Figure 2From: Optical Flow Active Contours with Primitive Shape Priors for EchocardiographyExample of an optical flow field on a Rubik's cube rotated image. (a) Cube at time . (b) Cube at time . (c) Optical flow of image (a) to (b) using Lucas-Kanade method (Originally published inRussell and Norving [22]).Back to article page