Page 22 - luminar 2018 - user manual pc v 2_3.pages

Histogram
While color correcting or adjusting exposure, the histogram can be a great help. A histogram is a
graphical representation of the tonal values of your image. This graph illustrates how the pixels in
the image are distributed across brightness levels. In other words, it shows the amount of tones of
particular brightness found in your photograph ranging from black (0% brightness) to white (100%
brightness). Ideally, well balanced images will have tonal values across the entire range of the
histogram.

To read a histogram, start at the left edge, which shows the shadow regions. The middle shows the
midtones (where most adjustments to an image are made), and to the right are the highlights.

The histogram is able to display Red, Green, Blue channels separately or, by default, shows all of
them at once. Click on the Histogram to switch between seeing a composite Histogram or just
viewing details about the Red, Green, and Blue channels (which can be useful for spotting tint
issues and color casts). You can also see a grayscale average for luminance.

Additionally, clicking the two small triangles in the upper left and upper right corners will show hot
and cold pixels respectively. These are pixels that have shifted or exposed to become absolutely
black or white pixels.

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