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Advancement of imaging techniques enables consecutive image sequences to beacquired for quality monitoring of manufacturing production lines. Registrationfor these image sequences is essential for in-line pattern inspection andmetrology, e.g., in the printing process of flexible electronics. However,conventional image registration algorithms cannot produce accurate results whenthe images contain many similar and deformable patterns in the manufacturingprocess. Such a failure originates from a fact that the conventional algorithmsonly use the spatial and pixel intensity information for registration.Considering the nature of temporal continuity and consecution of the productimages, in this paper, we propose a closed-loop feedback registration algorithmfor matching and stitching the deformable printed patterns on a moving flexiblesubstrate. The algorithm leverages the temporal and spatial relationships ofthe consecutive images and the continuity of the image sequence for fast,accurate, and robust point matching. Our experimental results show that ouralgorithm can find more matching point pairs with a lower root mean squarederror (RMSE) compared to other state-of-the-art algorithms while offeringsignificant improvements to running time.

Closed-loop Feedback Registration for Consecutive Images of Moving Flexible Targets