Positioning and extraction method for express waybill
An extraction method and a waybill technology, applied in the postal field, can solve problems such as addresses, recipients, barcode positions, typesetting differences, and increased difficulty
Active Publication Date: 2018-01-23
EAST CHINA NORMAL UNIV
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Problems solved by technology
[0003] However, according to the different needs of different logistics companies, the image forms of the express waybills formulated are different, and the location and typesetting of addresses, recipients, barcodes, etc. have a large degree of difference
In addition, there are other complex backgrounds such as complex table lines, patterns, and irrelevant text areas on the express waybill image, which also makes it more difficult to locate and extract relevant information in the express waybill
Method used
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[0069] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0070] The present invention locates and extracts express waybills by using a method based on graph representation and matching methods. figure 1 Shown is the flow chart of the method for locating and extracting express waybills based on graph representation and matching in the present invention, which is divided into four steps, which are respectively one: select key areas such as printed patterns or characters in the reference express waybill as reference positions, Carry out graph representation, including selection of key areas and graph representation; 2) Graphic representation of the candidate key areas obtained based on image segmentation to be processed express waybills, including selection of key areas, screening of key areas, and graph representation; 3) According to the graph Calculate the similarity between the pendi...
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The invention discloses a positioning and extraction method for an express waybill. The method comprises the steps of S1, selecting an existing printed pattern or a character key area on a reference express waybill as a reference position, for performing map representation; S2, representing the express waybill to be processed by a map based on a candidate key area acquired by image segmentation; S3, computing similarity between the express waybill to be processed and the reference express waybill according to attributes of the maps to match the maps, determining position mapping of the reference express waybill to the express waybill to be processed, to achieve positioning of an area a user is interested in on the express waybill to be processed; and S4, performing postprocessing operationsuch as image rotation, segmentation, repositioning of character blocks according to a positioning result of related information, to complete extraction of information such as a name of a receiver, aphone number and a delivery address the user is interested in on the express waybill.
Description
technical field [0001] The invention belongs to the technical field of postal services, and relates to a method for locating and extracting express waybills represented by graphs and matched. Background technique [0002] The destination information area in the express waybill, such as the logo of the logistics company, barcode, QR code, name of the recipient, name of the sender, phone number, zip code, etc., contains a wealth of logistics information. Only by identifying these information can the package, The letter was sent to the correct destination. Automatically locate the position of relevant information in the express waybill, which is beneficial to remove the interference of complex background information of the express waybill, quickly locate and identify the information in the relevant area, so as to realize the correct sorting of parcels and letters. [0003] However, according to the different needs of different logistics companies, the image forms of the expres...
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Inventor 吕岳谭婷吕淑静许紫燕
Owner EAST CHINA NORMAL UNIV