DEVICE OR METHOD FOR DISPLAYING IMAGE

摘要

Improving the visibility of the dark portion and to prevent the degradation of image quality caused by excessive correction. A reflectance calculation unit is storing a parameter RGain for adjusting the amplitude of a reflectance component R. An illumination light correction unit 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 obtains a corrected illumination light component L′ from L′=LGain*L1+(1−LGain)*L. The image resynthesis unit 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(log L′+RGain(log I−log L)). 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.

主权项

1. An image display device for generating output image data by correcting an input image on the basis of Retinex theory, the image display device comprising:
separation means configured to separate an illumination light component from the input image using a filter; corrected illumination light component calculation means configured to calculate a corrected illumination light component by adjusting the separated illumination light component using an illumination light component adjustment parameter for adjusting brightness of the illumination light component; and generation means configured to generate the output image data on the basis of the corrected illumination light component.