GPU Pro 6

402 V Mobile Devices

Reinhard’s global TMO. The tonal range of an image describes the number of

tones between the lightest and darkest part of the image. Reinhard et al. im-

plemented one of the most widely used global TMOs for HDRI, which computes

the tonal range for the output image [Reinhard et al. 02]. This tonal range is

computed based on the logarithmic luminance values in the original images.

The algorithm first computes the average logarithmic luminance of the entire

image. This average, along with another parameter, is then used to scale the

original luminances. Then, to further allow for more global contrast in the image,

this approach lets ...