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HISTOGRAM
The histogram is a graph depicting the distribution of brightness
values in the image for each of the three color channels (Red, Green,
and Blue) (The histogram displayed in the Shooting Mode is the
distribution of tones in the image). The horizontal axis shows the
brightness level, with darker pixels towards the left side and brighter
pixels toward the right. The vertical axis shows the proportion of
pixels at each level of brightness.
By examining the histogram of the full image, you can gauge the overall
exposure of that image. You can also use the histogram to determine if
zoomed-in sections of an image are over or under exposed.
This histogram shows that the higher pixel
values are never used in the image,
indicating that the image is underexposed,
and therefore will appear dark. In general,
when the histogram is higher on the left side,
the image is mostly composed of dark pixels,
causing it to appear dark—either because
the image is underexposed or because it is
a dark scene such as night shot or sunset.
This histogram shows a fairly even
distribution of pixel values, indicating that
the image is well exposed, with good
contrast. However, the histogram
distribution of a well exposed image will vary
greatly depending on the subject.
This histogram shows that many of the pixel
values are at their brightness limit, indicating
that some areas of the image may be blown
out. In general, when the histogram runs off
the right side, the image will have many
white pixels—either because the image is
overexposed or because it is a bright scene
such as the beach or snow.
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General
Weight and Dimensions
