IMAGE DISPLAY DEVICE AND/OR METHOD THEREFOR

摘要

An object is to improve the visibility of the dark portion and to prevent the degradation of image quality caused by excessive correction. A reflectance calculation unit 27 is storing a parameter RGain for adjusting the amplitude of a reflectance component R. An illumination light correction unit 25 generates a corrected illumination light component L1 from an illumination light component L and a formula L1 = (log(LAmp*L+1))/(log(LAmp+1)). An image resynthesis unit 29 obtains a corrected illumination light component L' from L' = LGain*L1 + (1-LGain)*L. The image resynthesis unit 29 also calculates a corrected image Iout from the corrected illumination light component L' and the corrected reflectance R', as well as from a formula Iout = exp(logL' + RGain(logI-logL)). The value of the corrected illumination light component (L') is determined based on the ratio (LGain) at which the output value of the correction function (L1) and the original illumination light component (L) are combined. Thus, it is possible to obtain a natural image while maintaining contrast to some extent.