转置卷积与空洞卷积
转置卷积
将卷积过程”反过来”的运算,常用于上采样。同一参数下,标准卷积与转置卷积的对比:
m = 3 · p = 0 · s = 1
m = 3 · p = 0 · s = 2
m = 3 · p = 0 · s = 1
m = 3 · p = 0 · s = 2空洞卷积
在卷积核元素之间插入”空洞”,扩大感受野而不增加参数量:
d = 1(等价于标准卷积)
d = 2(感受野扩大)m 卷积核大小
p 零填充(zero-padding)
s 步长(stride)
d 膨胀率(dilation)
图片修改自:Vincent Dumoulin, Francesco Visin — A guide to convolution arithmetic for deep learning