PT Unknown
AU Patricia Marquez
   Debora Gil
   Aura Hernandez-Sabate
TI Error Analysis for Lucas-Kanade Based Schemes
BT 9th International Conference on Image Analysis and Recognition
PY 2012
BP 184
EP 191
VL 7324
IS I
DI 10.1007/978-3-642-31295-3_22
LA english
DE Optical flow; Confidence measure; Lucas-Kanade; Cardiac Magnetic Resonance
AB Optical flow is a valuable tool for motion analysis in medical imaging sequences. A reliable application requires determining the accuracy of the computed optical flow. This is  a main challenge given the absence of ground truth in medical sequences. This paper presents an error analysis of Lucas-Kanade schemes in terms of intrinsic design errors and  numerical stability of the algorithm. Our analysis provides a confidence measure that is naturally correlated to the accuracy of the flow field. Our experiments show the higher  predictive value of our confidence measure compared to existing measures.
ER