DM code positioning method and device based on geometric positioning
A technology of geometric positioning and code positioning, applied in the field of DM code positioning method and device based on geometric positioning, can solve the problem of high image quality requirements, and achieve the effect of low quality requirements, good positioning, and low contrast
Inactive Publication Date: 2019-03-19
BEIJING LUSTER LIGHTTECH
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[0006] The purpose of this application is to provide a DM code positioning method and device based on geometric positioning to solve the problem of high image quality requirements in existing industrial production lines
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no. 1 example
[0053] refer to figure 2 , the present application provides a first embodiment of a DM code positioning method based on geometric positioning, including:
[0054] Step S11, inputting the image of the code to be read;
[0055] Step S12, load the training model, and determine the geometric positioning feature information of the DM code according to the training model;
[0056] Step S13, according to the geometric positioning feature information of the DM code, use a geometric positioning tool to roughly position the image of the code to be read, and obtain a DM code candidate area;
[0057] It should be noted that before using the geometric positioning tool for rough positioning, it is necessary to determine the search parameters of the geometric tool.
[0058] In this application, the possible area is given by traversal search. Since this application needs to realize the DM code positioning within the rotation range of -180 ~ +180, the search parameters set in this application...
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The invention discloses a DM code positioning method and device based on geometric positioning. The method comprises the steps of inputting an image of a to-be-read code; loading a training model, anddetermining geometric positioning feature information of the DM code according to the training model; according to the geometric positioning feature information of the DM code, a geometric positioning tool is utilized to roughly position the image of the to-be-read code, and a DM code alternative area is obtained; accurately positioning the DM code alternative region by adopting a straight line fitting method; and filtering out a non-DM code region in the DM code alternative region. The geometric feature positioning method is mainly related to the mode edge information of the DM code, and a mode similar to the mode edge information is difficult to form for the interference of data and an edge area, so that the interference on the positioning is difficult to generate. The DM code positioning method based on geometric positioning is used, the DM code position of the same specification can be detected, the quality requirement for codes is not high, the DM code area with low contrast andnoise interference can be better positioned, and the method is insensitive to interference or partial deletion of the data area, the L mode edge and the clock edge.
Description
technical field [0001] The present application relates to the technical field of image processing and recognition, in particular to a DM code positioning method and device based on geometric positioning. Background technique [0002] DataMatrix code (DM code) recognition is an important application in machine learning, and its biggest feature is small size and large amount of stored information. In addition, the Data Matrix code adopts complex error correction technology, which makes it have super anti-interference ability. Therefore, it is especially suitable for small parts identification, or directly printed on the entity, for example, printed on the components of the circuit board, as information identification on the parts of the mobile phone, etc. [0003] The DM code is a two-dimensional matrix image, and the composition of the DM code is as follows: figure 1 As shown, it includes "L" mode side 1, clock mode side 2, data area 3 and quiet area 4. The data area 3 is ...
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IPC IPC(8): G06K7/14
CPCG06K7/1417G06K7/1443
Inventor 杨建乔姚毅
Owner BEIJING LUSTER LIGHTTECH