US 7,321,679 B2
Machine for inspecting glass bottles
Joe J. Dordoni, Watkins Glen, N.Y. (US); Sarath G. Tennakoon, Elmira, N.Y. (US); Michael M. Rentschler, Burdett, N.Y. (US); Richard D. Diehr, Horseheads, N.Y. (US); and Kee Sin Loo, Singapore (Singapore)
Assigned to Emhart Glass SA, Cham (Switzerland)
Filed on Jul. 02, 2004, as Appl. No. 10/883,885.
Prior Publication US 2006/0008133 A1, Jan. 12, 2006
Int. Cl. G06K 9/00 (2006.01)
U.S. Cl. 382—142 1 Claim
OG exemplary drawing
 
1. A machine for inspecting glass stippled bottles for defects comprising
an inspection station including
means for supporting a stippled bottle for inspection,
a light source for illuminating a stippled bottle supported at the inspection station,
imaging means for imaging the illuminated stippled bottle on a pixel matrix, the pixels of the image varying in intensity from bright to gray at the points of stippling,
computer means for evaluating the pixels of the image including a look up table for values to be assigned to specific light intensities from light to black, the plot of said look up table having a high gain portion from black to gray and a continuous low gain portion from gray to white.