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Method of authenticating a printed document
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Document image compression method and its application in document authentication
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Topology-preserving downsampling of binary images
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Robust decoding of color barcode printed with extremely small data cells
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Document image binarization and segmentation using image phase congruency
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US2013329965A1
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Method and system for document authentication using Krawtchouk decomposition of image patches for image comparison
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US2013170749A1
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Method and apparatus for document image indexing and retrieval using multi-level document image structure and local features
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US2013161395A1
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Four dimensional (4D) color barcode for high capacity data encoding and decoding
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US2012127422A1
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Automatic accommodative spectacles using a scene analyzer and focusing elements
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US2011043864A1
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Deblurring and supervised adaptive thresholding for print-and-scan document image evaluation
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US2011121066A1
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Document authentication using hierarchical barcode stamps to detect alterations of barcode
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