Directional wavelet approach to remove document image interference

In this paper, we propose a directional wavelet approachto remove images of interfering strokes coming from theback of a historical handwritten document due to seepingof ink during long period of storage. Our previous workrequired mapping of both sides of the document in orderto identify the interfering strokes to be eliminated. Perfectmapping, however, is difficult due to document skews,differing resolutions, non-availability of the reverseside and warped pages during scanning. The newapproach does not require double-sided mapping butinstead uses a directional wavelet transformto distinguish the foreground and reverse side strokes.Experiments have shown that the directional waveletoperation effectively removes the interfering strokes.