ESPNetv2:
ESPNetv2: A Light-weight, Power Efficient, and General Purpose Convolutional Neural Network (CVPR2019)
https://arxiv.org/pdf/1811.11431.pdf PyTorch: https://github.com/sacmehta/ESPNetv2 主要在ESPNet的基础上改进,
特点:
为了计算更加高效,见Figure 1:
- 将原来ESPNet的point-wise convolutions 替换为group point-wise convolutions;
- 将原来ESPNet的dilated convolutions 替换为depth-wise dilated convolution;
- HFF加在depth-wise dilated separable convolutions 和 point-wise (or 1 × 1) 卷积之间,去除gridding artifacts ;
- 使用© 中一个 group point-wise convolution 替换(b)K 个point-wise convolutions ;
- 为了网络表示更有效,见Figure 2 :
- 将©中depth-wise dilated convolutions 加入下采样操作;
- 加入平均池化(average pooling ),将输入图片信息加入EESP中;
- 使用级联(concatenation) 取代对应元素加法操作(element-wise addition operation );
- 不同类型的卷积参数量和感受野比较:
- 最后的分类网络结构: