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An angular orientation of a lattice image pattern is found by forming a composite image of superimposed portions of a lattice image by aligning centroids of a lattice element in each portion, and determining a lattice axis from a line fit through centroids of lattice elements in the composite image.

An angular orientation of a lattice image pattern is found by forming a composite image of superimposed portions of a lattice image by aligning centroids of a lattice element in each portion, and determining a lattice axis from a line fit through centroids of lattice elements in the composite image. The composite image is formed by selecting a seed pixel, finding a local minimum near the seed pixel and then finding a centroid based on the local minimum. From the centroid, it is determined whether the glyph centroid has sufficient contrast to be included in the composite image. The composite image is formed by superimposing subsamples of the lattice image based on glyph centroids. The composite image is then analyzed to determine a lattice axis through centroids in the composite image, and determining a quadrant image based on the lattice axis.

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An angular orientation of a lattice image pattern is found by forming a composite image of superimposed portions of a lattice image by aligning centroids of a lattice element in each portion, and determining a lattice axis from a line fit through centroids of lattice elements in the composite image.

An angular orientation of a lattice image pattern is found by forming a composite image of superimposed portions of a lattice image by aligning centroids of a lattice element in each portion, and determining a lattice axis from a line fit through centroids of lattice elements in the composite image. The composite image is formed by selecting a seed pixel, finding a local minimum near the seed pixel and then finding a centroid based on the local minimum. From the centroid, it is determined whether the glyph centroid has sufficient contrast to be included in the composite image. The composite image is formed by superimposing subsamples of the lattice image based on glyph centroids. The composite image is then analyzed to determine a lattice axis through centroids in the composite image, and determining a quadrant image based on the lattice axis. 56/071; US-3715031, 19730200, Okkonen, 209/075; US-3725667, 19730400, Schwartz, 250/219.DQ; US-3764899, 19731000, Peterson et al., 324/061.R; US-3778628, 19731200, Novak et al., 250/556; US-3782543, 19740100, Martelli et al., 209/075; US-3798603, 19740300, Wahlberg, 340/149.A; US-3800078, 19740300, Cochran et al., 178/007.1; US-3806710, 19740400, Shigemori et al., 235/092.SB; US-3815021, 19740600, Kerr, 324/061.R; US-3842281, 19741000, Goodrich, 250/461; US-3870629, 19750300, Carter et al., 209/111.8; US-3906449, 19750900, Marchak, 340/149.R; US-3930582, 19760100, Gartner et al., 209/088; US-3966047, 19760600, Steiner, 209/075; US-3976198, 19760800, Carnes, Jr. et al., 209/111.7T; US-4023011, 19770500, Nakajima et al., 235/061.11R; US-4041456, 19770800, Ott et al., 382/135; US-4096991, 19780600, Iguchi, 235/419; US-4109238, 19780800, Creekmore, 340/149.A; US-4114804, 19780900, Jones et al., 235/476; US-4147430, 19790400, Gorgone et al., 356/051; US-4166945, 19790900, Inoyama et al., 235/379; US-4179685, 19791200, O'Maley, 340/146.3H; US-4187463, 19800200, Kivenson, 324/228; US-4205780, 19800600, Burns et al., 235/454; US-4231014, 19801000, Ponzio, 340/146.3Y; US-4237378, 19801200, Jones, 250/223.R; US-4250806, 19810200, Boyson et al., 101/002; US-4255651, 19810300, Phillips, 235/092.SB; US-4264808, 19810400, Owens et al., 235/379; US-4275874, 19810600, DiBlasio, 271/004; US-4277774, 19810700, Fujii et al., 340/146.3Q; US-4283708, 19810800, Lee, 340/146.3Z; US-4288781, 19810900, Sellner et al., 340/146.3Q; US-4302781, 19811100, Ikeda et al., 358/486; US-4310885, 19820100, Azcua et al., 364/405; US-4311914, 19820100, Huber, 250/556; US-4313598, 19820200, DiBlasio, 271/124; US-4321672, 19820300, Braun et al., 364/408; US-4334619, 19820600, Horino et al., 209/551; US-4337864, 19820700, McLean, 209/534; US-4348656, 19820900, Gorgone et al., 340/146.3R; US-4349111, 19820900, Shah et al., 209/534; US-4352988, 19821000, Ishida, 250/559; US-4355300, 19821000, Weber, 340/146.3C; US-4355369, 19821000, Garvin, 364/900; US-4356473, 19821000, Freudenthal, 340/146.3H; US-4360034, 19821100, Davila et al., 133/003.D; US-4381447, 19830400, Horvath et al., 250/223.R; US-4383540, 19830500, DeMeyer et al., 133/003.H; US-4386432, 19830500, Nakamura et al., 382/007; US-4396902, 19830800, Warthan et al., 382/064; US-4416299, 19831100, Bergman, 133/001.R; US-4420153, 19831200, Winkler et al., 271/304; US-4441205, 19840400, Berkin et al., 382/008; US-4442541, 19840400, Finkel et al., 382/007; US-4449240, 19840500, Yoshida, 382/015; US-4461028, 19840700, Okubo, 382/015; US-4464786, 19840800, Nishito et al., 382/007; US-4464787, 19840800, Fish et al., 382/007; US-RE31692, 19841000, Tyburski et al., 382/007; US-4480177, 19841000, Allen, 235/379; US-4487306, 19841200, Nao et al., 194/004.C; US-4490846, 19841200, Ishida et al., 382/007; US-4513439, 19850400, Gorgone et al., 382/007; US-4530067, 19850700, Dorr, 364/900; US-4538719, 19850900, Gray et al., 194/100.A; US-4539702, 19850900, Oka, 382/007; US-4542829, 19850900, Emery et al., 209/534; US-4543969, 19851000, Rasmussen, 133/003.A; US-4544266, 19851000, Antes, 356/071; US-4547896, 19851000, Ohtombe et al., 382/007; US-4553222, 19851100, Kurland et al., 364/900; US-4553846, 19851100, Hilton et al., 356/429; US-4556140, 19851200, Okada, 194/004.C; US-4558224, 19851200, Gober, 250/460.1; US-4559451, 19851200, Curl, 250/560; US-4563771, 19860100, Gorgone et al., 382/007; US-4567370, 19860100, Falls, 250/461.1; US-4569421, 19860200, Sandstedt, 186/039; US-4582172, 19860400, Takeuchi et al., 186/038; US-4584529, 19860400, Aoyama, 324/261; US-4587412, 19860500, Apisdorf, 235/449; US-4587434, 19860500, Roes et al., 250/556; US-4590606, 19860500, Rohrer, 382/007; US-4592090, 19860500, Curl et al., 382/007; US-4593184, 19860600, Bryce, 223/544.9; US-4594644, 19860600, Painter et al., 361/417; US-4602332, 19860700, Hirose et al., 364/408; US-4605926, 19860800, Onishi et al., 340/825.3; US-4611345, 19860900, Ohnis