Local multi-scale tone mapping operator

摘要

Techniques for applying the multi-scale local tone mapping the image of relatively high dynamic range is provided. To generate a high resolution gray scale ratio image having a luminance value ratio, ratio global operator may be applied to a luminance value obtained input from High Dynamic Range (HDR) image. Local multiscale ratio grayscale image with weighted coupling ratio grayscale image two different may be generated at least. Each of the image gray scale ratio of two different, may have a spatial resolution different levels at least. To generate a gray-scale image tone mapped, ratio values ​​in a local multi-scale gray scale ratio image can be used in conjunction with the luminance value obtained from the input HDR image.