add Grad filter

Change-Id: I30fc0810c54f3daa31726188a4c3762df33953a7
18 files changed
tree: 3c1c36e3a470fbf1c96dce843fbb036e914a09d8
  1. res/
  2. src/
  3. src_pd/
  4. tests/
  5. tests_camera/