Should this be a plus sign?

[ruizengalways]

tfoptflow/tfoptflow/core_warp.py

Line 194 in bdc7a72

query_points_on_grid = batched_grid - flow

[Superlee506]

@ruizengalways I also wonder about this

[JunggiLee12]

Is there any improvement of that~?

[shuaiyuan1996]

This has been discussed in this previous issue #6.

[yaanggny]

I believe a plus is required here. What we need is the remap image from image2. so we need + rather than a "-".

Besides, we can warp an image pair using the flow, the minus way generates bad result of alignment, but the plus one really align the images.
see this comment