Ricoh Caplio R2 - Manual (Page 30)

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Histogram Display
When histogram display is on, a histogram
appears in the lower right corner on the LCD
monitor screen.
A histogram is a graph indicating the number
of pixels on the vertical axis and the
brightness on the horizontal axis. The
brightness is shadow (dark), halftone, and
highlight (light) from the left.
By using the histogram, you can judge the brightness of an image without
being affected by the brightness around the LCD monitor. This also helps
preventing voids and solids.
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
condition (flashing is required, the surrounding light is dark, and so on), 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.
• The histogram having peaks in the center part does not necessarily provide the best result
to suit your particular requirements.
For example, an adjustment is required if you want to intentionally achieve under or over
exposure.
Reference
For details about exposure correction, see P.76.