"each array element had nearest neighbor connectivity so you
would calculate nine correlations, an autocorrelation and eight cross-correlations, with each of your eight
nearest neighbors, the diagonals and the perpendicular, and then you could interpolate in correlation
space where the best fit was. "
US Patent 5,729,008. Interview with inventor: Oral History of Travis Blalock https://www.youtube.com/watch?v=wmqa9XJED-Q https://archive.computerhistory.org/resources/access/text/20...
"each array element had nearest neighbor connectivity so you would calculate nine correlations, an autocorrelation and eight cross-correlations, with each of your eight nearest neighbors, the diagonals and the perpendicular, and then you could interpolate in correlation space where the best fit was. "
all in analog domain
another one from HP/Agilent/Avago: Oral History of Gary Gordon https://www.youtube.com/watch?v=TxxoWhCzIeU
also this https://blueironip.com/hp-capshare-how-a-failed-product-yiel...