Pentax Optio W10 User Manual (en)

Download
84
4
Tak
ing Pi
cture
s
A histogram shows the 
brightness distribution of an 
image. The horizontal axis 
represents brightness (dark at 
the left and bright at the right) 
and the vertical axis represents 
the number of pixels.
The shape of the histogram 
before and after shooting tells 
you whether the brightness and 
contrast are correct or not, and lets you decide if you need to use EV 
compensation and take the picture again.
Understanding Brightness
If the brightness is correct, the graph peaks in the middle. If the image is 
too dark, the peak is on the left side, and if it is too bright, the peak is on 
the right side.
When the image is too dark, the part to the left is cut off (dark portions) 
and when the image is too bright, the part to the right is cut off (bright 
portions).
Bright portions blink red on the LCD monitor and dark portions blink yellow.
Understanding Contrast
The graph peaks gradually for images in which contrast is balanced. The 
graph peaks on both sides but sinks in the middle for images with a large 
difference in contrast and low amounts of mid-level brightness.
Using the Histogram
Dark portions
Bright portions
N
u
m
b
e
r of
 pix
e
ls
Brightness
(Dark)
(Bright)
Dark image
Correct image
Bright image