Fisheye Dewarp Calibration

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Configuration | Table of Content

 

It relies on the Fisheye Settings tabbed page to configure different Lens Type of a fisheye Camera. NuClient provides Generic Dewarp to manually calibrate all kinds of fisheye cameras for precise dewarp results.

 

To access the Fisheye Settings tabbed page for the Camera:

 

1. From the Tree Console, click the topic Recording Server.

 

2. Click the topic Video Device.

 

3. Click the Video Device to which the camera to configure belongs.

 

By default, the Properties tabbed page then opens at the Configuration Pane.

 

4. Click the Fisheye Settings tab.

 

The Fisheye Settings tabbed page then opens.

 

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5. Choose Generic Dewarp from Lens Type, and a Fisheye Calibration user interface appears.

 

The Original video is displayed in the left window, and its Dewarped video is displayed in the right window.

 

A red Boundary Ellipse marks the visible boundary of a fisheye camera.

 

If the visible boundary is not calibrated well, its dewarped video will not be precise.

 

The purpose of manually calibration is to make Boundary Ellipse exactly stays on the visible boundary.

 

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6. Methods to adjust the Boundary Ellipse:

 

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Operation

Effect

Roll mouse wheel

zoom in / zoom out

Left click and hold

move Boundary Ellipse around

Hold white dot (control point 1)

adjust size of Boundary Ellipse

Hold white square (control point 2)

adjust width / height of Boundary Ellipse

Hold blue dot (control point 3)

rotate Boundary Ellipse

Click button Reset to default

reset default position of Boundary Ellipse

 

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Change Fix center or Keep aspect ratio settings will change behaviors of control points 1-3. Try it!

 

7. A well-calibrated result should be:

 

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8. User can drag inside the right window to move Dewarped video around.

 

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