Sony DSLR-A700 - Manual (Page 86)

86
An image can be enlarged for closer examination.
z About Histogram
A histogram is the luminance distribution that shows how many
pixels of a particular brightness exist in the picture. This camera
has four histogram displays that are separately for luminance and
RGB, and each shows the brightness on the horizontal axis (left
side is black, right side is white) and the number of pixels on the
vertical axis. The exposure compensation will change the
histogram accordingly. Below is an example.
Both ends of the histogram consist only of data of 100% black or white*. Checking the histogram allows
you to know the status of the image beforehand.
* To be exact, a color image is expressed with RGB. Thus, the white is equal to R255, G255, B255, and
the black is equal to R0, G0, B0.
Enlarging images
Dark Light
Nu
mber
of
pi
xe
ls
Use the exposure
compensation on
the positive side.
This compensation
brightens the whole
picture, making the
entire histogram shift
to the bright side (right
side). If the exposure
compensation is
applied on the negative
side, the histogram will
shift to the other side.
Multi-selector
(Enlarge) button
Front control dial
(Playback) button
Rear control dial