tree 4ae8249fdcf34e03dbe4b90ca09677f4d2d31d16
parent 1e6ce79319059b8a3417e21fd978436af76f6a60
author Sarah Parker <sarahparker@google.com> 1540242862 -0700
committer Sarah Parker <sarahparker@google.com> 1540928957 +0000

Add x and y gradients to image pyramid

This currently uses floating point and will eventually need to
be integerized if disflow proves to give good speedup.

Change-Id: I7038cb8d5769622f9723d264c9996b197fb6d186