Method and device for testing resolution ratios of fingerprint acquisition equipment

A fingerprint collection and resolution technology, applied in the field of image processing, can solve the problems of low accuracy and laborious manual judgment.

Active Publication Date: 2018-01-12
CHINA ELECTRONICS STANDARDIZATION INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The embodiment of the present invention provides a method for testing the resolution of a fingerprint collection device to solve the technical problems of laborious and low accuracy of manual judgment in the prior art

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  • Method and device for testing resolution ratios of fingerprint acquisition equipment
  • Method and device for testing resolution ratios of fingerprint acquisition equipment
  • Method and device for testing resolution ratios of fingerprint acquisition equipment

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0035] In an embodiment of the present invention, a method for testing the resolution of a fingerprint collection device is provided, such as Figure 4 As shown, the method includes:

[0036] Step 401: Obtain the image of the optical test card collected by the fingerprint collection device to be tested, the stripes of the image are divided into four quadrants, the stripes of the I quadrant and the II quadrant are used to test the first resolution, the III quadrant and the third quadrant The stripes in quadrant IV are used to test the second resolution;

[0037] Step 402: collect a preset numb...

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Abstract

Embodiments of the invention provide a method and device for testing resolution ratios of fingerprint acquisition equipment. The method comprises the following steps of: obtaining an image of an optical test card acquired by to-be-tested fingerprint acquisition equipment and dividing stripes of the image into four quadrants, wherein the stripes of the first quadrant and the second quadrant are used for testing a first resolution ratio and the stripes of the third quadrant and the fourth quadrant are used for testing a second resolution ratio; respectively acquiring a preset number of first image features in the first quadrant and the second quadrant in the image, inputting the acquired first image features into a first classifier, and outputting a result by the first classifier to expresswhether a resolution ratio of the to-be-tested fingerprint acquisition equipment satisfies the first resolution ratio or not; and respectively acquiring a preset number of second image features in thethird quadrant and the fourth quadrant in the image, inputting the acquired second image features into a second classifier, and outputting a result by the second classifier to express whether the resolution ratio of the to-be-tested fingerprint acquisition equipment satisfies the second resolution ratio or not.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for testing the resolution of a fingerprint collection device. Background technique [0002] Common optical fingerprint devices have a resolution of 500DPI and 1000DPI, etc. In reality, some occasions (such as production plants and quality inspection agencies) need to check whether the fingerprint collection device meets the requirements of a specific resolution. At present, it is generally judged by manual observation. The imaging of a special standard test card on the fingerprint collection device is manually observed (such as figure 1 , 2 , 3) to determine whether the fingerprint collection device satisfies a specific resolution. [0003] At present, manual judgment is to observe the clarity of the black and white stripes in each quadrant of the image, or whether the horizontal or vertical stripes can be seen clearly. figure 1 ( figure 1 There ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 胡静宜王文峰曹国顺宋继伟霍红文秦日臻高健夏娣娜孔勇
Owner CHINA ELECTRONICS STANDARDIZATION INST
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