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Bincheng Xiong

at Huazhong Univ of Science and Technology

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Proceedings Article | 8 March 2018 Paper

The selection of the optimal baseline in the front-view monocular vision system

Bincheng Xiong, Jun Zhang, Daimeng Zhang, Xiaomao Liu, Jinwen Tian

Proceedings Volume 10609, 106090F (2018) https://doi.org/10.1117/12.2283470

KEYWORDS: Image segmentation, Imaging systems, Cameras, Error analysis, Image fusion, Image resolution, Computing systems, Motion models, Multispectral imaging, Image processing

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In the front-view monocular vision system, the accuracy of solving the depth field is related to the length of the inter-frame baseline and the accuracy of image matching result. In general, a longer length of the baseline can lead to a higher precision of solving the depth field. However, at the same time, the difference between the inter-frame images increases, which increases the difficulty in image matching and the decreases matching accuracy and at last may leads to the failure of solving the depth field. One of the usual practices is to use the tracking and matching method to improve the matching accuracy between images, but this algorithm is easy to cause matching drift between images with large interval, resulting in cumulative error in image matching, and finally the accuracy of solving the depth field is still very low. In this paper, we propose a depth field fusion algorithm based on the optimal length of the baseline. Firstly, we analyze the quantitative relationship between the accuracy of the depth field calculation and the length of the baseline between frames, and find the optimal length of the baseline by doing lots of experiments; secondly, we introduce the inverse depth filtering technique for sparse SLAM, and solve the depth field under the constraint of the optimal length of the baseline. By doing a large number of experiments, the results show that our algorithm can effectively eliminate the mismatch caused by image changes, and can still solve the depth field correctly in the large baseline scene. Our algorithm is superior to the traditional SFM algorithm in time and space complexity. The optimal baseline obtained by a large number of experiments plays a guiding role in the calculation of the depth field in front-view monocular.

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