a contrast correction value; an error diffusion section performing an error diffusion process on the luminance data whose contrast has been corrected; an error diffusion setting section setting whether to perform the error diffusion process at the error diffusion section or not; a correction value setting section detecting a black peak value and a white peak value of an input luminance signal and setting the contrast correction value using the detected black peak value and white peak value; and a correction amount adjusting section adjusting the contrast correction value set by the correction value setting section depending on (i) whether the error diffusion process is performed at the error diffusion section or not according to an instruction from the error diffusion setting section and (ii) according to a contrast correction amount selected by a user from among a plurality of amounts including an amount indicating no contrast correction is to be performed, such that contrast correction obtained by the contrast correction calculating section when the error diffusion process is not performed is less than that obtained when the error diffusion process is performed in all situations in which the amount selected by the user is any amount except the no amount, and supplying the adjusted contrast correction value to the contrast correction calculating section.