Plan of the presentation Content based image retrieval



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tarix26.10.2017
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Plan of the presentation



Content based image retrieval



Similarity measures



Indexing using Text



Video properties



Text extraction: general scheme



Detection in single frames



Detection in single frames: examples



A filter for text detection



Mathematical morphology



Detection in video sequences



Integration of the rectangles  occurrences



Suppression of false alarms: Examples



Image enhancement



Interpolation: Examples



Interpolation: thresholded examples



Binarisation



Binarisation methods



Binarisation by Niblack



Binarisation by Niblack: Problems



Binarisation: Improvement by Sauvola



Binarisation by Sauvola, examples



Improvement: Adaptive dynamic range



Improvement: Shift of the image range



Improvement: Shift of the image range



Fast incremental calculation



The experiments



Test videos





Video example - France Télécom



The interface to the OCR software



OCR Page - Manual



OCR Output



Post processing of OCR output



Automatic evaluation using markers





OCR Evaluation



OCR Evaluation: Wagner & Fischer



Detection results - INA Videos



Binarisation methods: Examples



Binarisation methods: Examples



OCR Results - Classification by binarisation method



OCR Results: Interpolation methods



Conclusion



Outlook




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