The exposure is the amount of light received by the image sensor and is determined by the width of lens
diaphragm opening, the amount of exposure by the sensor (shutter speed) and other exposure parameters. With
this item, users can define how the Auto Exposure function works.
Auto Mode:
- Max Gain:
The maximum gain can be set to reduce the image noises. The max gain can be set from 1 to 3. The default
setting is 3.
- Auto Shutter Mode:
This function is used to control the shutter speed and to adjust the iris automatically according to the light
intensity. It is also effective if a fixed iris lens is being used. The minimum shutter speed range is configurable
from 1 to 1/500 (NTSC) and from 1/1.5 to 1/425 sec. (PAL).
Manual Mode:
With this mode, users can select the suitable shutter speed and gain value to define the camera exposure
according to the environmental illumination. The shutter speed range is from 1/10000 to 1 sec. (NTSC) or from
1/10000 to 1/1.5 sec. (PAL). The gain value can be set from 1 to 9. The image will become brighter as the gain is
set to a higher value.
11.2. White Balance Setting
Display of the White Balance pull-down menu:
To display natural colours, the camera needs to know the reference colour temperature of the light source.
Based on this reference colour temperature the camera will calculate the correct values for all colours. The
camera can perform a measurement by itself or the user can set up the reference colour temperature manually.
The scale unit of the colour temperature is Kelvin [K]. The following list shows the colour temperature of some
light sources for reference.
The users can select one of the White Balance Control modes according to the operating environment.
Light Sources :
Cloudy Sky (Colour Temperature: 6,000 to 8,000 K)
Noon Sun and Clear Sky (Colour Temperature: 6,500 K)
Household Lighting (Colour Temperature: 2,500 to 3,000 K)
75-watt Bulb (Colour Temperature: 2,820 K)
Candle Flame (Colour Temperature: 1,200 to 1,500 K)
Auto Mode :
The Auto White Balance mode is suitable for an environment with a light source having a colour temperature
range from 2700 ~ 7600K.
ATW Mode (Auto Tracking White Balance) :
With the Auto Tracking White Balance function, the white balance in a scene will be automatically adjusted while
temperature colour is changing. The ATW Mode is suitable for environments with a light source having a colour
temperature in the range roughly from 2450 ~ 10500K.
79
English
