Unlock instant, AI-driven research and patent intelligence for your innovation.

Resolution test method, device and system for iris acquisition equipment

A technology of iris collection and testing method, which is applied in the direction of instruments, character and pattern recognition, acquisition/identification of eyes, etc. It can solve the problems of unstable MTF value and lack of comparability, etc., and achieve the effect of stable and reproducible test results

Pending Publication Date: 2021-03-26
CHINA ELECTRONICS STANDARDIZATION INST +2
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the first aspect, the embodiment of the present invention provides a method for testing the resolution of an iris collection device, which solves the problem that in the prior art, the tester artificially marks the area, the subjective factor causes the calculated MTF value to be unstable, and the difference between multiple test results Technical issues of lack of comparability

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Resolution test method, device and system for iris acquisition equipment
  • Resolution test method, device and system for iris acquisition equipment
  • Resolution test method, device and system for iris acquisition equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] In an embodiment of the present invention, a device resolution test card is proposed, and the device resolution test card includes: a frame, the frame is used to frame an effective target area; the effective target area includes a first area, a second area And the third area, the first area is a blank area, the second area and the third area include black and white lines; the first area includes the center point CL, which is used for the ce...

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

No PUM Login to View More

Abstract

The invention provides a resolution test method, device and system for iris acquisition equipment. The method comprises the following steps: receiving an image of an equipment resolution test card acquired by iris acquisition equipment to be tested; and detecting preset marks in the image, detecting preset mark outer frames when the number of the detected preset marks meets a preset requirement, determining a measurement area based on a detection result of the outer frames, and calculating the resolution of the iris acquisition equipment to be tested through the measurement area. According tothe scheme, manual marking of a test area in a traditional method is avoided, subjective influences are eliminated, and a stable reproducible test result can be obtained.

Description

technical field [0001] The invention relates to the technical field of biological feature identification, in particular to a method, device and system for testing the resolution of an iris collection device. Background technique [0002] The resolution of iris acquisition equipment refers to the ability of the equipment to distinguish fine stripes, that is, the ability to distinguish black and white line pairs, referred to as MTF, which has a crucial impact on the quality of iris texture imaging. At present, the test method standard ISO 12233-2014 for camera resolution has been released internationally. The resolution test method for existing iris collection equipment adopts the test card specified in ISO 12233-2014. The equipment collects the test card image and transmits it to the computer. The analysis software displays the collected images, and the tester manually marks a black and white rectangular area in the image, and the software calculates the MTF value. And adopt...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/19
Inventor 王文峰宋继伟钟陈宋敏刘炳顺杨扬赵倩何召锋李星光周水子
Owner CHINA ELECTRONICS STANDARDIZATION INST