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Method and device for evaluating tolerance quality of negotiable securities

A technology for marketable securities and quality evaluation, applied in the measurement of color/spectral characteristics, image analysis, instruments, etc., can solve problems such as differences in detection and evaluation results, inability to guarantee the consistency and reliability of evaluation results, and quantitative numerical representation of evaluation results. , to achieve good technical results, automatic measurement, accurate physical and chemical resistance and quality

Active Publication Date: 2013-10-09
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many disadvantages in the quality evaluation method of artificial physical and chemical resistance, which are specifically manifested in: (1) Different inspectors have different understanding and mastery of the evaluation criteria, resulting in differences in the evaluation results of the same sample to be tested; (2) Due to physiological, psychological, environmental Influenced by other factors, the results of the evaluation by the same inspector at different times will also be different; (3) The inspectors can only make excellent, good, medium, poor, and good grades for the sample to be tested based on the standard sample and their subjective understanding of the standard. Inferior classification evaluation, unable to express the evaluation results with quantitative values; (4) The evaluation method is cumbersome, low in efficiency, not strong in repeatability, and the workload of the operators is heavy, so the consistency and reliability of the evaluation results cannot be guaranteed

Method used

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  • Method and device for evaluating tolerance quality of negotiable securities
  • Method and device for evaluating tolerance quality of negotiable securities
  • Method and device for evaluating tolerance quality of negotiable securities

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0056] An apparatus for evaluating the durability and quality of securities in this embodiment adopts a customized motion control platform 3 , a high-resolution digital camera 1 and a multi-channel LED surface light source 4 as an image acquisition platform, as shown in FIG. 1 .

[0057] The motion control platform 3 has a two-dimensional movement function that can be precisely positioned. The system platform uses two high-precision stepping motors to control the motion in the X direction and the Y direction respectively. The two motors are controlled by the serial port command to drive the banknotes to move in two dimensions, and the coordinate information is returned at the same time.

[0058] In order to ensure the smoothness of the ticket surface when collecting securities images, a set of fixture 2 is specially designed to fix and flatten the ticket sample. figure 2 shown. The fixture is composed of upper and lower layers of high transmittance glass, and the surface of ...

Embodiment 2

[0071] It is difficult to completely extract inks with similar colors through a single definition of HSV. Therefore, a template matching algorithm is added. According to the actual situation that the positions of all patterns cannot be guaranteed to be consistent during the printing of securities, a method combining HSV color definition and template matching is adopted. All inks are extracted accurately. After the image preprocessing is completed, the template matching operation is performed, and the specific process is as follows.

[0072] The first step is to select the template matching feature area from the banknote. For example, for the banknote on the back of the pound 20 bill, select the left portrait area as the template image, such as Figure 8 shown.

[0073] In the second step, template matching is performed on the selected feature regions respectively to locate the position of the feature regions. Taking the portrait area on the left as an example, the template m...

Embodiment 3

[0082] Since the fluorescent pattern in the banknote will also have obvious changes before and after physicochemical, the fluorescent component can also be graded for durability quality. In order to obtain fluorescence images, the system uses a multi-channel light source 4 including an ultraviolet light source and a white light source, which can be switched and controlled by the host computer software. When the ultraviolet light source is turned on, the fluorescence patterns before and after the physicochemical can be easily collected, as shown in Figure 11. , the resistance quality can be evaluated by calculating the average brightness difference of the fluorescent pattern. The remaining steps and devices are the same as in Example 1.

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Abstract

The invention relates to a method and a device for evaluating tolerance quality of negotiable securities and belongs to the field of anti-counterfeit detection of negotiable securities. The method comprises the following steps of before and after materialization, carrying out detection sample image acquisition, carrying out HSV color space ink-color extraction and rating, and carrying out tolerance detection result rating, and is characterized in that the acquired detection sample images are defined by a HSV color space; according to an appointed ink-color HSV color range, an ink color is extracted from the acquired detection sample images; and a HSV spatial component change degree before and after materialization is calculated and according to the calculation result, a rating process is carried out and through the whole ink-color rating, a tolerance detection result is obtained. The method and the device realize accurate and objective evaluation of tolerance quality of negotiable securities, realize automatic measurement of tolerance quality of negotiable securities, produce a complete measurement result report, and have good technical effects.

Description

technical field [0001] The invention relates to a method and device for evaluating the durability quality of securities, belonging to the field of anti-counterfeiting detection of securities. Background technique [0002] The physical and chemical resistance quality of negotiable securities, especially banknotes, in the circulation process is an important indicator for evaluating their overall quality. A certain degree of resistance quality, conventional resistance tests include acid resistance (sulfuric acid), alkali resistance (sodium hydroxide), sodium hypochlorite resistance, soap resistance, hot water resistance, ethanol resistance, ethyl acetate resistance, perchloroethylene resistance, gasoline resistance, resistance to Wrinkle resistance, washing resistance, toluene resistance, acetone resistance, light resistance, abrasion resistance, dirt resistance, hot flash resistance, wet wrinkle resistance, etc. [0003] At present, there is no special equipment and method fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G06T7/00
Inventor 卢继兵张健杜旭东秦庆旺邬立勇王建鑫刘慧娜刘李泉韩英魁张渠冯治国
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD