Visualize offsets

[Youngkl0726]

hi, will you update the code to Visualize offsets?

[ChunhuanLin]

Sorry, I am quite busy recently, but I will find a time to finish the job.

[bkvie]

Hi I would be willing to work on that, offset happens in https://github.com/ChunhuanLin/deform_conv_pytorch/blob/master/deform_conv.py#L115 however I am unsure as how the offset is combined when stacked qith q_lb, q_rt ... Some explanation would go a long way!

[ChunhuanLin]

@bkvie Hey, through the q_lb, q_rt ..., we can get the bilinear kernel weight and the corresponding feature value of this position, then we can get the final feature of current location.

[b762927]

Can it reach the paper benchmark？