Analysis of moire patterns in non-uniformly sampled halftones

摘要

In this paper we analyze the moire patterns in halftone images scanned by a popular commercial scanner. We show that the non-uniform sampling scheme employed by the scanner introduce extra aliasing components compared to uniform sampling and thus complicates the moire patterns formed. The analysis applies to other scanners that employ non-uniforms sampling. We also suggest methods for suppressing the moire patterns in scanned halftones.