In traditional optical imaging, when high-speed moving objects are photographed under low-light conditions, balancing the contrasting differences between energy acquisition and high-speed motion blur by configuring the integration time is difficult. To solve this problem, a computational imaging method based on combined exposure was proposed. A high-frame-rate camera was used to acquire two adjacent frames to form a combined exposure image pair. Based on the complementary information between the two frames, the motion blur point spread function was estimated, and the restored image with a high signal-to-noise ratio (SNR) was then recovered. Experimental results show that the proposed computational imaging method can solve the blur problem of high-speed object imaging under low-light conditions. Compared with the original degraded image, the restored image obtained by the restoration algorithm is significantly improved in terms of detailed texture. The objective evaluation indices of peak SNR and structural similarity index measure are also improved by greater than 10% over those of the degraded image. Overall, the performance of the proposed computational imaging method is better than that of the existing non-depth learning restoration method, and the image proved to be clear and reliable, exhibiting a good subjective visual effect.
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