Ricoh CAPLIO R4 - Manual (Page 28)

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Histogram
When Histogram is on, a histogram appears
in the lower right corner on the LCD monitor.
A histogram is a graph indicating the number
of pixels on the vertical axis and the
brightness on the horizontal axis (from left to
right, shadows (dark areas), midtones, and
highlights (bright areas)).
By using the histogram, you can determine
the brightness of an image without being affected by the brightness around the
LCD monitor. This also helps you correct for areas that are overly bright or
dark.
If the histogram has only peaks on the right
side without anything else, this picture is
over-exposed with too many pixels only for
highlight sections.
If the histogram has only peaks on the left
side without anything else, this picture is
under-exposed with too many pixels only for
shadow sections.
Correct the exposure to an appropriate level.
Note
• The histogram displayed on the LCD monitor is for reference only. Depending on the
shooting conditions (use of the flash, dark surrounding light, etc.), the exposure level
indicated in the histogram may not correspond to the brightness of the shot image.
• Exposure compensation has its limitation. It does not necessarily achieve the best possible
result.
• A histogram with peaks in the center may not necessarily provide the best result to suit
your particular requirements.
For example, an adjustment is required if you want to underexpose or overexpose the
image.
Reference
For information on how to correct the exposure compensation, see P.80.