1x1 Convolution with padding = 0, stride = 1, dilation = 2

1

I am trying to understand what is happening in the scenario where I have a 2d
convolutional layer with the following parameters:

2d_conv = nn.Conv2d(3, 3, kernel_size=1, stride=1,
padding=0, bias=False, dilation=2)

Is this just the same as a regular 1x1 2-d convolution, since I’m not sure what effect
the dilation would have.

I am asking since in the paper describing the a-trous algorithm modification of a resnet-101 backbone in R-FCN the authors write:

All layers before and on the conv4 stage [9] (stride=16) are unchanged; the stride=2 operations in the first conv5 block is modified to have stride=1, and all convolutional filters on the conv5 stage are modified by the “hole algorithm” [15, 2] (“Algorithme à trous”) to compensate for the reduced stride

2

When kernel_size=1, dilation has no effect.
See this page for a visualization of dilation : for only 1 pixel as input, should not change a thing.