Pentax Optios7 - Manual (Page 54)

52
Tak
ing Pi
cture
s
4
A histogram is a graph showing the
brightness of an image on the
horizontal axis and the number of
pixels on the vertical axis (distribution
chart of the brightness). The histogram
will help you detect the brightness of
the image you have taken. For
instance, the graph peak tends to
appear on the left side for a darker
image, and the graph peak tends to
appear on the right side for a brighter
image. In general, when the exposure meter setting for your image is
well-balanced, the graph peaks tend to appear in the middle. On the
contrary, when the exposure meter gets imbalanced tending dark and
bright without showing a neutral brightness, the peaks appear not in the
middle but on both sides.
Using Histogram
N
umb
er o
f pi
xe
ls
Brightness
(Dark) (Bright)
Dark Neutral Bright