Axis Q61 Series User Manual page 18

AXIS Q6128-E PTZ Network Camera
Video
Exposure Settings
Exposure control - These settings is used to adapt to the amount of light used. Automatic is the default setting and it can be
used in most situations. The shutter speed is automatically set to produce optimum image quality. Use Manual if you have special
requirements for the exposure setting and wish to lock it. Select the desired exposure time from the drop-down list.
Max exposure time - Shutter speed, also called 'exposure time', stands for the length of time the camera shutter is open, thereby
exposing the camera sensor to light. If shutter speed is fast it can freeze action effectively. If shutter speed is slow, it can cause
moving objects to appear blurred. Decreasing the exposure time will reduce motion blur.
Allow slow shutter - Select Allow slow shutter to let the camera decrease the shutter speed in low light to improve image brightness.
Enable Backlight compensation - Select Enable Backlight compensation if a bright spot of light such as a light bulb, causes other
areas in the image to appear too dark.
Enable Highlight compensation - This setting detects bright lights from a source such as a torch or car headlights and masks that
image area. The feature is useful when the camera operates in a very dark area where a bright light may overexpose part of the image
and prevent the operator from seeing other parts of the scene.
Max gain - Measured in decibels (dB), gain describes the amount of amplification applied to a signal, in this case the visual
information in the image. A high level of amplification may provide a better image in very low light situations. A high gain will also
increase the amount of image noise.
Exposure zones - This setting determines which part of the image is used to calculate the exposure. For most situations, the Auto
setting can be used. For particular requirements, select a predefined area.
IR cut filter - The IR cut filter prevents infrared (IR) light from reaching the image sensor. In poor lighting conditions, or when
using an external IR lamp, set the IR cut filter to Off. This increases light sensitivity and allows the product to "see" infrared light.
The image is shown in black and white when the IR cut filter is off. Set the IR cut filter to Auto to automatically switch between
On and Off according to the lighting conditions.
Day/Night shift priority - Use the Day/Night shift priority bar to determine when the camera shifts into either day mode or night
mode. By default, the camera will automatically change from day to night mode at a pre-defined level which corresponds to light
conditions. By dragging the bar handle towards the sun, the camera will change to day mode earlier and change to night mode late.
Image Settings
Important
The autofocus behavior is affected by factors such as light conditions, contrasts in the scene, and objects moving in and out. In
these conditions or scenes, a manual focus could be preferable to enhance performance and allow the camera to focus faster.
Autofocus enabled - Autofocus enables the camera to focus although the distance to different objects of interest is constantly
changing. Whenever the camera's pan/tilt/zoom position is changed, the autofocus performs a search to find the ideal focus point.
Automatic focusing is enabled by default. If the focus position is changed manually using the focus bar, autofocus will be disabled
even if enabled in Image Settings. In this case, use the PTZ control panel to enable autofocus, see page 10. If required, the focus
control can be disabled under PTZ > Advanced > Controls.
Defog - Select this feature to counter the effects of foggy weather and get a clear image.
Noise reduction - Set to On to enable noise reduction. Noise reduction may increase the amount of motion blur.
Stabilizer - When monitoring environments that are subject to vibrations (e.g. traffic control), images may appear to be unsteady.
Select On to steady the image. See the online help
Image freeze on PTZ - Select All movements to freeze the image while the camera is moving during a pan, tilt or zoom operation.
Once the camera reaches its new position, the view from that position is shown. Presets freezes the image only when the camera
moves between preset positions.
for more information.
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