tree 3fb4c3aac4fa91effd6e1d094b37a2a7f9ba9733
parent 0d93bc1f0cbd81bd3b5f6de5303bdee61f01c840
author Sarah Parker <sarahparker@google.com> 1542147492 -0800
committer Sarah Parker <sarahparker@google.com> 1542151071 +0000

Only compute image gradients for source image

Spatial gradients are only needed from one image to compute the
optical flow field.

Change-Id: I87861547cb2996c1a61900423ef2a0008c3aa536