Abstract
The accuracy of road region extraction is an important factor for the safety and reliability of intelligent driving system. Due to the shadow greatly affects the result of road region extraction in practical applications, the shadow effect weakening on a single image by the optical principles and theories is meaningful. To weaken the shadow effect, we extract the intrinsic images of road scenes based on logarithm domain projection. The intrinsic image has an advantage to remove the shadow effect. Thus, we propose effective projection angle calculation methods in logarithmic domain based on simple statistic, which can eliminate the impact of the direction of camera features. Furthermore, the best whole time projection angle with practical application can be obtained for rapid acquisition of intrinsic image. In the experiment, the proposed methods can weaken the shadow effect for road scene images. In order to evaluate intrinsic image extracted by the proposed methods, the same road detection method is implemented to extract road region. The results demonstrate that the road region detection accuracy based on intrinsic image extracted by our methods are better than the compared methods.
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Acknowledgements
The authors would like to thank Xingang Li and Yang Li in Beijing Normal University for improving the English of this paper. This research is funded by National Natural Science Foundation of China Grant Nos. 61401455 and 41801241.
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Tong, G., Li, Y., Sun, A. et al. Shadow effect weakening based on intrinsic image extraction with effective projection of logarithmic domain for road scene. SIViP 14, 683–691 (2020). https://doi.org/10.1007/s11760-019-01596-0
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DOI: https://doi.org/10.1007/s11760-019-01596-0