1. Robust page segmentation based on smearing and error correction unifying top-down and bottom-up approaches;Cao,2007
2. Retrieval of Document images using layout knowledge;Hermann,1993
3. Document image matching and retrieval with multiple distortion-invariant descriptors;Hull,1994
4. Geometric hashing: A general and efficient model-based recognition scheme;Lamdan,1988
5. Camera-based analysis of text and documents: a survey;Liang;Intl. J. Doc. Anal. Recognit.,2005