2008

Histogram This graph shows the image's luminance values in a logarithmic
scale. The red lines indicate the current Black Point and White Point values.
The graph is visible only for luminance levels with substantial representation
in the image. In other words, if a luminance level only applies to one or two
pixels in the image, there will be no corresponding graph line on the
histogram. Compare with Measured Min/Max, which gives the entire range
of luminance levels in the image.
In general, the resulting image will have the most dramatic effect when the
histogram is used to set the Black Point and White Point range values, rather
than using the full range expressed by Measured Min/Max.
7128 | Chapter 21 Managing Scenes and Projects