发明名称 |
SYSTEMS AND METHODS FOR DETECTION AND HIGH-QUALITY CAPTURE OF DOCUMENTS ON A CLUTTERED TABLETOP WITH AN AUTOMATICALLY CONTROLLED CAMERA |
摘要 |
Described are systems and methods for recognizing paper documents on a tabletop using an overhead camera mounted on pan-tilt servos. The described automated system first finds paper documents on a cluttered desk based on a text probability map, constructed using multiple images acquired at fixed grid positions, and then captures a sequence of high-resolution overlapping frames of the located document(s), which are then fused together and perspective-rectified, using computed homography, to reconstruct a high quality and fronto-parallel document image that is of sufficient quality required for optical character recognition. The extracted textual information may be used, for example, for indexing and search, document repository and/or language translation applications. |
申请公布号 |
US2016259971(A1) |
申请公布日期 |
2016.09.08 |
申请号 |
US201514637391 |
申请日期 |
2015.03.03 |
申请人 |
FUJI XEROX CO., LTD. |
发明人 |
Kim Chelhwon;Chiu Patrick;Tang Hao |
分类号 |
G06K9/00;G06K9/18;G06K9/46;G06T5/50;H04N5/232;G06T7/00 |
主分类号 |
G06K9/00 |
代理机构 |
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代理人 |
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主权项 |
1. A computer-implemented method being performed in a computerized system comprising a processing unit, a memory and a camera, the camera being mounted on a turret operatively coupled to the processing unit, the computer-implemented method comprising:
a. scanning a surface with the camera to acquire a first plurality of images of the surface; b. using the acquired first plurality of images of the surface to determine at least one location of a text on the surface; c. capturing a second plurality of images using the camera based on the determined location of the text on the surface; and d. extracting the text using the second captured plurality of images. |
地址 |
Tokyo JP |