Free vibration monitoring experiment of a stayed-cable model based on stereovision

•This paper proposes a stereovision-based 3D deformation measurement method.•A Canny-Zernike combination algorithm achieve 0.02 accuracy for edge detection.•Kalman filter is used to track circular targets on dynamic sequential images.•A free vibration test of a stayed-cable model is conducted in lab.•Experiment results verify the reliabil...More