2008
Interface
Histogram
To view the histogram, click the Preview button. The histogram displays a
detailed bar graph of the distribution of brightness throughout the image.
The horizontal axis of the histogram defines the luminance value, and the
vertical axis indicates the percentage of the image covered by pixels of that
brightness. Histogram features are:
■ The histogram supports several display modes, which you can choose by
right-clicking the histogram display window. The menu lets you choose
between linear and logarithmic display, automatic or manual x-axis scaling,
y-axis scale options, and which channel is graphed: luminance, red, green,
or blue. The menu entries X-Axis Scale and Y-Axis Scale are simply labels,
and are thus unavailable for choosing.
7148 | Chapter 21 Managing Scenes and Projects