About Overlays - Axis Q1942-E User Manual

AXIS Q1942-E PT Mount Thermal Network Camera
About video settings
About Electronic Image Stabilization (EIS)
When monitoring an environment that is subject to vibrations such as a train station, or when the camera is mounted on a pole,
images may appear unsteady. To automatically improve image stability, select Electronic image stabilization (EIS) from Video &
Audio > Camera Settings.
About exposure settings
Configure the exposure settings to suit the image quality requirements in relation to temperature variations in the scene.
Automatic gain control - This setting is used to automatically adjust the gain to an appropriate range, the weaker the image signal,
the stronger the gain. Select the Linear or Equalization automatic gain control method. The latter uses a histogram equalization
method, which adjusts the gain dynamically by distributing the most frequent intensity values.
Exposure zones - This settings determines which part of the image is used to calculate the exposure. For most situations, the Auto
setting can be used. For particular requirement, select Defined and then click Edit and select one of the predefined areas.
Gain - Gain is the amount of amplification applied to an image signal. More gain means more contrast and more details but also
more noise. The max gain value is set for all scenes, but affects primarily low contrast scenes controlling the amount of allowed noise
in the image, which in turn also limits the contrast.

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
Medium
Large
It is also possible to display text when an action rule is triggered, see How to include overlay text in an action rule on page 20.
How to include overlay text
1. Go to Video > Video Stream and select the Image tab.
2. To include date and time, select Include date and Include time.
3. To include a text string, select Include text and enter the text in the field. Modifiers can be used, see File Naming &
Date/Time Formats in the online help
4. Select size, color, and placement of the text string.
5. Click Save.
To modify the date and time format, go to System Options > Date & Time. See Date & Time on page 41.
How to include overlay text in an action rule
Example
Text height
10 pixels
16 pixels
21 pixels
.
20
Background height
20 pixels
28 pixels
36 pixels