Stippled DPM two-dimensional code area positioning method

A technology of area positioning and two-dimensional codes, which is applied in image data processing, record carriers used by machines, instruments, etc., to achieve the effect of improving accuracy and reducing production costs

Inactive Publication Date: 2015-09-16
TIANJIN UNIV
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Problems solved by technology

At present, few researchers locate the stippling DPM QR code area from the perspective of superpixel segmentation

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  • Stippled DPM two-dimensional code area positioning method
  • Stippled DPM two-dimensional code area positioning method
  • Stippled DPM two-dimensional code area positioning method

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Embodiment Construction

[0043] The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the described specific embodiments are only to illustrate the present invention, and are not intended to limit the present invention.

[0044] In order to solve the problems such as the difficulty in segmenting the basic unit of the stippled DPM two-dimensional code and the inaccurate positioning of the region, the embodiment of the present invention provides [2] (The definition of superpixel was first proposed by Ren in 2003. It refers to the locally connected image area composed of adjacent pixels with similar texture, color, grayscale and other characteristics in the image. Most of these areas still retain further image The effective information of the segmentation will not destroy the edge information of the object to be recognized in the image. It gathers pixels with similar characteristics in the imag...

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Abstract

The invention discloses a stippled DPM two-dimensional code area positioning method. The method comprises the steps that gray processing is carried out on an acquired image with a stippled DPM two-dimensional code to acquire a grayscale image; affinity propagation clustering ideology is used to realize automatic clustering to acquire a super pixel area; edge confidence is introduced to adjust a super pixel edge, so as to form an adaptive edge simple linear iterative clustering (AE-SLIC) algorithm; super pixels are used as the vertex of a spectral clustering central image for secondary clustering; and the super pixels in a DPM area are clustered due to high similarity, thus accurately positioning stippled DPM area is completed. After experimental testing and analysis, a super pixel segmentation result acquired in the invention is better than a common super pixel segmentation algorithm in terms of completeness, computational complexity and the like. Compared with a traditional positioning algorithm based on pixel operation, the method provided by the invention has the advantages of good instantaneity, accurate positioning and good robustness.

Description

technical field [0001] The invention relates to the field of positioning, in particular to a dot-cut type DPM two-dimensional code area positioning method with complex background, uneven illumination and low contrast. Background technique [0002] Direct Part Mark (Direct Part Mark, DPM) [1] It was initially applied to parts in the mechanical and electronic industry, that is, by means of laser dot etching and other means, the rich information of parts from production, quality inspection, and delivery to the factory can be recorded in one image. Then it expanded to the fields of automobile manufacturing, pharmaceutical medical treatment, military firearms management, etc., and it has a tendency to be promoted to other industries. DPM QR code is the most popular type of important information source in IoT technology. [0003] Since the DPM two-dimensional code is mostly used in metal, cast iron, wood, glass and other materials, it needs to be dotted by means of laser dot eng...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00G06K19/06
Inventor 王萍王娟王港
Owner TIANJIN UNIV
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