Automatische Schielwinkelmessung durch Hough-Transformation und Kovarianzfilterung. - Thomas Martin Lehmann; Ansgar Kaupp; Dietrich Meyer-Ebrecht; Rolf Effert (DAGM-Symposium, 1993)

Automatic Strabometry by Hough-Transformation and Covariance-Filtering. - Thomas Martin Lehmann; Ansgar Kaupp; Rolf Effert; Dietrich Meyer-Ebrecht (ICIP (1), 1994)

Automatic measurement of the angle of squint by Hough-transformation and covariance-filtering. - Ansgar Kaupp; Thomas Martin Lehmann; Rolf Effert; Dietrich Meyer-Ebrecht (ICPR (1), 1994)