ADVANCED HOUGH-BASED ON-DEVICE DOCUMENT LOCALIZATION

ADVANCED HOUGH-BASED ON-DEVICE DOCUMENT LOCALIZATION

Advanced Hough-Based On-Device Document Localization. In an embodiment, lines are detected in an input image of a document. The lines are searched for candidate quadrilaterals. For at least a subset of the found candidate quadrilaterals, a contour score is calculated, and the candidate quadrilateral...

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Bibliographische Detailangaben
Hauptverfasser: ERSHOV, Aleksandr Mikhailovich, NIKOLAEV, Dmitry Petrovich, TROPIN, Daniil Vyacheslavovich, ARLAZAROV, Vladimir Viktorovich
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
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Beschreibung
Zusammenfassung:Advanced Hough-Based On-Device Document Localization. In an embodiment, lines are detected in an input image of a document. The lines are searched for candidate quadrilaterals. For at least a subset of the found candidate quadrilaterals, a contour score is calculated, and the candidate quadrilaterals are saved or discarded based on their contour scores. For each saved candidate quadrilateral, a contrast score is calculated. A final candidate quadrilateral is selected, based on the combined contour and contrast scores for the saved candidate quadrilaterals, to represent the borders of the document.