Electronic Science and Technology ›› 2022, Vol. 35 ›› Issue (6): 28-34.doi: 10.16180/j.cnki.issn1007-7820.2022.06.005

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Semantic Segmentation of Streetscape Based on Improved ExfuseNet

CHEN Jinhong,CHEN Wei,YIN Zhong   

  1. School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
  • Received:2021-02-04 Online:2022-06-15 Published:2022-06-20
  • Supported by:
    National Natural Science Foundation of China(61703277)


When using the ExfuseNet model for streetscape semantic segmentation, due to the high background complexity of the street view image, the area ratio and distribution between the classes of interest are unbalanced. Interesting targets with low area and low density in the image are more likely to be misclassified as they go deeper into the network, which ultimately leads to the degradation of model segmentation performance. To solve this problem, an improved Exfusenet model is proposed. In order to obtain the semantic information of different scales without increasing the amount of model parameters, the multi-monitor module adopts atrous convolution with different rates. After the down-sampling features are fused, the random discarding layer is used immediately to reduce the amount of model parameters and improve the generalization ability. Before the main output, the CBAM attention mechanism module is used to sample the depth semantic information of the target class of interest more efficiently, and the class balance function is used after the multi-supervision module to improve the class imbalance problem of the data set Camvid. The experimental results show that the semantic segmentation effect of the improved ExfuseNet model has been significantly improved, MIOU has increased to 68.32%, and the classification accuracy rate of the Pole class has increased to 38.14%.

Key words: street view image, multiple supervision, dilated rate, dilated convolution, random drop layer, generalization, attention mechanism, class balance, mean intersection over union

CLC Number: 

  • TP391.4