%0 Conference Paper %1 4378733 %A Llados, J. %A Sanchez, G. %B Ninth International Conference on Document Analysis and Recognition (ICDAR 2007) %D 2007 %K documents historicaldocuments indexing %P 362-366 %R 10.1109/ICDAR.2007.4378733 %T Indexing Historical Documents by Word Shape Signatures %U http://ieeexplore.ieee.org/abstract/document/4378733 %V 1 %X In this paper a word spotting approach to index archival image documents is presented. Indices are constructed from keyword images. The spotting strategy is formulated on an indexing-by-shape basis. The well known shape context descriptor is used to compute word image signatures from the skeleton points. Afterwards, codewords are extracted from thresholded shape contexts. It is a simpler and more compact representation based on bit vectors. Document images are roughly segmented into words and a lookup table is constructed. Each word subimage is taken as a bin. Keyword images are spotted into documents by a voting strategy consisting in indexing into the lookup table by codewords, and voting into the corresponding bins. The approach is illustrated by a real application scenario consisting of documents from a digital archive of the Spanish Civil War.

@inproceedings{4378733, abstract = {In this paper a word spotting approach to index archival image documents is presented. Indices are constructed from keyword images. The spotting strategy is formulated on an indexing-by-shape basis. The well known shape context descriptor is used to compute word image signatures from the skeleton points. Afterwards, codewords are extracted from thresholded shape contexts. It is a simpler and more compact representation based on bit vectors. Document images are roughly segmented into words and a lookup table is constructed. Each word subimage is taken as a bin. Keyword images are spotted into documents by a voting strategy consisting in indexing into the lookup table by codewords, and voting into the corresponding bins. The approach is illustrated by a real application scenario consisting of documents from a digital archive of the Spanish Civil War.}, added-at = {2022-04-06T23:04:49.000+0200}, author = {Llados, J. and Sanchez, G.}, biburl = {https://www.bibsonomy.org/bibtex/2161aa30dc76c4a9f5f79f6d75b3ef7ea/petarkonig}, booktitle = {Ninth International Conference on Document Analysis and Recognition (ICDAR 2007)}, doi = {10.1109/ICDAR.2007.4378733}, interhash = {806e3791a5efe3f0112b2304097cafe1}, intrahash = {161aa30dc76c4a9f5f79f6d75b3ef7ea}, issn = {2379-2140}, keywords = {documents historicaldocuments indexing}, month = {Sep.}, pages = {362-366}, timestamp = {2022-04-06T23:04:49.000+0200}, title = {Indexing Historical Documents by Word Shape Signatures}, url = {http://ieeexplore.ieee.org/abstract/document/4378733}, volume = 1, year = 2007 }