Two-Dimensional Wavelet Transform in Document Analysis

摘要

In this paper, a novel wavelet-based method will be presented. In this method, two-dimensional multires-olution analysis (MSA), wavelet decomposition algorithm, and compactly supported orthonormal wavelets are used to transform a document image into sub-images. Based on these sub-images, the reference lines of a grey-level document can be extracted, and knowledge about the geometric structure of the document can be acquired. Particularly, this approach appears to be more efficient in processing form documents with multi-grey level background.