Extraction method of value-added tax invoice layout based on computer vision technology
A technology of computer vision and extraction method, which is applied in the direction of computer parts, calculation, character and pattern recognition, etc. It can solve the problems of relying on manual collection of invoices, low error and other problems, and achieve precise graphic range, improved efficiency, improved positioning and The effect of extraction accuracy
Active Publication Date: 2022-06-28
SICHUAN UNIV
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[0004] The technical problem to be solved by the present invention is to provide a method for extracting the layout of value-added tax invoices based on computer vision technology, so as to solve the problem that the input of a large number of invoices in the current financial system relies on manual collection, which leads to low efficiency and frequent errors
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[0043] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
[0044] Aiming at the digital image of the VAT invoice obtained by the digital scanner, the invention uses the invoice layout recognition software to form a layout extraction interface. The layout analysis software runs in the background without a human-computer interface. The software detects the directory output by the scanner in the background. When a new unrecognized jpg file appears, it analyzes and processes it, and moves the file to the directory marked as analysis completed. All processing can be performed automatically in the background of the system, providing a valuable technical basis for automatic identification of invoice content.
[0045] The invention aims at locating and extracting the face area of the VAT invoice from the scanned digital image of the invoice and retrieving the sub-image area of a specific item. Ad...
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The invention discloses a method for extracting a value-added tax invoice layout based on computer vision technology. Then traverse the straight line segment set to find the adjacent straight line segment pair, calculate the intersection point to construct the intersection point set, then use the DB-SCAN algorithm to cluster the intersection point set to obtain the cluster center, and finally calculate the minimum area circumscribing rectangle of the cluster center as the wireframe match The initial state of , update the matching parameters, and achieve accurate extraction. The present invention improves the robustness of face analysis of value-added tax invoices, and at the same time reduces the workload of financial personnel, supports the further improvement of the intelligence level of information entry in the financial bill system, and is conducive to breaking through the boundaries between paper invoices and electronic taxation, and realizing Promotion of intelligent invoice recognition technology.
Description
technical field [0001] The invention relates to the field of automatic processing of invoice images, in particular to a method for extracting layout of VAT invoices based on computer vision technology. Background technique [0002] Invoices refer to the business vouchers issued and received by all units and individuals in purchasing and selling commodities, providing or receiving services, and engaging in other business activities. They are the original basis for accounting and an important basis for law enforcement inspections by auditing authorities and tax authorities. The Chinese accounting system stipulates that valid invoices for purchasing products or services are called tax invoices. The vouchers of government departments' fees and levies are called differently in different periods and different charging and levy items, but they are generally referred to as receipts for administrative charges. For internal auditing and auditing, each invoice must have a unique runni...
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IPC IPC(8): G06V30/40G06V10/28G06V10/30G06V10/44
CPCG06V30/40G06V10/28G06V10/30G06V10/457G06V10/44
Inventor 王俊峰唐鹏高琳李征
Owner SICHUAN UNIV