Locally Consistent Deformable Convolution as part of deformable flow
Essential part of deformable flownet.
Based on: Deformable Convolutional Networks https://arxiv.org/pdf/1703.06211.pdf
Also seen in (developed independently): Learning Motion in Feature Space: Locally-Consistent Deformable Convolution Networks for Fine-Grained Action Detection https://arxiv.org/pdf/1811.08815.pdf