About the range of offset

[Chris-city]

Thank you for your work. I have a question, whether the range of offset_conv related to the kernel size of offset_conv, for example, whether the offset_conv of 3*3 can only consider the offset of one point around each pixel in the layer?

[HaozhiQi]

For this paper, the output of offset_conv is initialized to be 0 and does not have constraint during training.

In theory the offset can be very large but in practice it usually attends more on semantic meaningful regions.