TY - RPRT TI - Validation of an optical flow method for tag displacement estimation. AU - L Dougherty AU - J C Asmuth AU - A S Blom AU - L Axel AU - R Kumar PY - 1999 DO - 10.1109/42.768845 UR - https://pubmed.ncbi.nlm.nih.gov/10385293/ ID - 10385293 ER -