US 7,321,671 B2
System and method for generating a preview display in a print capturing system using a non-planar prism
George W McClurg, Jensen Beach, Fla. (US); Greg L Cannon, Boynton Beach, Fla. (US); and Richard V Voorhees, Palm Beach Gardens, Fla. (US)
Assigned to Cross Match Technologies, Inc., Palm Beach Gardens, Fla. (US)
Filed on Dec. 03, 2003, as Appl. No. 10/725,541.
Claims priority of provisional application 60/491537, filed on Aug. 01, 2003.
Claims priority of provisional application 60/431240, filed on Dec. 06, 2002.
Prior Publication US 2004/0109589 A1, Jun. 10, 2004
Int. Cl. G06K 9/00 (2006.01)
U.S. Cl. 382—124 11 Claims
OG exemplary drawing
 
1. A method for generating a preview of a print pattern on a substantially conical platen surface, an image of the print pattern being captured in a scan made up of a series of radial scan line images along an arcuate path, comprising:
for each group of radial scan line images, the steps of:
determining a representative sensor pixel value for pixels in a group of captured radial scan line images;
converting a polar coordinate position of the respective group of captured radial scan line images to a position in rectangular display window coordinates;
plotting the representative sensor pixel values determined in said determining step at corresponding rectangular display window coordinates; and
displaying the plot of the representative sensor pixel values in a display window as a preview of the print pattern image captured on the substantially conical platen surface.