TY  - RPRT
TI  - Optimal estimation of optical flow, time-to-contact and depth 
AU  - Lau, Herbert
AU  - Hong, Tsai-Hong
AU  - Herman, Martin
PY  - 1992
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST IR 4919
DO  - 10.6028/NIST.IR.4919
ER  -