Block patterns as two-dimensional ruler

摘要: Disclosed is a two-dimensional pattern comprising plurality of R-planes each tiling corresponding R-ary block, being block radix R integer values, where for dimension the pattern, least common multiple sizes tiled blocks in that greater than size dimension, and any sub-block less occurs on regular grid with same periodicity as R-plane. The may be used determining position location captured an image by projecting onto scene. An captured. method determines from associated constructs, unique value values R-plane are to determine image.