Canon PowerShot S3 IS Advanced User's Manual page 21

Histogram
The histogram is a graph that allows you to judge the brightness of
an image, and you can display it in the
to confirm the brightness while shooting. The greater the bias
toward the left in the graph, the darker the image. The greater the
bias toward the right, the brighter the image. If the image is too
dark, adjust the exposure compensation to a positive value.
Similarly, adjust the exposure compensation to a negative value if
the image is too bright (p. 75).
Sample Histograms
Dark Image
In addition to adjusting the exposure compensation, you can
also decrease the shutter speed and aperture value to create
a brighter image. Similarly, you can increase the shutter
speed and aperture value to create a darker image.
Night Display
When shooting in dark conditions, the camera automatically
brightens the LCD monitor or viewfinder to suit the brightness of the
*
subject , making it easier to frame the subject.
* Noise will appear and the movements of the subject will appear irregular in
the LCD monitor. The recorded image, however, will not be affected. The
brightness of the image displayed in the monitor and the brightness of the
actual image recorded will differ. (This function cannot be disabled.)
Balanced Image
, , , and
Bright Image
modes
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