技术领域technical field
本发明涉及生物识别领域，特别是指一种提高虹膜识别装置识别准确性的方法及装置。The invention relates to the field of biological identification, in particular to a method and a device for improving the identification accuracy of an iris identification device.
背景技术Background technique
随着信息技术的迅猛发展，非法登陆计算机、银行卡等诈骗案都呈上升趋势，各种伪造证件、冒领合法者物品等案件也层出不穷，所以有效地鉴定个人身份对社会和经济的发展有着重大意义。With the rapid development of information technology, fraud cases such as illegally logging into computers and bank cards are on the rise, and various cases of forged documents and falsely claiming legal items are also emerging. Therefore, effective identification of personal identities is of great importance to social and economic development. Great significance.
虹膜作为重要的身份识别特征，具有终身唯一性、稳定性、可采集性以及非侵犯性等优点，是身份识别研究与应用发展的必然趋势。与指纹、人脸等身份识别方法相比，虹膜具有更高的准确性，加上更低的错误识别率成为选题的依据。As an important identification feature, the iris has the advantages of lifetime uniqueness, stability, collectability, and non-invasiveness. It is an inevitable trend in the development of identification research and application. Compared with identification methods such as fingerprints and faces, iris has higher accuracy, and the lower error recognition rate becomes the basis for topic selection.
虹膜识别的工作过程为：先将扫描的虹膜图像转换为数字代码，然后存储，进行注册。当进行身份识别的时候，只需要将扫描的被录入者的虹膜图像与事先存储的数字代码相比对，即可判明身份。The working process of iris recognition is: first convert the scanned iris image into a digital code, then store it and register it. When performing identity recognition, it is only necessary to compare the scanned iris image of the entered person with the digital code stored in advance to determine the identity.
虹膜识别系统由四个基本单元组成：图像采集、虹膜图像预处理、特征提取、模式匹配。The iris recognition system consists of four basic units: image acquisition, iris image preprocessing, feature extraction, and pattern matching.
外界环境光照强度(简称照度，单位Lux或Lx)的强弱将影响到人眼虹膜信息的多少，当光照强度比较强的时候，人眼的瞳孔缩小，虹膜信息量大；当光照强度比较弱的时候，人眼的瞳孔放大，虹膜信息量小。The light intensity of the external environment (referred to as illuminance, unit Lux or Lx) will affect the amount of iris information of the human eye. When the light intensity is relatively strong, the pupil of the human eye will shrink and the amount of iris information will be large; when the light intensity is relatively weak When the pupil of the human eye is dilated, the amount of information in the iris is small.
现有技术在进行虹膜的注册和识别的时候，无法保证外界环境的一致性，尤其是外界光照强度的一致性，这就使得现有技术存在一定的问题，就是：在虹膜注册时候采集虹膜图像的光照强度和虹膜识别时候采集虹膜图像的光照强度很难一样，当差距比较大的时候，会降低虹膜识别的准确性和速度。When the prior art registers and recognizes the iris, it cannot guarantee the consistency of the external environment, especially the consistency of the external light intensity. The light intensity of the iris image is difficult to be the same as the light intensity of the iris image collected during iris recognition. When the gap is relatively large, the accuracy and speed of iris recognition will be reduced.
发明内容Contents of the invention
本发明提供一种提高虹膜识别装置识别准确性的方法及装置，该方法提高了虹膜识别的准确性和识别效率。The invention provides a method and device for improving the recognition accuracy of an iris recognition device. The method improves the iris recognition accuracy and recognition efficiency.
为解决上述技术问题，本发明提供技术方案如下：In order to solve the problems of the technologies described above, the present invention provides technical solutions as follows:
一种提高虹膜识别装置识别准确性的方法，所述虹膜识别装置上设置有用于调节环境光照强度的照明装置和用于检测环境光照强度的照度检测装置，所述虹膜识别装置存储有用于标示光照强度的照度标识以及虹膜特征，所述虹膜特征为在所述照度标识的光照强度下采集到的虹膜特征，所述方法包括：A method for improving the recognition accuracy of an iris recognition device. The iris recognition device is provided with an illumination device for adjusting the intensity of ambient light and an illumination detection device for detecting the intensity of ambient light. Intensity illuminance identification and iris feature, the iris feature is the iris feature collected under the illumination intensity of the illuminance identification, the method includes:
步骤S101：通过照度检测装置检测当前环境的光照强度；Step S101: Detect the light intensity of the current environment through the illuminance detection device;
步骤S102：调节照明装置，使当前环境的光照强度与所述照度标识的光照强度一致；Step S102: Adjust the lighting device so that the light intensity of the current environment is consistent with the light intensity of the illuminance mark;
步骤S103：采集虹膜图像；Step S103: collecting iris images;
步骤S104：提取所述虹膜图像的虹膜特征；Step S104: Extracting iris features of the iris image;
步骤S105：将提取到的虹膜特征与所述虹膜识别装置存储的虹膜特征进行比对。Step S105: Compare the extracted iris features with the iris features stored in the iris recognition device.
一种提高虹膜识别装置识别准确性的装置，所述虹膜识别装置上设置有用于调节环境光照强度的照明装置和用于检测环境光照强度的照度检测装置，所述虹膜识别装置存储有用于标示光照强度的照度标识以及虹膜特征，所述虹膜特征为在所述照度标识的光照强度下采集到的虹膜特征，所述装置包括：A device for improving the recognition accuracy of an iris recognition device. The iris recognition device is provided with an illumination device for adjusting the intensity of ambient light and an illumination detection device for detecting the intensity of ambient light. Intensity illuminance identification and iris feature, the iris feature is the iris feature collected under the illumination intensity of the illuminance identification, the device includes:
照度检测模块，用于通过照度检测装置检测当前环境的光照强度；The illuminance detection module is used to detect the light intensity of the current environment through the illuminance detection device;
照度调节模块，用于调节照明装置，使当前环境的光照强度与所述照度标识的光照强度一致；The illuminance adjustment module is used to adjust the lighting device so that the light intensity of the current environment is consistent with the light intensity of the illuminance mark;
图像采集模块，用于采集虹膜图像；Image acquisition module, used for collecting iris images;
特征提取模块，用于提取所述虹膜图像的虹膜特征；Feature extraction module, for extracting the iris feature of the iris image;
特征比对模块，用于将提取到的虹膜特征与所述虹膜识别装置存储的虹膜特征进行比对。The feature comparison module is used to compare the extracted iris features with the iris features stored by the iris recognition device.
本发明具有以下有益效果：The present invention has the following beneficial effects:
本发明的提高虹膜识别装置识别准确性的方法在工作时，首先通过照度检测装置检测当前环境的光照强度；然后调节照明装置，使当前环境的光照强度与照度标识的光照强度一致；在该光照强度下采集虹膜图像并提取虹膜特征；最后将提取到的虹膜特征与照度标识对应的虹膜特征进行比对，完成识别过程。When the method for improving the recognition accuracy of the iris recognition device of the present invention is working, at first the illumination intensity of the current environment is detected by the illumination detection device; then the illumination device is adjusted to make the illumination intensity of the current environment consistent with the illumination intensity of the illumination mark; The iris image is collected under the intensity and the iris features are extracted; finally, the extracted iris features are compared with the iris features corresponding to the illuminance mark to complete the recognition process.
现有技术在虹膜识别的时候，将当前提取的虹膜特征和保存的唯一一幅虹膜特征进行比对，比对通过即认为虹膜识别通过，如果该次比对失败的话，将重新采集虹膜图像，提取虹膜特征，再次进行比对。与现有技术相比，本发明的提高虹膜识别装置识别准确性的方法在虹膜设备上增加了照明装置和照度检测装置，从而使虹膜注册和识别在同一外界光照强度条件下，从而大大提高了虹膜识别的准确性；相应的也减少了比对失败后重新采集虹膜图像、提取虹膜特征、再次进行比对的过程，提高了虹膜识别的效率，也避免了不同的照度条件下的虹膜特征进行比对所带来的一些问题。In the existing technology, when iris recognition is performed, the currently extracted iris feature is compared with the only saved iris feature. If the comparison is passed, the iris recognition is considered to be passed. If the comparison fails, the iris image will be re-collected. , extract iris features, and compare them again. Compared with the prior art, the method for improving the recognition accuracy of the iris recognition device of the present invention adds an illumination device and an illumination detection device to the iris device, so that the iris registration and recognition can be performed under the same external light intensity condition, thereby greatly improving The accuracy of iris recognition; correspondingly, it also reduces the process of re-collecting iris images, extracting iris features, and re-comparing after the comparison fails, which improves the efficiency of iris recognition and avoids iris features under different illumination conditions. Some problems caused by the comparison.
故本发明的提高虹膜识别装置识别准确性的方法提高了虹膜识别的准确性和识别效率。Therefore, the method for improving the recognition accuracy of the iris recognition device of the present invention improves the accuracy and recognition efficiency of iris recognition.
附图说明Description of drawings
图1为本发明的提高虹膜识别装置识别准确性的方法流程图；Fig. 1 is the flow chart of the method for improving the recognition accuracy of iris recognition device of the present invention;
图2为本发明的提高虹膜识别装置识别准确性的装置示意图。Fig. 2 is a schematic diagram of the device for improving the recognition accuracy of the iris recognition device according to the present invention.
具体实施方式detailed description
为使本发明要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
一方面，本发明提供一种提高虹膜识别装置识别准确性的方法，如图1所示，虹膜识别装置上设置有用于调节环境光照强度的照明装置和用于检测环境光照强度的照度检测装置，虹膜识别装置存储有用于标示光照强度的照度标识以及虹膜特征，虹膜特征为在该照度标识的光照强度下采集到的虹膜特征，方法包括：On the one hand, the present invention provides a method for improving the recognition accuracy of an iris recognition device. As shown in Figure 1, the iris recognition device is provided with an illumination device for adjusting the intensity of ambient light and an illuminance detection device for detecting the intensity of ambient light. The iris recognition device stores an illuminance mark and an iris feature for marking the light intensity, and the iris feature is an iris feature collected under the light intensity of the illuminance mark, and the method includes:
步骤S101：通过照度检测装置检测当前环境的光照强度；Step S101: Detect the light intensity of the current environment through the illuminance detection device;
在此之前，需要开机并开始虹膜识别过程，打开照明装置，如果有红外补光灯等设备的话，也一并开启；Before that, it is necessary to turn on the device and start the iris recognition process, turn on the lighting device, and if there are devices such as infrared fill light, turn it on at the same time;
步骤S102：调节照明装置，使当前环境的光照强度与照度标识的光照强度一致；Step S102: Adjust the lighting device so that the light intensity of the current environment is consistent with the light intensity of the illuminance label;
此时需要从存储器中读取照度标识，并根据照度标识的值调节照明装置；At this time, it is necessary to read the illuminance mark from the memory, and adjust the lighting device according to the value of the illuminance mark;
步骤S103：采集虹膜图像；Step S103: collecting iris images;
步骤S104：提取虹膜图像的虹膜特征；Step S104: Extracting iris features of the iris image;
步骤S105：将提取到的虹膜特征与虹膜识别装置存储的虹膜特征进行比对。Step S105: Compare the extracted iris features with the iris features stored in the iris recognition device.
上述步骤S101至S105是虹膜识别装置的识别过程，在识别过程之前，还应当包括注册过程，上述的照度标识以及虹膜特征就是在注册过程中完成的，具体的过程可以为：开始虹膜注册；打开红外补光灯，打开照明装置；调节照明装置，使当前环境的光照强度与照度标识的光照强度一致；采集虹膜图像；提取虹膜图像的虹膜特征；将提取到的虹膜特征存储，并使该虹膜特征与照度标识相关联；退出虹膜注册。当然这只是粗略的介绍，还可以包括其他步骤。The above steps S101 to S105 are the identification process of the iris identification device. Before the identification process, the registration process should also be included. The above-mentioned illuminance identification and iris features are completed during the registration process. The specific process can be: start iris registration; open Infrared supplementary light, turn on the lighting device; adjust the lighting device so that the light intensity of the current environment is consistent with the light intensity of the illuminance mark; collect the iris image; extract the iris feature of the iris image; store the extracted iris feature, and make the iris Feature is associated with illuminance ID; exit iris registration. Of course this is only a rough introduction and other steps can be included.
本发明的提高虹膜识别装置识别准确性的方法在工作时，首先通过照度检测装置检测当前环境的光照强度；然后调节照明装置，使当前环境的光照强度与照度标识的光照强度一致；在该光照强度下采集虹膜图像并提取虹膜特征；最后将提取到的虹膜特征与照度标识对应的虹膜特征进行比对，完成识别过程。When the method for improving the recognition accuracy of the iris recognition device of the present invention is working, at first the illumination intensity of the current environment is detected by the illumination detection device; then the illumination device is adjusted to make the illumination intensity of the current environment consistent with the illumination intensity of the illumination mark; The iris image is collected under the intensity and the iris features are extracted; finally, the extracted iris features are compared with the iris features corresponding to the illuminance mark to complete the recognition process.
现有技术在虹膜识别的时候，将当前提取的虹膜特征和保存的唯一一幅虹膜特征进行比对，比对通过即认为虹膜识别通过，如果该次比对失败的话，将重新采集虹膜图像，提取虹膜特征，再次进行比对。与现有技术相比，本发明的提高虹膜识别装置识别准确性的方法在虹膜设备上增加了照明装置和照度检测装置，从而使虹膜注册和识别在同一外界光照强度条件下，从而大大提高了虹膜识别的准确性；相应的也减少了比对失败后重新采集虹膜图像，提取虹膜特征，再次进行比对的过程，提高了虹膜识别的效率，也避免了不同的照度条件下的虹膜特征进行比对所带来的一些问题。(由于在不同的光照条件下，瞳孔大小是不一样的，这就使得的同一个人在不同的光照条件下的虹膜信息量不一样，所以引起的问题就是“拒真”，即同一个人的识别通过率会降低；再加上其它因素的影响，如图像拍摄的角度、图像拍摄的清晰度，将使“拒真”的情况发生的几率很高。另外，由于不同人的虹膜信息量的大小不同，对于虹膜信息量少的，当光线比较暗的时候，可能就很难提取到虹膜信息，而造成总是无法识别通过。)In the existing technology, when iris recognition is performed, the currently extracted iris feature is compared with the only saved iris feature. If the comparison is passed, the iris recognition is considered to be passed. If the comparison fails, the iris image will be re-collected. , extract iris features, and compare them again. Compared with the prior art, the method for improving the recognition accuracy of the iris recognition device of the present invention adds an illumination device and an illumination detection device to the iris device, so that the iris registration and recognition can be performed under the same external light intensity condition, thereby greatly improving The accuracy of iris recognition; correspondingly, it also reduces the process of re-collecting iris images after the comparison fails, extracts iris features, and performs the comparison again, which improves the efficiency of iris recognition and avoids iris features under different illumination conditions. Some problems caused by the comparison. (Because the pupil size is different under different lighting conditions, this makes the amount of iris information of the same person different under different lighting conditions, so the problem caused is "rejection", that is, the identification of the same person The pass rate will be reduced; coupled with the influence of other factors, such as the angle of image shooting and the clarity of image shooting, the probability of "rejecting the truth" will be very high. In addition, due to the size of the iris information of different people Different, for those with less iris information, when the light is relatively dark, it may be difficult to extract iris information, and it is always impossible to identify and pass.)
故本发明的提高虹膜识别装置识别准确性的方法提高了虹膜识别的准确性和识别效率。Therefore, the method for improving the recognition accuracy of the iris recognition device of the present invention improves the accuracy and recognition efficiency of iris recognition.
作为本发明的提高虹膜识别装置识别准确性的方法的一种改进，步骤S101之前还包括：As an improvement of the method for improving the recognition accuracy of the iris recognition device of the present invention, before step S101, it also includes:
步骤S100：启动定时器，设置定时时间；Step S100: start the timer and set the timing time;
步骤S102之后，步骤S103之前还包括：After step S102, before step S103 also includes:
步骤S1021：判断定时时间是否到，若是，表示虹膜识别超时，识别失败，输出结果并结束，否则，执行步骤S103；Step S1021: Determine whether the timing is up, if so, it means that the iris recognition has timed out, the recognition fails, output the result and end, otherwise, execute step S103;
步骤S103之后，步骤S104之前还包括：After step S103, before step S104 also includes:
步骤S1031：判断采集到的图像是否为虹膜图像，若否，转至步骤S1021。Step S1031: Determine whether the collected image is an iris image, if not, go to step S1021.
在提取虹膜图像的虹膜特征之前，需要判断采集到的图像是否为虹膜图像(如活体检测等)，若不是虹膜图像，则应当重新采集虹膜图像，如此循环，直到定时时间到后还没有符合条件的虹膜图像，则认为识别过程已超时，退出识别过程并输出结果。若没有上述过程，则很容易被人用人眼的照片等冒充虹膜，降低了虹膜识别的安全性。故本发明的提高虹膜识别装置识别准确性的方法同时提高了虹膜识别的安全性。Before extracting the iris features of the iris image, it is necessary to judge whether the collected image is an iris image (such as liveness detection, etc.), if it is not an iris image, the iris image should be re-acquired, and so on, until the time is up. iris image, it is considered that the recognition process has timed out, exit the recognition process and output the result. If there is no above-mentioned process, it is easy to be used as an iris by people using photos of human eyes, etc., which reduces the security of iris recognition. Therefore, the method for improving the recognition accuracy of the iris recognition device of the present invention improves the safety of iris recognition at the same time.
上述定时时间可以根据条件设置，优选为30s。由于虹膜注册过程中也存在虹膜采集的过程，上述步骤也可以用在虹膜注册的过程中。The aforementioned timing can be set according to conditions, and is preferably 30s. Since there is also an iris collection process in the iris registration process, the above steps can also be used in the iris registration process.
作为本发明的提高虹膜识别装置识别准确性的方法的另一种改进，步骤S1031进一步为：判断采集到的图像是否为虹膜图像，若是，执行步骤S1032或步骤S1032’，若否，转至步骤S1021；As another improvement of the method for improving the recognition accuracy of the iris recognition device of the present invention, step S1031 is further: judge whether the collected image is an iris image, if so, execute step S1032 or step S1032', if not, go to step S1021;
该方法还包括：The method also includes:
步骤S1032：获取虹膜图像的质量分值；Step S1032: Acquiring the quality score of the iris image;
步骤S1033：判断虹膜图像的质量分值是否优于上一幅虹膜图像的质量分值，若是，执行步骤S1034，否则，转至步骤S1035；Step S1033: Determine whether the quality score of the iris image is better than the quality score of the previous iris image, if so, execute step S1034, otherwise, go to step S1035;
步骤S1034：使用虹膜图像替换上一幅虹膜图像；Step S1034: replace the previous iris image with the iris image;
步骤S1035：判断是否采集了N幅虹膜图像，若是，执行步骤S104，否则，转至步骤S1021；N的数值可以取大于等于1的整数；Step S1035: Determine whether N iris images have been collected, if so, execute step S104, otherwise, go to step S1021; the value of N can be an integer greater than or equal to 1;
或者，方法还包括：Alternatively, the method also includes:
步骤S1032’：获取虹膜图像的质量分值；Step S1032': Acquire the quality score of the iris image;
步骤S1033’：判断虹膜图像的质量分值是否大于预设阈值，若是，执行步骤S104，否则，转至步骤S1021。Step S1033': Determine whether the quality score of the iris image is greater than a preset threshold, if yes, execute step S104, otherwise, go to step S1021.
在虹膜识别的过程中，虹膜图像的质量对识别的准确性有较大影响，故本发明的提高虹膜识别装置识别准确性的方法采用连续采集多幅虹膜图像并对其进行筛选的方法，选出质量高的虹膜图像，用于识别过程，故本发明的提高虹膜识别装置识别准确性的方法进一步的提高了虹膜识别的准确性。In the process of iris recognition, the quality of the iris image has a great influence on the accuracy of recognition, so the method for improving the recognition accuracy of the iris recognition device of the present invention adopts the method of continuously collecting multiple iris images and screening them. A high-quality iris image is used for the identification process, so the method for improving the identification accuracy of the iris identification device of the present invention further improves the accuracy of iris identification.
步骤S1032至步骤S1035是第一种筛选方法，该方法中，将采集到的虹膜图像进行处理，得到其质量分值(可以是0-100，亦可以是其他)，将质量分值与上一幅虹膜图像的质量分值进行比较，选出较好的一幅，当新采集得到虹膜图像时，重复进行上述过程，直到采集了N幅虹膜图像为止，N是事先预设的值，可以根据实际需要而定。这样就能够选出N幅虹膜图像中质量最高的一幅虹膜图像。Step S1032 to step S1035 is the first screening method. In this method, the collected iris image is processed to obtain its quality score (which can be 0-100 or other), and the quality score is compared with the previous one. Compare the quality scores of the iris images and select a better one. When the iris image is newly collected, repeat the above process until N iris images are collected. N is a preset value and can be calculated according to It depends on actual needs. In this way, an iris image with the highest quality among the N iris images can be selected.
步骤S1032’至步骤S1033’是第二种筛选方法，该方法中，将采集到的虹膜图像进行处理，得到其质量分值，若该质量分值大于设定的阈值，即认为选出了高质量的虹膜图像。阈值为事先设定的值，可根据实际需要而定。Step S1032' to step S1033' is the second screening method. In this method, the collected iris image is processed to obtain its quality score. If the quality score is greater than the set threshold, it is considered that a high Quality iris images. The threshold is a preset value, which can be determined according to actual needs.
上述两种方法均在定时器的定时时间内完成的，定时时间到后，超时退出，防止出现无限循环的情况，尤其是二种筛选方法。第一种筛选方法筛选出的虹膜图像质量最高，但是耗时较长；第二种筛选方法筛选出的虹膜图像质量较高，耗时较短。Both of the above two methods are completed within the timing of the timer, and when the timing is up, exit overtime to prevent an infinite loop, especially the two screening methods. The iris image screened by the first screening method is of the highest quality, but takes a long time; the iris image screened by the second screening method is of high quality and takes a short time.
由于虹膜注册过程中也存在虹膜采集的过程，上述步骤也可以用在虹膜注册的过程中，此时，虹膜注册的过程中的阈值与上述的阈值可以相同亦可以不同。Since there is also an iris collection process in the iris registration process, the above steps can also be used in the iris registration process. At this time, the threshold in the iris registration process can be the same as or different from the above threshold.
作为本发明的提高虹膜识别装置识别准确性的方法的再一种改进，照度标识可以为多个，每个照度标识的虹膜特征可以为多个，此时，在注册的过程中，需要在每个照度标识的光照强度下采集虹膜图像，提取虹膜特征并将其保存，而且还要将虹膜特征与照度标识相关联，在虹膜识别时，分为多种方式：As another improvement of the method for improving the recognition accuracy of the iris recognition device of the present invention, there can be multiple illuminance marks, and there can be multiple iris features for each illuminance mark. Collect the iris image under the light intensity of an illuminance mark, extract iris features and save them, and also associate the iris features with the illuminance mark. In iris recognition, there are many ways:
方式一：method one:
步骤S105包括：Step S105 includes:
步骤S1051：将提取到的虹膜特征与照度标识的虹膜特征进行逐一比对，若在比对完毕前，比对通过的数量达到设定值，则停止后续的比对并执行步骤S1052，否则，转至步骤S1021；Step S1051: Compare the extracted iris features with the iris features of the illuminance identification one by one. If the number of comparison passes reaches the set value before the comparison is completed, stop the subsequent comparison and execute step S1052. Otherwise, Go to step S1021;
步骤S1052：判断各个照度标识是否都比对完毕，若是，则执行步骤S1053，否则，转至步骤S1054；Step S1052: Determine whether all illuminance signs have been compared, if yes, execute step S1053, otherwise, go to step S1054;
步骤S1053：虹膜识别通过，输出结果并结束；Step S1053: Pass the iris recognition, output the result and end;
步骤S1054：切换照度标识，并转至步骤S1021；Step S1054: switch the illuminance indicator, and go to step S1021;
方式二：Method 2:
步骤S105包括：Step S105 includes:
步骤S1051’：将提取到的虹膜特征与照度标识的虹膜特征进行逐一比对，若在比对完毕前，比对通过的数量达到设定值，则停止后续的比对并执行步骤S1052’，否则，转至步骤S1053’；Step S1051': compare the extracted iris features with the iris features of the illuminance identification one by one, if the number of comparison passes reaches the set value before the comparison is completed, stop the subsequent comparison and execute step S1052', Otherwise, go to step S1053';
步骤S1052’：虹膜识别通过，输出结果并结束；Step S1052': pass the iris recognition, output the result and end;
步骤S1053’：判断各个照度标识是否都比对完毕，若是，则执行步骤S1054’，否则，转至步骤S1055’；Step S1053': judge whether each illuminance mark has been compared, if so, then execute step S1054', otherwise, go to step S1055';
步骤S1054’：虹膜识别未通过，输出结果并结束；Step S1054': iris recognition fails, output the result and end;
步骤S1055’：切换照度标识，并转至步骤S1021。Step S1055': switch the illuminance sign, and go to step S1021.
现有技术在虹膜识别的时候，将当前提取的虹膜特征和保存的唯一一幅虹膜特征进行比对，比对通过即认为虹膜识别通过，如果该次比对失败的话，将重新采集虹膜图像，提取虹膜特征，再次进行比对。本发明将当前提取的虹膜和存储的多幅特征进行比对，一次比对失败后，再次进行比对，省去了采集虹膜图像，提取虹膜特征的过程，进一步的提高了虹膜识别的效率。并且本发明设置了多个照度标识，分别进行注册和识别，由于每个人瞳孔的收缩性是不一样的，在某一光强下虹膜相似度高的两个人的眼睛，再另外一个光强下可能就会差别很大，故进一步的提高了识别的准确性。In the existing technology, when iris recognition is performed, the currently extracted iris feature is compared with the only saved iris feature. If the comparison is passed, the iris recognition is considered to be passed. If the comparison fails, the iris image will be re-collected. , extract iris features, and compare them again. The present invention compares the currently extracted iris with multiple stored features, and compares again after a failed comparison, which saves the process of collecting iris images and extracting iris features, and further improves the efficiency of iris recognition. And the present invention is provided with a plurality of illuminance signs, registers and identifies respectively, because the shrinkage of each person's pupil is not the same, the eyes of two people with high iris similarity under a certain light intensity, and then under another light intensity It may be very different, so the accuracy of recognition is further improved.
假设本发明的照度标识的值为L1、L2、L3……(L1<L2<L3<…)，在L1、L2、L3……每一光照强度下都注册有m幅虹膜特征(m＞1)，在进行虹膜识别的时候，虹膜识别的结果可以根据不同的安全级别确定。Assuming that the values of the illuminance label of the present invention are L1, L2, L3... (L1<L2<L3<...), there are m iris features registered under each light intensity of L1, L2, L3... (m>1 ), when performing iris recognition, the result of iris recognition can be determined according to different security levels.
例如，可以采用L1、L2、L3……每一光强条件下所提取的当前虹膜特征必须和该光强条件下所存储的m幅虹膜特征都必须比对通过的策略，用于高安全级别的场景中，此时采用方式一，设定值为m。此时保证了识别的准确性，提高了安全性能。For example, L1, L2, L3 can be adopted. The current iris feature extracted under each light intensity condition must be compared with the m iris features stored under the light intensity condition. It is used for high security levels In the scenario of , the first method is adopted at this time, and the set value is m. In this case, the accuracy of identification is guaranteed, and the safety performance is improved.
又例如，可采用L1、L2、L3……每一光强条件下所提取的当前的虹膜特征和该光强下存储的虹膜特征的部分比对通过即认为通过的策略，用于中安全级别的场景中，此时采用方式一，设定值小于m。此时兼顾了识别的准确性以及用户的体验效果For another example, it is possible to use L1, L2, L3... the strategy that the current iris feature extracted under each light intensity condition and the part of the iris feature stored under the light intensity is compared and passed, which is considered to be passed, for medium security level In the scenario of , the first method is adopted at this time, and the set value is less than m. At this time, both the accuracy of recognition and the user experience effect are taken into account
又例如，可采用L1、L2、L3……任一种光强下，只要当前所提取的虹膜特征和该光强下存储的虹膜特征的部分比对通过即认为通过的策略，用于低安全级别的场景中，此时采用方式二，设定值小于m。此时提高了识别效率，增强了用户的体验效果。For another example, under any light intensity of L1, L2, L3..., as long as the currently extracted iris feature and the part of the iris feature stored under the light intensity are compared and passed, the policy is considered to be passed, which is used for low security In the scenario of level, the second method is adopted at this time, and the set value is smaller than m. In this case, the recognition efficiency is improved, and the user experience effect is enhanced.
故本法发明的提高虹膜识别装置识别准确性的方法不仅进一步的提高了虹膜识别的准确性和效率，而且可以适用于多种场景。Therefore, the method for improving the recognition accuracy of the iris recognition device invented by the present method not only further improves the accuracy and efficiency of iris recognition, but also can be applied to various scenarios.
优选的，照度标识可以为3个(根据实际情况而定，对于更高安全级别要求的，如军用，可以采用5个或更多)，每个照度标识的虹膜特征可以为至少1个。Preferably, there may be three illuminance signs (according to the actual situation, for higher security requirements, such as military use, 5 or more may be used), and each illuminance sign may have at least one iris feature.
再者，本发明的提高虹膜识别装置识别准确性的方法，还可以用于虹膜活体检测，包括：Furthermore, the method for improving the recognition accuracy of the iris recognition device of the present invention can also be used for iris living detection, including:
步骤S106：比较在各个照度标识的光照强度下采集到的虹膜图像中虹膜信息量的大小，若光照强度强的虹膜图像中的虹膜信息量小于光照强度弱的虹膜图像中的虹膜信息量，则认为虹膜图像为活体虹膜图像。Step S106: Compare the amount of iris information in the iris images collected under the light intensity of each illuminance label, if the iris information in the iris image with strong light intensity is smaller than the iris information in the iris image with weak light intensity, then The iris image is considered a living iris image.
将不同照度标识的虹膜图像(同一用户的)种的虹膜信息量进行比对，当照度标识的光照强度强时，人眼的瞳孔缩小，虹膜信息量大，当照度标识的光照强度弱时，人眼的瞳孔扩大，虹膜信息量小。若使用图片或者视频欺诈虹膜识别装置，则在不同光照强度下采集到的虹膜图像的虹膜信息量不可能随光照强度变化，从而判断出采集到的是否是活体虹膜图像。进一步提高了虹膜识别的安全性。当然，还可以使光照强度按一定规律变化(如先强后弱等)，观察虹膜图像是否相应的变化，来确定采集到的是否是活体虹膜图像。Compare the amount of iris information of iris images (of the same user) marked with different illuminance. When the light intensity of the illuminance mark is strong, the pupil of the human eye will shrink and the amount of iris information will be large. When the light intensity of the illuminance mark is weak, The pupil of the human eye is dilated, and the iris has a small amount of information. If a picture or video is used to deceive the iris recognition device, the amount of iris information of the iris images collected under different light intensities cannot change with the light intensity, thereby judging whether the collected iris images are living iris images. The security of iris recognition is further improved. Of course, it is also possible to make the light intensity change according to a certain rule (such as strong first and then weak), and observe whether the iris image changes accordingly to determine whether the collected iris image is a live iris image.
上述步骤S106与其他步骤没有严格的先后关系，只要符合使用习惯即可。There is no strict sequence relationship between the above step S106 and other steps, as long as it conforms to usage habits.
与上述提高虹膜识别装置识别准确性的方法对应的，本发明还提供一种提高虹膜识别装置识别准确性的装置，如图2所示，虹膜识别装置上设置有用于调节环境光照强度的照明装置和用于检测环境光照强度的照度检测装置，虹膜识别装置存储有用于标示光照强度的照度标识以及虹膜特征，虹膜特征为在该照度标识的光照强度下采集到的虹膜特征，装置包括：Corresponding to the method for improving the recognition accuracy of the iris recognition device, the present invention also provides a device for improving the recognition accuracy of the iris recognition device. As shown in Figure 2, the iris recognition device is provided with a lighting device for adjusting the intensity of ambient light And the illuminance detection device for detecting the ambient light intensity, the iris recognition device stores an illuminance mark and an iris feature for marking the light intensity, and the iris feature is an iris feature collected under the light intensity of the illuminance mark, and the device includes:
照度检测模块11，用于通过照度检测装置检测当前环境的光照强度；The illumination detection module 11 is used to detect the illumination intensity of the current environment through the illumination detection device;
照度调节模块12，用于调节照明装置，使当前环境的光照强度与照度标识的光照强度一致；The illuminance adjustment module 12 is used to adjust the lighting device so that the illuminance of the current environment is consistent with the illuminance of the illuminance label;
图像采集模块13，用于采集虹膜图像；Image collection module 13, for collecting iris image;
特征提取模块14，用于提取虹膜图像的虹膜特征；Feature extraction module 14, for extracting the iris feature of iris image;
特征比对模块15，用于将提取到的虹膜特征与虹膜识别装置存储的虹膜特征进行比对。The feature comparison module 15 is configured to compare the extracted iris features with the iris features stored by the iris recognition device.
与上述提高虹膜识别装置识别准确性的方法对应的，本发明的提高虹膜识别装置识别准确性的装置提高了虹膜识别的准确性和识别效率。Corresponding to the above method for improving the recognition accuracy of the iris recognition device, the device for improving the recognition accuracy of the iris recognition device of the present invention improves the iris recognition accuracy and recognition efficiency.
作为本发明的提高虹膜识别装置识别准确性的装置的一种改进，照度检测模块之前还包括：As an improvement of the device for improving the recognition accuracy of the iris recognition device of the present invention, the illumination detection module also includes:
定时启动模块，用于启动定时器，设置定时时间；The timing start module is used to start the timer and set the timing time;
照度调节模块之后，图像采集模块之前还包括：After the illumination adjustment module, before the image acquisition module also includes:
第一判断模块，用于判断定时时间是否到，若是，表示虹膜识别超时，识别失败，输出结果并结束，否则，执行图像采集模块；The first judging module is used to judge whether the timing is up, if so, it means that the iris recognition is overtime, the recognition fails, the output result is finished, otherwise, the image acquisition module is executed;
图像采集模块之后，特征提取模块之前还包括：After the image acquisition module, before the feature extraction module also includes:
第二判断模块，用于判断采集到的图像是否为虹膜图像，若否，转至第一判断模块。The second judging module is used to judge whether the collected image is an iris image, if not, go to the first judging module.
与上述提高虹膜识别装置识别准确性的方法对应的，本发明的提高虹膜识别装置识别准确性的装置同时提高了虹膜识别的安全性。Corresponding to the above method for improving the recognition accuracy of the iris recognition device, the device for improving the recognition accuracy of the iris recognition device of the present invention also improves the security of iris recognition.
作为本发明的提高虹膜识别装置识别准确性的装置的另一种改进，第二判断模块进一步用于：判断采集到的图像是否为虹膜图像，若是，执行第一获取模块或第二获取模块，若否，转至第一判断模块；As another improvement of the device for improving the recognition accuracy of the iris recognition device of the present invention, the second judgment module is further used to: judge whether the collected image is an iris image, if so, execute the first acquisition module or the second acquisition module, If not, go to the first judging module;
该装置还包括：The unit also includes:
第一获取模块，用于获取虹膜图像的质量分值；The first obtaining module is used to obtain the quality score of the iris image;
第三判断模块，用于判断虹膜图像的质量分值是否优于上一幅虹膜图像的质量分值，若是，执行图像替换模块，否则，转至第四判断模块；The third judging module is used to judge whether the quality score of the iris image is better than the quality score of the previous iris image, if so, execute the image replacement module, otherwise, go to the fourth judging module;
图像替换模块，用于使用虹膜图像替换上一幅虹膜图像；The image replacement module is used to replace the previous iris image with the iris image;
第四判断模块，用于判断是否采集了N幅虹膜图像，若是，执行特征提取模块，否则，转至第一判断模块；N的数值可以取大于等于1的整数；The fourth judging module is used to judge whether N iris images have been collected, if so, execute the feature extraction module, otherwise, go to the first judging module; the value of N can be an integer greater than or equal to 1;
或者，该装置还包括：Optionally, the unit also includes:
第二获取模块，用于获取虹膜图像的质量分值；The second obtaining module is used to obtain the quality score of the iris image;
第五判断模块，用于判断虹膜图像的质量分值是否大于预设阈值，若是，执行特征提取模块，否则，转至第一判断模块。The fifth judging module is used to judge whether the quality score of the iris image is greater than the preset threshold, if so, execute the feature extraction module, otherwise, go to the first judging module.
与上述提高虹膜识别装置识别准确性的方法对应的，本发明的提高虹膜识别装置识别准确性的装置进一步的提高了虹膜识别的准确性。Corresponding to the above method for improving the recognition accuracy of the iris recognition device, the device for improving the recognition accuracy of the iris recognition device of the present invention further improves the iris recognition accuracy.
作为本发明的提高虹膜识别装置识别准确性的装置的另一种改进，照度标识为多个，每个照度标识的虹膜特征为多个，As another improvement of the device for improving the recognition accuracy of the iris recognition device of the present invention, there are multiple illuminance marks, and there are multiple iris features for each illuminance mark.
特征比对模块包括：Feature comparison modules include:
第一比对单元，用于将提取到的虹膜特征与照度标识的虹膜特征进行逐一比对，若在比对完毕前，比对通过的数量达到设定值，则停止后续的比对并执行第一判断单元，否则，转至第一判断模块；The first comparison unit is used to compare the extracted iris features with the iris features of the illuminance identification one by one. If the number of comparison passes reaches the set value before the comparison is completed, the subsequent comparison is stopped and executed. The first judging unit, otherwise, go to the first judging module;
第一判断单元，用于判断各个照度标识是否都比对完毕，若是，则执行第一输出单元，否则，转至第一切换单元；The first judging unit is used to judge whether all the illuminance signs have been compared, if so, execute the first output unit, otherwise, go to the first switching unit;
第一输出单元，用于虹膜识别通过，输出结果并结束；The first output unit is used for passing the iris recognition, outputting the result and ending;
第一切换单元，用于切换照度标识，并转至第一判断模块；The first switching unit is used to switch the illuminance sign and transfer to the first judging module;
或者，特征比对模块包括：Alternatively, the feature comparison module includes:
第二比对单元，用于将提取到的虹膜特征与照度标识的虹膜特征进行逐一比对，若在比对完毕前，比对通过的数量达到设定值，则停止后续的比对并执行第二输出单元，否则，转至第二判断单元；The second comparison unit is used to compare the extracted iris features with the iris features of the illuminance identification one by one. If the number of comparison passes reaches the set value before the comparison is completed, the subsequent comparison is stopped and executed. the second output unit, otherwise, go to the second judging unit;
第二输出单元，用于虹膜识别通过，输出结果并结束；The second output unit is used for passing the iris recognition, outputting the result and ending;
第二判断单元，用于判断各个照度标识是否都比对完毕，若是，则执行第三输出单元，否则，转至第二切换单元；The second judging unit is used to judge whether all the illuminance signs have been compared, if so, execute the third output unit, otherwise, go to the second switching unit;
第三输出单元，用于虹膜识别未通过，输出结果并结束；The third output unit is used for failing iris recognition, outputting the result and ending;
第二切换单元，用于切换照度标识，并转至第一判断模块。The second switching unit is used to switch the illuminance sign and transfer to the first judging module.
与上述提高虹膜识别装置识别准确性的方法对应的，本发明的提高虹膜识别装置识别准确性的装置不仅进一步的提高了虹膜识别的准确性和效率，而且可以适用于多种场景。Corresponding to the above-mentioned method for improving the recognition accuracy of the iris recognition device, the device for improving the recognition accuracy of the iris recognition device of the present invention not only further improves the accuracy and efficiency of iris recognition, but also can be applied to various scenarios.
优选的，照度标识可以为3个，每个照度标识的虹膜特征可以为至少1个。Preferably, there may be three illuminance marks, and each illuminance mark may have at least one iris feature.
再者，本发明的提高虹膜识别装置识别准确性的装置，还可以用于虹膜活体检测，包括：Furthermore, the device for improving the recognition accuracy of the iris recognition device of the present invention can also be used for iris living detection, including:
比较模块，用于比较在各个照度标识的光照强度下采集到的虹膜图像中虹膜信息量的大小，若光照强度强的虹膜图像中的虹膜信息量大于光照强度弱的虹膜图像中的虹膜信息量，则认为虹膜图像为活体虹膜图像。进一步提高了虹膜识别的安全性。The comparison module is used to compare the amount of iris information in the iris image collected under the light intensity of each illuminance mark, if the iris information in the iris image with strong light intensity is greater than the iris information in the iris image with weak light intensity , the iris image is considered to be a living iris image. The security of iris recognition is further improved.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510335118.4ACN105447443B (en) | 2015-06-16 | 2015-06-16 | Improve the method and device of iris identification device identification accuracy |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510335118.4ACN105447443B (en) | 2015-06-16 | 2015-06-16 | Improve the method and device of iris identification device identification accuracy |
| Publication Number | Publication Date |
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| CN105447443Atrue CN105447443A (en) | 2016-03-30 |
| CN105447443B CN105447443B (en) | 2019-03-19 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201510335118.4AActiveCN105447443B (en) | 2015-06-16 | 2015-06-16 | Improve the method and device of iris identification device identification accuracy |
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