Flexible camera-projector calibration using superposed color checkerboards
What's it about?
Typically, the calibration of structured-light systems for three-dimensional imaging is difficult because the camera and the projector must be calibrated together. The calibration could be simplified if the position and orientation of the devices are controlled or known. However, the process becomes cumbersome and susceptible to misalignment errors.
Why is it important?
In this paper, a flexible camera-projector calibration method, which does not constrain the position and orientation of the camera, the projector, and the reference plane, is proposed. For this, a physical checkerboard of a specific color is placed on the reference plane while the projector device projects another checkerboard with a different color. Thus, from an image captured by the camera, the two superposed checkerboards are recovered allowing the simultaneous calibration of the camera and the projector.