Dewarping Functionality On DW Spectrum
-----------------------------------
Affected Roles: Owner, Administrator
Related Digital Watchdog VMS Apps: DW Spectrum
Complexity: Low
Last Edit: August 21, 2024
-----------------------------------
Fisheye Dewarping
Fisheye cameras are practical when users want to survey a wide area using a single-lens camera. However, monitoring the camera stream can be disorienting as the camera video will appear warped when initially viewing the camera.
DW Spectrum IPVMS allows users to utilize its Fisheye Dewarping feature to convert the image from a warped, fisheye view into a panoramic view for both RTSP and ONVIF connected cameras, providing the user with a more comfortable way to monitor the camera.
This article will outline how to use the Fisheye Dewarping feature in DW Spectrum.
Supported/Affected Devices
- DW Blackjack Series
- DW MEGApix Camera Series (fisheye cameras)
Enabling Fisheye Dewarping
When a fisheye camera is first added to the DW Spectrum Server, the Fisheye Dewarping tool is unavailable in the camera’s miniature toolbar.
To enable Fisheye Dewarping:
- Right-click on the camera, then select Camera Settings.
- Select the Dewarping tab.
Enable the Dewarping toggle.
- A highlighted circle will overlay the camera’s fisheye display.
Select if the camera is installed by Ceiling Mount, Wall Mount, or Floor/Table Mount.
- Ceiling and Floor/Table Mount allow for 90°, 180°, and 360° dewarping modes.
- Wall Mount allows for 90° and 180°.
Click the Auto Calibration button to prompt DW Spectrum to automatically size the highlighted area to the camera fisheye lens. Or use the sizing tools to manually shape the highlighted area.
Note: Lighting and other environmental factors can affect auto-calibration's ability to correctly identify the image. Consider auto-calibrating, then fine-tuning the settings to your needs.
Click the Apply button to save the settings, then click the OK button to close the Camera Settings menu.
- Select your desired lens projection.
Equidistant: Maintains scale from the central point to the edges of the image. The most common form of fisheye projection.
Stereographic: Projects the scale of the image with no consideration of the central point.
Equisolid: Maintains an equal area for each pixel regardless of its position.
- The camera’s Dewarping tool will now display in the camera’s miniature toolbar.
Click the Dewarping tool icon to convert the camera view into a panoramic picture.
- The fisheye camera will now display in either a 90-degree, 180-degree, or 360-degree, dewarped view.
Click the Orange Circle to change the Dewarping Mode.
- Use the digital joystick and zoom control to maneuver the camera view and digitally zoom the camera.
360° Equirectangular Dewarp
As of Spectrum version 5.1, the dewarping function include a 360° Equirectangular option as an alternative to fisheye.
This option will allow you to navigate the image using the PTZ controls to view your camera as if the image is mapped out.
The α and β options allow you to fine-tune the function in relation to the horizon.
For More Information or Technical Support
DW Technical Support: 866.446.3595 (option 4)
https://www.digital-watchdog.com/contact-tech-support/
______________________________________________________________________________
DW Sales: 866.446.3595 [email protected] www.digital-watchdog.com
