Monocular digital image correlation 3D panoramic measurement based on plane mirror imaging

Aiming at the problem that the monocular digital image correlation (DIC) system can only measure the information within the object surface, a monocular DIC system is proposed to realize 3D panoramic measurement. That is, using the principle of multi-plane mirror imaging, the front and rear surfaces of the measured object are imaged in a common field of view, and the two optical paths are imaged in two plane mirrors respectively, which extends the monocular into four virtual cameras to realize 3D panoramic measurement. 3D reconstruction and comparative experiments verify the feasibility and accuracy of the method. The results show that the 3D reconstruction of the front and back surfaces of the coin is performed, and the reconstruction results are consistent with the morphology of the decision coin.