Iris image definition evaluation method and device
A definition evaluation and iris image technology, which is applied in the field of image processing, can solve the problems of noise influence and insufficient resolution of definition, and achieve the effect of improving speed and accuracy, fast and effective definition evaluation, and high accuracy
Pending Publication Date: 2020-07-31
北京万里红科技有限公司
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, there are many methods for evaluating the clarity of iris images. Due to the influence of noise such as glasses, light spots, and eyelashes in the iris image, many evaluation methods are seriously affected by noise in the actual use process, and the degree of clarity is not enough in the evaluation process. High, there are still some problems
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 Construction
[0052] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0053] At present, some iris image technologies mainly include two evaluation algorithms in the space domain and frequency domain. The method based on the space domain is mainly based on the gradient function for sharpness evaluation, and the method based on the frequency domain is mainly used for the sharpness evaluation by wavelet transform. In image processing, it is generally believed that a...
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 an iris image definition evaluation method. The method comprises the following steps: extracting an iris area in an image; detecting the edge of the iris area to generate an iris image; determining a gradient direction of each pixel in the iris image; acquiring a gradient image based on the gradient direction information; and judging whether the iris image is clear or notaccording to the gradient image. According to the invention, definition evaluation is carried out according to iris image characteristics, an iris area can be accurately extracted, a reference image is not needed, the definition is consistent with subjective feelings of human eyes, certain robustness is achieved, and the accuracy of iris image definition evaluation is effectively improved.
Description
technical field [0001] The present disclosure relates to the field of image processing, in particular to a method and device for evaluating the definition of an iris image, electronic equipment, and a computer-readable storage medium. Background technique [0002] Among many biometric technologies, iris recognition has many advantages compared with other biometrics: uniqueness, stability, non-invasiveness, etc. In the iris recognition system, iris image quality evaluation is an important part. Due to the image quality problems of defocus blur, motion blur, squint, and light spots in the collected iris images, these low-quality images will reduce the accuracy of iris image recognition. Therefore, it is necessary to evaluate the quality of the iris image before performing iris recognition, and the definition is an important index in image quality evaluation. At present, there are many methods for evaluating the clarity of iris images. Due to the influence of noise such as gl...
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): G06T7/13G06T7/136G06T7/155G06T7/11G06T5/20G06K9/00
CPCG06T7/13G06T7/11G06T7/136G06T7/155G06T5/20G06T2207/30168G06V40/19
Inventor 张小亮王秀贞戚纪纲杨占金其他发明人请求不公开姓名
Owner 北京万里红科技有限公司