实验环境：tensorflow版本1.2.0，python2.7
介绍
关于空洞卷积的理论可以查看以下链接，这里我们不详细讲理论：
1.Long J, Shelhamer E, Darrell T, et al. Fully convolutional networks for semantic segmentation[C]. Computer Vision and Pattern Recognition, 2015.
2.Yu, Fisher, and Vladlen Koltun. “Multi-scale context aggregation by dilated convoluti
