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PAMI
1998

Spatial Sampling of Printed Patterns

13 years 10 months ago
Spatial Sampling of Printed Patterns
—The bitmap obtained by scanning a printed pattern depends on the exact location of the scanning grid relative to the pattern. We consider ideal sampling with a regular lattice of delta functions. The displacement of the lattice relative to the pattern is random and obeys a uniform probability density function defined over a unit cell of the lattice. Random-phase sampling affects the edge-pixels of sampled patterns. The resulting number of distinct bitmaps and their relative frequencies can be predicted from a mapping of the original pattern boundary to the unit cell (called a modulo-grid diagram). The theory is supported by both simulated and experimental results. The modulo-grid diagram may be useful in helping to understand the effects of edge-pixel variation on Optical Character Recognition.
Prateek Sarkar, George Nagy, Jiangying Zhou, Danie
Added 23 Dec 2010
Updated 23 Dec 2010
Type Journal
Year 1998
Where PAMI
Authors Prateek Sarkar, George Nagy, Jiangying Zhou, Daniel P. Lopresti
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