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Handwritten document image database construction and retrieval system 430702
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2DWP-LDB algorithm applied approach automatic bounding boxes cell character images character recognition classifier clustering color column compression computation connected component analysis connected components correction marks corresponding database decoding detection dictionary digits disc model Document Analysis document image Document Recognition edge edit distance elements error evaluation example extraction feature extraction feature vectors form documents function graph graphics grayscale ground truth halftone headers horizontal Hough transform IEEE input Jiangying Zhou labels language model layout Lopresti matching areas method nodes noise OCR word optical character recognition output paper Pattern Recognition performance pixels problem pyramid quantization reading order Recognition and Retrieval recognition rate rectangles Retrieval VIII rules sample scanned score Section segmentation selected skew spatial statistical step string structure substitution matrix symbol techniques template text block text line threshold union-find vertical Viterbi wavelet word group zone