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liuziwei7 / voxel-flow

Video Frame Synthesis using Deep Voxel Flow (ICCV 2017 Oral)
https://liuziwei7.github.io/projects/VoxelFlow
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Why using 'meshgrid' as a fixed bias? #3

Open ghost opened 6 years ago

ghost commented 6 years ago

Hi, I'm trying to play with your code because I'm fascinated by your result. However, the 'meshgrid' function in the model really confuse me, it seems like a fixed bias applied to the flow, but I cannot see the meaning of doing this. Can't this be trained with the previous layer instead of applying a fixed one?

sesse commented 6 years ago

I haven't checked this thoroughly, but as far as I can understand, meshgrid() initializes the flow to be neutral, instead of everybody picking out the same pixel. That's a much more reasonable starting point.

Note that the meshgrid() here is not the same as tf.meshgrid()! The code appears to be written for pre-1.0 TF, which probably didn't have tf.meshgrid().