The peak of the triangle in Figure 3 (shown as a) can also
be programmed differently for the three regions. This is
required so that a higher emphasis on HE output can be
used in the dark region and progressively less HE output
will be used for the mid and bright regions. This was
found to be the best setting for digital video, as it
stretches the dark regions more while affecting the other
regions less. As explained previously, dark images are
more common and bringing out the details in these dark
regions is required more often. The method proposed
here is well suited for that while at the same time, the
dynamic contrast for images with more information in
the mid or bright regions is increased.