Simple Static Calibration with Marker

The Static Calibration tool is to provide a quick and easy way to quickly align a static camera that does not move or do any pan/tilt/roll. At the end of this calibration, the camera would be placed relative to predefined markers..

*There will be NO lens profile or alignment profile generated from this tool after the calibration.
All coordinates as well as all intrinsic (distortion) values will be set directly within the camera object.

Prerequisites

• Media Input into SP
• A camera object within SP

Adding Markers

!The placement of these markers should not be too far away from each other. Ideally, the camera should be able to see at least 4 of these markers per observation.

• Add a Measurement Point from the object tree, and place this point at the coordinate that matches the coordinate of a physical marker in the physical world.
• Repeat this process for all of your measurement points.

*It is a good idea to re-name these measurement points to something that is meaningful and easily identifiable.

Adding the Simple Static Calibration with Marker Tool

If you have all the components ready as mentioned in the prerequisites section, you can set up the project to be ready for the Tracking Alignment.

1. Under the camera object – Tools, add a Calibration – Simple Static Calibration with Marker
2. click on the “Image Calibration” button to open up the Image Calibration Wizard

Start Capturing

*Only 1 image is required for this calibration tool.

1. Do the standard setup of selecting your image provider for your camera feed and choosing the calibration screen that will be used to position the camera
2. move/rotate the camera and aim the camera such that it can see at least 4 of the markers in the space.
3. To capture an image click on the icon:

Labeling the Markers from the Captured Observations.

• Once you have captured an image, you can click on the “Observations” button to open up the side panel to show all the captured observations.
• Double click on one of the observations to view the captured image.
• Press “F” on the keyboard will rescale the image to be full screen within the wizard UI
• Right click on the image where the measurement point is located to add a marker; a pop up list would show all the measurement points in the SP project, select from that list the measurement point that matches the location of the selected marker. Repeat this step for all of the markers visible in this image
• Press “ALT+(1-9)” to zoom in and cycle thru each of the markers added in the previous step.
• using the keyboard arrow keys to move the marker around to get to the exact pixel within the image of where the marker is located. You can hold down “SHIFT” while using the arrow keys for fine adjustments.
• Pressing “F” can go back to full screen view of the image.
• After finishing adjusting all markers location, press the “close viewer” button at the top right to close this observation, and go back to the previous view.

Run Calibration

1. press the icon to run the calibration process.

The camera should be repositioned within SP to the appropriate location relative to the calibration screen. You can open up the distortion viewer to double check if the alignment looks good or not.