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Method and device for acquiring DM code area

An acquisition method and acquisition device technology, applied in the field of acquisition of DM code areas, can solve the problems of missing effective areas, inaccurate positioning, including invalid areas, etc., and achieve the effect of precise positioning and improved accuracy

Pending Publication Date: 2020-12-11
BEIJING LUSTER LIGHTTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of including invalid areas, missing valid areas, and inaccurate positioning in the process of acquiring DM code image areas, this application provides a method and device for acquiring DM code areas

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  • Method and device for acquiring DM code area
  • Method and device for acquiring DM code area
  • Method and device for acquiring DM code area

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Reference throughout this specification to "a number of embodiments," "some embodiments," "one embodiment," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one Examples. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in at least one other embodiment," or "in an embodiment," etc. throughout this specification do not neces...

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Abstract

The invention relates to the technical field of image processing and recognition, and in particular, relates to a method and device for obtaining a DM code area. The problems of invalid regions, missing of valid regions and inaccurate positioning in the process of acquiring the DM code area can be solved to a certain extent. The method comprises the steps: obtaining the module side length of a DMcode; based on the module side length, setting a first clock side projection area at the far end of a first L side, and setting a second clock side projection area at the far end of a second L side; performing ray projection at different angles in the first clock side projection area and the second clock side projection area respectively, and taking the ray with the maximum sum of pixel gray values as the ray where the first clock side is located and the ray where the second clock side is located; and constructing a quadrangle based on the ray where the first clock edge is located, the ray where the second clock edge is located, the first L edge and the second L edge to obtain a quadrangle DM code area.

Description

technical field [0001] The present application relates to the technical field of image processing and recognition, in particular to a method and device for acquiring a DM code area. Background technique [0002] DM (Data Matrix: Data Matrix) code is a matrix two-dimensional barcode, which has the characteristics of high density, small size and strong error correction ability, and DM code has become the mainstream technology used in industrial two-dimensional barcodes. Before extracting and decoding the DM code signal, it is necessary to determine the area of ​​the DM code. [0003] In the acquisition and implementation of some DM code areas, firstly, the fixed L side of the DM code is determined by detecting straight lines such as Hough (Hough transform), or LSD (Line SegmentDetector: straight line segment detection algorithm); and then the fixed L side is obtained according to the fixed L side Its minimum circumscribed affine rectangle is used as the DM code area. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/14
CPCG06K7/1417G06K7/1443
Inventor 闫利那
Owner BEIJING LUSTER LIGHTTECH
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