• White balance: White balance is evaluated for every image and may even
be restricted to specific reference areas within the image. This results in the
MOBOTIX camera's true and brilliant colors.
• Auto contrast: Unfavorable weather conditions (rain, fog, etc.) reduce image
contrast, but as the contrast is amplified automatically, the camera always
uses the complete brightness range (from 0 to 100%).
• Sharpness: The high image quality of MOBOTIX cameras can also be attrib-
uted to the integrated, software-based sharpness filter. It almost fully com-
pensates reduced image contrast due to dirty lenses and optical phenom-
ena attributed to aging lenses.
• Night Improvement: This feature amplifies images taken with very little light.
As the MOBOTIX cameras are backlight-proof, no auto iris
is required in the lens. This allows installing an inexpensive
and maintenance-free lens with fixed aperture in the cam-
era. As this eliminates the need for moving parts, there is
nothing that could freeze-lock in low temperature condi-
tions (Antarctica, mountains, cooling facilities). It also
means that the dark image parts of backlight situations can
be better enhanced since there is no auto iris that reduces
the amount of light on the image sensor.
5.7.3 Backlight Correction
Although equipped with automatic exposure control, most regular video cameras
have huge problems handling backlight situations. The camera software needs to
decide which image areas are to be properly exposed in a backlight situation, i.e.
proper exposure of the dark image parts will lead to overexposure of the bright
parts, proper exposure of the bright image parts will lead to underexposure of the
dark parts.
MOBOTIX cameras, on the other hand, solve this problem by using exposure win-
dows. The automatic exposure control features use these windows for measuring
exposure, rather than the entire
image area (see also section 5.7.6,
Exposure Windows
).
The live image of a bank scene
(see figure) clearly shows the sun-
light glaring through the window
opposite the bank teller. This
would "blind" a normal camera
lens and render the area at the
bottom of the image (faces, etc.)
too dark to be of use. The
MOBOTIX camera was configured
on site, and selecting the prede-
fined
Bottom
exposure window in
© MOBOTIX AG • Security-Vision-Systems • Made in Germany
www.mobotix.com • sales@mobotix.com • 10.10.2006
123/288
Software Camera Manual Part 2
Activated night improve-
ment may increase dark
noise
MOBOTIX cameras are
backlight-proof
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