About Overlays - Axis Q6055 User Manual

AXIS Q6055 PTZ Dome Network Camera
Video and Audio
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 12. If required, the focus
control can be disabled under PTZ > Advanced > Controls.
Auto defog - The product will detect fog and automatically filter it out to get a clear image. Select the level of fog removal from the
drop-down list. High implies that maximum fog removal is applied and off implies no fog removal. Auto defog can be activated
incorrectly in scenes with low contrast, high light level variations or when auto focus is slightly off. This can affect the image quality
by for example, increasing image contrast. Also, too much brightness can negatively impact the image quality when defog is active.
Noise reduction - Set to On to enable noise reduction. Noise reduction may increase the amount of motion blur.
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.

About overlays

Overlays are superimposed over the video stream. They are used to provide extra information during recordings, such as a timestamp,
or during product installation and configuration.
About overlay text
An overlay text can include the current date and time, or a text string. When using a text string, so-called modifiers can be used to
display for example the current bit rate or the current frame rate.
You can choose between the following text overlay sizes:
Size
Small
Text height
10 pixels
22
Background height
20 pixels