I.R.I.S. 402 - Manual (Page 14)

Image Settings:
Brightness:! The luminance of image view. Default value is 8; adjustable from 0 to 16.
Contrast: The ratio of luminance of white to black. Default value is 8; adjustable from 0 to 16.
Saturation: Depth of a colour in relation to it’s brightness. Default value is 8, adjustable from 0 to 16.
Sharpness: Determines the degree of edge contrast of objects within the image. Default value is 8,
adjustable from 0 to 16.
Video Orientation:
Changes the horizon ( Mirror ) and vertical ( Flip ) orientation of the image.
Day / Night :
Day night mode is used to switch the video images for Day (plenty of ambient light), or Night (low ambient
light) optimization. The default setting is Auto in which the camera will switch to Day or Night operation
depending on the intensity of ambient light in the scene. The Day / Night modes perform two actions;
switching the mechanical IR filter on or off whilst also switching the image hue from Colour (Day) to
Monochrome (Night).
In day mode, the IR filter is switched in to avoid the image sensor from receiving the infrared, thus the true
color image is provided. When camera enters night mode, IR filter is switched off to allow IR illuminations
going into the sensor, thus increasing the images light level. The image color is switched to B/W (Mono
mode).
Advanced Settings:
AC Frequency: Anti-flicker setting for environment with fluorescent light sources, image sensor needs to set
the frequency of light (power) source. For instance, the power frequency is 50Hz for most European
countries, while 60Hz is typically for US. This setting is therefore regionally different.
White Balance: Usually set to Auto. Manual configuration allows adjustment of colour temperature in
accordance with the lighting condition of the scene, varying from blue to red.
IRIS Mode: Enable auto IRIS mode when DC-Iris lens is installed. System will enable auto exposure and
gain control (default setting is Auto).
Flicker-less Mode: flickering can also effect exposure levels. Set “Flickerless” Mode “On” to fix the
maximum shutter speed (auto exposure control), eliminating flicker.
Exposure & Gain Mode: Selectable between auto and manual mode. This selection defines control over a
range (manual) or a fixed value (auto), according to the following two items (Shutter Speed and Gain
Value). The configurations will be limited at selected maximum rates when AUTO mode is on.
Max. Shutter Speed: Sets exposure time. Higher shutter speed is normally applied under strong light
conditions, so the image won’t be overexposure. Lower shutter speed, on the other hand maintains image
luminance in low light environment.
Max. Gain Value: the amplification factor for the incoming light. Increasing the gain value provides a brighter
image, but the noises may also be increased.
WDR: Wide Dynamic Range. Switches dynamic processing of image under high contrast conditions.
Exposure Level: Adjust Exposure level for a target exposure time that is the amount of light allowed
for the image sensor.
Note:
The “Shutter Speed”, “Gain Value” and “WDR” can be configured for daytime and nighttime. The
configurations will be applied according to the current status of “Day/Night Mode“.