Fix for plane track jittering

Jittering was caused by homography not being estimated
accurate enough.

Before this, only algebraic estimation was used, which
is indeed not so much great, Now use algebraic estimation
followed with refinement step using Ceres minimizer.

The code was already there since keyframe selection patch,
made such estimation a generic function in multiview/ and
changed API for estimation in order to pass all additional
options via an options structure (the same way as it's
done fr Ceres).

This includes changes to both homography and fundamental
estimation.

TODO:
- Need to document Ceres functors better.
- Need to support homogeneous coordinates (currently
  only euclidean coords are supported).

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/tracking.c b/source/blender/blenkernel/intern/tracking.c
index fd92ec9f462..b8711f6e5f6 100644
--- a/source/blender/blenkernel/intern/tracking.c
+++ b/source/blender/blenkernel/intern/tracking.c
@@ -3340,7 +3340,7 @@ static void track_plane_from_existing_motion(MovieTrackingPlaneTrack *plane_trac
 			break;
 		}
 
-		libmv_homography2DFromCorrespondencesLinear(x1, x2, num_correspondences, H_double, 1e-8);
+		libmv_homography2DFromCorrespondencesEuc(x1, x2, num_correspondences, H_double);
 
 		mat3f_from_mat3d(H, H_double);
 
@@ -3444,7 +3444,7 @@ void BKE_tracking_homography_between_two_quads(/*const*/ float reference_corners
 	float_corners_to_double(reference_corners, x1);
 	float_corners_to_double(corners, x2);
 
-	libmv_homography2DFromCorrespondencesLinear(x1, x2, 4, H_double, 1e-8);
+	libmv_homography2DFromCorrespondencesEuc(x1, x2, 4, H_double);
 
 	mat3f_from_mat3d(H, H_double);
 }