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Precise positioning and extraction of lines in image of line tool traces

A technology of tool traces and precise positioning, which is applied in the directions of instruments, calculations, characters and pattern recognition, etc., to achieve the effects of fast precise positioning and extraction methods, overcoming instability and low reliability, and reducing costs

Inactive Publication Date: 2019-03-08
广东警官学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides a method for precise positioning and extraction of lines in line tool trace images, overcomes the defects existing in the current method of manually comparing and inspecting tool traces, and can quickly and accurately locate and extract lines

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  • Precise positioning and extraction of lines in image of line tool traces
  • Precise positioning and extraction of lines in image of line tool traces
  • Precise positioning and extraction of lines in image of line tool traces

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Embodiment Construction

[0029] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

[0030] like figure 1 As shown, the method for precise positioning and extraction of lines in a line tool trace image includes the following steps:

[0031] S1. Input line tool trace image;

[0032] S2. Determine the comparison line;

[0033] S3. Calculate and compare the line trace grayscale projection on the line;

[0034] S4. Calculation of the second order derivative of the edg...

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Abstract

The invention relates to the technical field of an automatic comparison method for criminal line tool traces, and more specifically, to a method for accurately locating and extracting lines in an image of line tool traces. A method for precise positioning and extraction of lines in a line tool trace image, including the following steps: S1. Input the line tool trace image; S2. Determine the comparison line; S3. Calculate the grayscale projection of the line traces on the comparison line; S4. Edge two Order derivative calculation; S5. Line area calculation; S6. Line optimization and line center position calculation; S7. Line extraction. In the present invention, compared with the prior art, the precise positioning and extraction method of the lines in the line tool trace image of the present invention is reasonable and efficient, and can quickly and accurately locate the position of the lines in the two-dimensional image of the line tool traces and extract the lines, which is a tool trace computer Automatic comparison lays the foundation to reduce the impact of manual comparison on human factors.

Description

technical field [0001] The invention relates to the technical field of an automatic comparison method for criminal line tool traces, and more specifically, to a method for accurately locating and extracting lines in an image of line tool traces. Background technique [0002] The comparative inspection of traces of criminal tools is a difficult problem in the field of trace inspection and identification. Line tool traces are the most typical type of tool traces. At present, the comparison and inspection of line tool traces all rely on manual comparison, which is labor-intensive and lacks stability and reliability. Studying the automatic comparison technology of line tool traces can reduce the labor intensity of manual comparison, enhance the stability and reliability of inspection comparisons, and make it possible to compare and determine evidence or retrieve accurate serialization cases from massive tool trace databases. The rapid and accurate positioning and extraction of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46
CPCG06V10/44
Inventor 牟丽杨敏
Owner 广东警官学院
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