Character two-dimensional barcode quick positioning method based on triangular locators
A two-dimensional barcode and triangular positioning technology, applied in electromagnetic radiation induction, instruments, induction record carriers, etc., can solve the problems of accelerating local threshold solution speed, uncertain pixel segmentation of critical points, etc., to achieve the effect of positioning
Active Publication Date: 2018-05-08
ZHEJIANG UNIV OF TECH
View PDF7 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] (2) A thresholding algorithm based on any global thresholding algorithm combined with a global threshold and a local threshold is used to solve the problem of uncertain pixel segmentation at critical points; and the integral image technology is introduced to accelerate the solution speed of the local threshold;
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0050] Embodiment: the character two-dimensional barcode fast location method based on triangular locator, comprises the following steps:
[0051] Step 1, first preprocessing the collected character two-dimensional barcode image, including image grayscale and filtering denoising, such as figure 1 shown.
[0052] Step 2: Propose a thresholding algorithm based on the combination of global threshold and local threshold based on any global thresholding algorithm to realize the segmentation of two-dimensional barcode images of characters, so as to solve the problem of uncertain pixel segmentation at critical points, such as figure 2 shown.
[0053] First, determine a grayscale interval
[0054] G={g|τ-δ≤g≤τ+δ}
[0055] The pixel points in the interval G are critical points, that is, there may be uncertainty whether these points are classified as foreground. For these points, a local thresholding method is used to determine them. The specific algorithm is as follows:
[0056]...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a character two-dimensional barcode quick positioning method based on triangular locators. A character two-dimensional barcode is composed of characters, the barcode does notcontain obvious edge information, and consequently the barcode cannot be extracted by use of fitting and other straight line detection modes. An isosceles right triangle has an obvious orientation feature, namely the orientation of the right angle, and meanwhile edge information of right-angle edges of the isosceles right triangle can provide a basis for division of a barcode region. Therefore, inthe character two-dimensional barcode, symbolized isosceles right triangles can be selected to serve as locators, and accordingly detection of the character barcode region can be converted into detection of the isosceles right triangles in an image. The character two-dimensional barcode quick positioning method based on the triangular locators is realized through a positioning algorithm of threeangular points of any triangle based on a distance between points and a graphic detection algorithm of the isosceles right triangles adaptive to distortion and degradation.
Description
technical field [0001] The invention relates to the field of computer graphics, in particular to a character two-dimensional barcode rapid positioning method based on triangular locators. Background technique [0002] The character two-dimensional barcode is different from the traditional graphic two-dimensional barcode. The character two-dimensional barcode stores the information in a character matrix after encoding, instead of forming the barcode information with geometric module graphics. Since the character two-dimensional barcode is encoded with text information, it can be Text information is used for transmission, which reduces transmission costs and improves transmission efficiency. [0003] Usually, the positioning method of the barcode area is realized by means of the positioning graphics of the barcode (such as the back-shaped mark of the QR code and the L-shaped mark of the DM code) and the edge features of the barcode. Since the character two-dimensional barcode...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/14
CPCG06K7/1417G06K7/1443G06K7/1452
Inventor 刘志姜帆鄢致雯陈波
Owner ZHEJIANG UNIV OF TECH