Precision Edge Contrast and Orientation Estimation. - Edward P. Lyvers; Owen Robert Mitchell (IEEE Trans. Pattern Anal. Mach. Intell., 1988)

Subpixel Measurements Using a Moment-Based Edge Operator. - Edward P. Lyvers; Owen Robert Mitchell; Mark L. Akey; Anthony P. Reeves (IEEE Trans. Pattern Anal. Mach. Intell., 1989)