Document Recognition and Retrieval

agrep algorithm applied approach automatic bounding boxes cell character images character recognition classifier clustering column compression computed connected components contains correction marks corresponding database DCell decoding described detection digits dimensionality reduction Document Analysis document image document objects Document Recognition edge edit distance elements entity evaluation example extraction feature feature extraction Figure font form documents graph graphics ground truth halftone headers horizontal Hough transform IEEE input Jiangying Zhou Keywords language model layout Lopresti matching areas merging method n-gram nodes noise optical character recognition output Pattern Recognition performance pixels problem Proc quantization query reading order Recognition and Retrieval recognition rate rectangles region regular expression rules sample scanned score Section segmentation selected skew string structure TArea techniques template text block text line threshold TLinks union-find vector vertical Viterbi wavelet zone