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公开(公告)号：US20210110194A1
公开(公告)日：2021-04-15
申请号：US16997242
申请日：2020-08-19
发明人： Jinliang Yao , Yuelun Yu , Chuang Hu
摘要： A method for automatic extraction of data from a graph, including text area locating and text box classification; locating of coordinate axes, and locating of the positions of hatch marks on the coordinate axes; legend locating and information extraction; extracting corresponding bar or polyline connected components according to legend color, and filtering and classification; determining key points on the X-axis and locating a corresponding X-axis label for each key point; locating key points of the bars and polyline according to the X-axis key points, determining labeled numerical text boxes that correspond to the key points, and identifying the numerical text; calculating a corresponding value for each pixel, and estimating corresponding values of the key points of the bars or polyline; determining a final result according to a difference between the estimated values and the recognized labeled values.
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公开(公告)号：US11335081B2
公开(公告)日：2022-05-17
申请号：US16997242
申请日：2020-08-19
发明人： Jinliang Yao , Yuelun Yu , Chuang Hu
IPC分类号： G06V30/00 , G06V10/426 , G06V10/22 , G06V10/28 , G06V10/30 , G06V10/56 , G06V10/44 , G06V30/413 , G06V30/414 , G06V30/10
摘要： A method for automatic extraction of data from a graph, including text area locating and text box classification; locating of coordinate axes, and locating of the positions of hatch marks on the coordinate axes; legend locating and information extraction; extracting corresponding bar or polyline connected components according to legend color, and filtering and classification; determining key points on the X-axis and locating a corresponding X-axis label for each key point; locating key points of the bars and polyline according to the X-axis key points, determining labeled numerical text boxes that correspond to the key points, and identifying the numerical text; calculating a corresponding value for each pixel, and estimating corresponding values of the key points of the bars or polyline; determining a final result according to a difference between the estimated values and the recognized labeled values.
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