Overlay - Axis Q1941-E User Manual

AXIS Q1941-E Thermal Network Camera
Video and Audio
The image Brightness can be adjusted in the range 0–100, where a higher value produces a brighter image.
Increasing the Sharpness can increase bandwidth usage. A sharper image might increase image noise especially in low dynamic
conditions. A lower setting reduces image noise, but the whole image will appear less sharp.
The Contrast changes the relative difference in thermal radiation. It can be adjusted using the slidebar.
Image Correction
To change these settings go to Setup > Video & Audio > Camera Settings.
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.
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 - This setting controls the maximum gain. Lowering the gain reduces the contrast in the thermal image.

Overlay

Overlays are used to provide extra information, such as forensic video analysis or during product installation and configuration.
Overlays are superimposed over the video stream.
An overlay text can display the current date and time, or a text string.
When using a text string, modifiers can be used to display information such as the current bit rate or the current frame rate.
For information about available modifiers, see File Naming & Date/Time Formats in the online help
It is also possible to display text when an action rule is triggered, see Use Overlay Text in an Action Rule.
Note
To enable overlays:
1. Go to Video & Audio > Video Stream and select the Image tab.
2. To include an overlay image, select Include overlay image at the coordinates. The overlay image must first be uploaded to
the Axis product, see Overlay Image.
3. To include date and time, select Include date and Include time.
4. 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
5. Define text overlay characteristics in the relevant fields.
6. Click Save.
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