Canon PowerShot G10 - Manual (Page 54)

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The following information may also be displayed with some images.
A sound file in a format other than the WAVE format is attached or the
file format is not recognized.
JPEG image not conforming to Design rule for Camera File System
Standards (p. 279) .
AVI data type
Unrecognized data type
z Information for images shot on other cameras may not
display correctly.
z Overexposure Warning
In the following cases, overexposed portions of the image
blink.
- When reviewing an image right after shooting in the LCD
monitor (information view).
- When using the detailed display mode during playback.
Histogram Function
The histogram is a graph that allows you to check the brightness of
an image. You can also display the histogram in the ,
, and
modes to check 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. By using the
exposure compensation function, you can correct the image
brightness before shooting
(p. 137) .
Sample Histograms
Balanced Image Dark Image Bright Image
You can change the shutter speed, aperture value and ISO
speed to adjust the brightness of an image in the
mode.