CN105809133A - Fingerprint feature information updating method and device - Google Patents
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Abstract
本发明公开了一种指纹特征信息更新方法及装置。所述方法包括以下步骤：A、接收用户输入的指纹信息；B、检测所述指纹信息所对应的指纹图像中的坏点，并生成检测结果；C、根据所述检测结果判断所述指纹图像中的坏点的数量是否小于预定阈值，并生成判断结果；D、在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，将所述指纹信息所对应的指纹特征信息更新到指纹特征参考模板中。本发明能避免坏点特征更新到用于指纹识别操作指纹特征参考模板中。
The present invention discloses a fingerprint feature information updating method and device. The method comprises the following steps: A. receiving fingerprint information input by a user; B. detecting bad pixels in a fingerprint image corresponding to the fingerprint information, and generating a detection result; C. judging whether the number of bad pixels in the fingerprint image is less than a predetermined threshold value according to the detection result, and generating a judgment result; D. updating the fingerprint feature information corresponding to the fingerprint information to a fingerprint feature reference template when the judgment result is that the number of bad pixels in the fingerprint image is less than the predetermined threshold value. The present invention can prevent bad pixel features from being updated to a fingerprint feature reference template used for fingerprint identification operations.
Description
技术领域technical field
本发明属于指纹特征信息更新技术领域，尤其涉及一种指纹特征信息更新方法及装置。The invention belongs to the technical field of updating fingerprint feature information, and in particular relates to a method and device for updating fingerprint feature information.
背景技术Background technique
传统的用户设备(例如，智能手机)一般集成有指纹识别模块。Traditional user equipment (for example, a smart phone) is generally integrated with a fingerprint recognition module.
所述指纹识别模块用于对用户输入的指纹信息进行识别，并向所述用户设备反馈识别结果。The fingerprint identification module is used for identifying the fingerprint information input by the user, and feeding back the identification result to the user equipment.
所述指纹识别模块还用于在用户输入指纹信息后将质量较高的指纹图像更新到指纹模板里面去，以及用于删去质量较差的指纹模板。通过不断地更新所述指纹模板，便可以不断地完善指纹模板，这样有利于使得所述指纹模板越来越接近用户的真实指纹，从而降低指纹识别操作的拒真率。The fingerprint identification module is also used to update the fingerprint image with higher quality into the fingerprint template after the user inputs the fingerprint information, and to delete the fingerprint template with lower quality. By continuously updating the fingerprint template, the fingerprint template can be continuously improved, which is beneficial to make the fingerprint template more and more close to the real fingerprint of the user, thereby reducing the rejection rate of the fingerprint identification operation.
然而，在实践中，发明人发现现有技术至少存在以下技术问题：However, in practice, the inventors have found that the prior art has at least the following technical problems:
当所述指纹识别模块因用户按压过重，或受到静电损伤而导致部分区域损坏时，所述用户所输入的指纹图像就会出现坏点。When part of the fingerprint recognition module is damaged due to excessive pressing by the user or electrostatic damage, dead pixels will appear in the fingerprint image input by the user.
而当所述坏点被更新到所述指纹模板中时，就会使得所述指纹模板无法正确地反映用户的真实指纹。However, when the bad points are updated into the fingerprint template, the fingerprint template cannot correctly reflect the real fingerprint of the user.
此时，其它人向所述用户设备录入指纹时，由于坏点固定于所述指纹识别模块中，因此，其它人的指纹图像也会存在所述坏点。其它人的指纹图像中的坏点会被当成特征点去匹配，所以不论是谁的指纹，特征点都很相似，导致任何人都可以进行解锁所述用户设备或开启所述用户设备相应的应用权限。At this time, when other people enter fingerprints into the user equipment, since the dead pixels are fixed in the fingerprint identification module, the fingerprint images of other people also have the dead pixels. The bad points in other people's fingerprint images will be used as feature points to match, so no matter whose fingerprint, the feature points are very similar, so that anyone can unlock the user device or open the corresponding application of the user device permission.
也就是说，一定数量的坏点的存在会导致指纹识别效果失真，其他人可以轻易地利用这个漏洞控制所述用户设备解锁或开启所述用户设备的应用的权限。That is to say, the existence of a certain number of bad pixels will lead to distortion of the fingerprint identification effect, and other people can easily use this loophole to control the permission of unlocking or opening the application of the user equipment.
发明内容Contents of the invention
本发明的目的在于提供一种指纹特征信息更新方法及装置，其能避免坏点特征更新到用于指纹识别操作指纹特征参考模板中。The object of the present invention is to provide a method and device for updating fingerprint feature information, which can prevent bad pixel features from being updated into the fingerprint feature reference template for fingerprint identification operations.
为了解决以上技术问题，本发明的技术方案如下：In order to solve the above technical problems, the technical solution of the present invention is as follows:
一种指纹特征信息更新方法，所述方法包括以下步骤：A、接收用户输入的指纹信息；B、检测所述指纹信息所对应的指纹图像中的坏点，并生成检测结果；C、根据所述检测结果判断所述指纹图像中的坏点的数量是否小于预定阈值，并生成判断结果；D、在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，将所述指纹信息所对应的指纹特征信息更新到指纹特征参考模板中。A method for updating fingerprint feature information, said method comprising the following steps: A. receiving fingerprint information input by a user; B. detecting bad spots in a fingerprint image corresponding to said fingerprint information, and generating a detection result; C. The detection result judges whether the number of dead pixels in the fingerprint image is less than a predetermined threshold, and generates a judgment result; D. If the judgment result is that the number of dead pixels in the fingerprint image is smaller than the predetermined threshold In this case, update the fingerprint feature information corresponding to the fingerprint information into the fingerprint feature reference template.
在上述指纹特征信息更新方法中，在所述步骤A之后，以及在所述步骤B之前，所述方法还包括以下步骤：E、从所述指纹信息中提取第一指纹特征信息集合，其中，所述第一指纹特征信息集合包括至少一第一指纹特征信息；所述步骤B为：根据至少一所述第一指纹特征信息检测所述指纹图像中的坏点，并生成所述检测结果。In the above method for updating fingerprint feature information, after step A and before step B, the method further includes the following steps: E. Extracting a first set of fingerprint feature information from the fingerprint information, wherein, The first fingerprint feature information set includes at least one first fingerprint feature information; the step B is: detecting bad spots in the fingerprint image according to at least one first fingerprint feature information, and generating the detection result.
在上述指纹特征信息更新方法中，所述步骤D为：在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，将所述第一指纹特征信息集合与指纹特征参考模板的第二指纹特征信息集合的区别指纹特征信息添加到所述指纹特征参考模板中。In the above method for updating fingerprint feature information, the step D is: when the judgment result is that the number of bad pixels in the fingerprint image is less than the predetermined threshold, update the first fingerprint feature information to The distinctive fingerprint feature information of the set and the second fingerprint feature information set of the fingerprint feature reference template is added to the fingerprint feature reference template.
在上述指纹特征信息更新方法中，在所述步骤C之后，以及在所述步骤D之前，所述方法还包括以下步骤：F、在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，计算所述第一指纹特征信息集合与所述第二指纹特征信息集合的匹配度，并生成计算结果；所述步骤D为：在所述计算结果为所述匹配度大于预定阈值的情况下，将所述区别指纹特征信息添加到所述指纹特征参考模板中。In the above method for updating fingerprint feature information, after the step C and before the step D, the method further includes the following steps: F, when the judgment result is the dead point in the fingerprint image In the case where the number is less than the predetermined threshold, calculate the matching degree between the first set of fingerprint feature information and the second set of fingerprint feature information, and generate a calculation result; the step D is: when the calculation result is When the matching degree is greater than a predetermined threshold, the distinguishing fingerprint feature information is added to the fingerprint feature reference template.
在上述指纹特征信息更新方法中，在所述步骤F之后，以及在所述步骤D之前，所述方法还包括以下步骤：G、在所述计算结果为所述匹配度大于预定阈值的情况下，将所述第一指纹特征信息集合与所述第二指纹特征信息集合进行比较，以生成所述区别指纹特征信息。In the above method for updating fingerprint feature information, after the step F and before the step D, the method further includes the following steps: G. When the calculation result is that the matching degree is greater than a predetermined threshold and comparing the first set of fingerprint feature information with the second set of fingerprint feature information to generate the distinguishing fingerprint feature information.
一种指纹特征信息更新装置，所述装置包括：接收模块，用于收用户输入的指纹信息；检测模块，用于检测所述指纹信息所对应的指纹图像中的坏点，并生成检测结果；判断模块，用于根据所述检测结果判断所述指纹图像中的坏点的数量是否小于预定阈值，并生成判断结果；更新模块，用于在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，将所述指纹信息所对应的指纹特征信息更新到指纹特征参考模板中。A device for updating fingerprint feature information, the device comprising: a receiving module for receiving fingerprint information input by a user; a detection module for detecting bad spots in a fingerprint image corresponding to the fingerprint information and generating a detection result; A judging module, configured to judge whether the number of dead pixels in the fingerprint image is less than a predetermined threshold according to the detection result, and generate a judgment result; When the number of dead pixels is less than the predetermined threshold, update the fingerprint feature information corresponding to the fingerprint information into the fingerprint feature reference template.
在上述指纹特征信息更新装置中，所述装置还包括：提取模块，用于从所述指纹信息中提取第一指纹特征信息集合，其中，所述第一指纹特征信息集合包括至少一第一指纹特征信息；所述检测模块还用于根据至少一所述第一指纹特征信息检测所述指纹图像中的坏点，并生成所述检测结果。In the above device for updating fingerprint feature information, the device further includes: an extraction module, configured to extract a first set of fingerprint feature information from the fingerprint information, wherein the first set of fingerprint feature information includes at least one first fingerprint Feature information; the detection module is further configured to detect bad spots in the fingerprint image according to at least one piece of the first fingerprint feature information, and generate the detection result.
在上述指纹特征信息更新装置中，所述更新模块用于在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，将所述第一指纹特征信息集合与指纹特征参考模板的第二指纹特征信息集合的区别指纹特征信息添加到所述指纹特征参考模板中。In the above device for updating fingerprint feature information, the update module is configured to update the first fingerprint feature information to The distinctive fingerprint feature information of the set and the second fingerprint feature information set of the fingerprint feature reference template is added to the fingerprint feature reference template.
在上述指纹特征信息更新装置中，所述装置还包括：计算模块，用于在所述判断结果为所述指纹图像中的所述坏点的数量小于所述预定阈值的情况下，计算所述第一指纹特征信息集合与所述第二指纹特征信息集合的匹配度，并生成计算结果；所述更新模块还用于在所述计算结果为所述匹配度大于预定阈值的情况下，将所述区别指纹特征信息添加到所述指纹特征参考模板中。In the above device for updating fingerprint feature information, the device further includes: a calculation module, configured to calculate the The matching degree of the first set of fingerprint feature information and the second set of fingerprint feature information, and generate a calculation result; the update module is also used to update the matching degree if the calculation result is greater than a predetermined threshold. The distinguishing fingerprint feature information is added to the fingerprint feature reference template.
在上述指纹特征信息更新装置中，所述装置还包括：比较模块，用于在所述计算结果为所述匹配度大于预定阈值的情况下，将所述第一指纹特征信息集合与所述第二指纹特征信息集合进行比较，以生成所述区别指纹特征信息。In the above device for updating fingerprint feature information, the device further includes: a comparison module, configured to compare the first set of fingerprint feature information with the second The two sets of fingerprint feature information are compared to generate the distinguishing fingerprint feature information.
相对于现有技术，本发明能避免坏点特征更新到用于指纹识别操作指纹特征参考模板中。Compared with the prior art, the present invention can avoid updating the features of bad pixels into the fingerprint feature reference template for fingerprint identification operation.
附图说明Description of drawings
图1是本发明的指纹特征信息更新装置的框图；Fig. 1 is the block diagram of fingerprint feature information updating device of the present invention;
图2是本发明的指纹特征信息更新方法的流程图；Fig. 2 is the flowchart of the method for updating fingerprint feature information of the present invention;
图3是存在坏点的指纹图像的示意图。Fig. 3 is a schematic diagram of a fingerprint image with dead pixels.
具体实施方式detailed description
请参照图式，其中相同的组件符号代表相同的组件。以下的说明是基于所例示的本发明具体实施例，其不应被视为限制本发明未在此详述的其它具体实施例。Referring to the drawings, like reference symbols represent like components. The following description is based on illustrated specific embodiments of the invention, which should not be construed as limiting other specific embodiments of the invention not described in detail herein.
本发明的指纹特征信息更新装置和方法可实施于用户设备中，所述用户设备可例如为智能手机、可穿戴设备、数码相机、平板电脑、智能电视、遥控器等电子设备。The device and method for updating fingerprint feature information of the present invention can be implemented in user equipment, such as electronic equipment such as smart phones, wearable devices, digital cameras, tablet computers, smart TVs, and remote controls.
参考图1和图3，图1是本发明的指纹特征信息更新装置的框图，图3是存在坏点的指纹图像的示意图。Referring to FIG. 1 and FIG. 3 , FIG. 1 is a block diagram of an apparatus for updating fingerprint feature information of the present invention, and FIG. 3 is a schematic diagram of a fingerprint image with dead pixels.
在本发明的指纹特征信息更新装置包括接收模块101、检测模块103、判断模块104、更新模块107。The device for updating fingerprint feature information in the present invention includes a receiving module 101 , a detecting module 103 , a judging module 104 and an updating module 107 .
所述接收模块101用于收用户输入的指纹信息。所述指纹信息可例如为所述用户设备在针对用户执行指纹识别/认证操作时获取的指纹图像的信息。The receiving module 101 is used for receiving the fingerprint information input by the user. The fingerprint information may be, for example, information of a fingerprint image acquired by the user equipment when performing a fingerprint identification/authentication operation on the user.
所述检测模块103用于检测所述指纹信息所对应的指纹图像中的坏点301，并生成检测结果。所述坏点301为所述指纹图像中不属于所述指纹图像所对应的指纹的点，所述坏点301可例如是由指纹输入模块中粘附有异物产生的，或者，所述坏点301可例如是由所述指纹输入模块中某个部分收到静电损伤而产生的，或者，所述坏点301可例如是由用户对所述指纹输入模块按压过重产生的。The detection module 103 is used to detect the bad spots 301 in the fingerprint image corresponding to the fingerprint information, and generate a detection result. The dead point 301 is a point in the fingerprint image that does not belong to the fingerprint corresponding to the fingerprint image, and the dead point 301 may, for example, be caused by a foreign matter adhering to the fingerprint input module, or the dead point 301 may be generated, for example, by a certain part of the fingerprint input module being damaged by static electricity, or, the dead point 301 may be generated, for example, by the user pressing the fingerprint input module too hard.
所述判断模块104用于根据所述检测结果判断所述指纹图像中的坏点301的数量是否小于预定阈值，并生成判断结果。所述预定阈值可例如为1，即，所述判断模块104用于根据所述检测结果判断所述指纹图像中是否存在坏点301。The judging module 104 is configured to judge whether the number of bad spots 301 in the fingerprint image is less than a predetermined threshold according to the detection result, and generate a judgment result. The predetermined threshold may be, for example, 1, that is, the judging module 104 is configured to judge whether there is a dead pixel 301 in the fingerprint image according to the detection result.
所述更新模块107用于在所述判断结果为所述指纹图像中的所述坏点301的数量小于所述预定阈值的情况下，将所述指纹信息所对应的指纹特征信息更新到指纹特征参考模板中。例如，所述更新模块107用于在所述判断结果为所述指纹图像中不存在所述坏点301的情况下，将所述指纹特征信息更新到所述指纹特征参考模板中。其中，所述指纹特征参考模板用于提供给所述用户设备的指纹识别模块，以作为指纹识别操作的参考对象(比对参考信息)。The update module 107 is configured to update the fingerprint feature information corresponding to the fingerprint information to the in the reference template. For example, the update module 107 is configured to update the fingerprint feature information into the fingerprint feature reference template when the judgment result is that the bad point 301 does not exist in the fingerprint image. Wherein, the fingerprint feature reference template is provided to the fingerprint identification module of the user equipment as a reference object (comparison reference information) for fingerprint identification operations.
在本发明的指纹特征信息更新装置中，所述装置还包括提取模块102。In the device for updating fingerprint feature information of the present invention, the device further includes an extraction module 102 .
所述提取模块102用于从所述指纹信息中提取第一指纹特征信息集合(第一指纹特征点集合)，其中，所述第一指纹特征信息集合包括至少一第一指纹特征信息(第一指纹特征点)。The extraction module 102 is used to extract a first fingerprint feature information set (first fingerprint feature point set) from the fingerprint information, wherein the first fingerprint feature information set includes at least one first fingerprint feature information (first fingerprint feature point set). fingerprint feature points).
所述检测模块103还用于根据至少一所述第一指纹特征信息检测所述指纹图像中的坏点301，并生成所述检测结果。所述检测模块103用于根据所述指纹图像中的部分区域中的至少一所述第一指纹特征信息所对应的点(第一指纹特征点)的属性是否与指纹的属性相符，并生成所述检测结果。其中，在所述指纹图像中的部分区域中的至少一所述第一指纹特征信息所对应的点的属性与指纹的属性不相符的情况下，所述指纹图像中的部分区域中的至少一所述第一指纹特征信息所对应的点为所述坏点301。The detection module 103 is further configured to detect a bad point 301 in the fingerprint image according to at least one piece of the first fingerprint feature information, and generate the detection result. The detection module 103 is used to generate the fingerprint according to whether the attribute of at least one point (first fingerprint feature point) corresponding to the first fingerprint feature information in the partial area of the fingerprint image is consistent with the attribute of the fingerprint. test results described above. Wherein, in the case where the attribute of at least one point corresponding to the first fingerprint feature information in the partial area of the fingerprint image does not match the attribute of the fingerprint, at least one of the partial areas in the fingerprint image The point corresponding to the first fingerprint feature information is the bad point 301 .
在本发明的指纹特征信息更新装置中，所述更新模块107用于在所述判断结果为所述指纹图像中的所述坏点301的数量小于所述预定阈值的情况下，将所述第一指纹特征信息集合与指纹特征参考模板的第二指纹特征信息集合的区别指纹特征信息添加到所述指纹特征参考模板中。所述区别指纹特征信息可例如为所述第一指纹特征信息集合相对所述第二指纹特征信息集合新增的指纹特征信息。其中，所述指纹特征参考模板是预先存储于所述用户设备的数据库中的。In the device for updating fingerprint feature information of the present invention, the update module 107 is configured to update the second The difference fingerprint feature information between a set of fingerprint feature information and a second set of fingerprint feature information of the fingerprint feature reference template is added to the fingerprint feature reference template. The distinguishing fingerprint feature information may be, for example, fingerprint feature information added to the first set of fingerprint feature information relative to the second set of fingerprint feature information. Wherein, the fingerprint feature reference template is pre-stored in the database of the user equipment.
在本发明的指纹特征信息更新装置中，所述装置还包括计算模块105。In the device for updating fingerprint feature information of the present invention, the device further includes a calculation module 105 .
所述计算模块105用于在所述判断结果为所述指纹图像中的所述坏点301的数量小于所述预定阈值的情况下，计算所述第一指纹特征信息集合与所述第二指纹特征信息集合的匹配度，并生成计算结果。The calculation module 105 is configured to calculate the first fingerprint feature information set and the second fingerprint when the judgment result is that the number of the bad spots 301 in the fingerprint image is less than the predetermined threshold. The matching degree of the feature information set, and generate calculation results.
所述更新模块107还用于在所述计算结果为所述匹配度大于预定阈值的情况下，将所述区别指纹特征信息添加到所述指纹特征参考模板中。The update module 107 is further configured to add the distinguishing fingerprint feature information to the fingerprint feature reference template when the calculation result is that the matching degree is greater than a predetermined threshold.
在本发明的指纹特征信息更新装置中，所述装置还包括比较模块106。In the device for updating fingerprint feature information of the present invention, the device further includes a comparison module 106 .
所述比较模块106用于在所述计算结果为所述匹配度大于预定阈值的情况下，将所述第一指纹特征信息集合与所述第二指纹特征信息集合进行比较，以生成所述区别指纹特征信息。The comparison module 106 is configured to compare the first set of fingerprint feature information with the second set of fingerprint feature information to generate the difference when the calculation result is that the matching degree is greater than a predetermined threshold. Fingerprint feature information.
参考图2和图3，图2是本发明的指纹特征信息更新方法的流程图。Referring to FIG. 2 and FIG. 3 , FIG. 2 is a flow chart of the method for updating fingerprint feature information of the present invention.
本发明的指纹特征信息更新方法包括以下步骤：The method for updating fingerprint feature information of the present invention comprises the following steps:
A(步骤201)、所述接收模块101接收用户输入的指纹信息。所述指纹信息可例如为所述用户设备在针对用户执行指纹识别/认证操作时获取的指纹图像的信息。A (step 201), the receiving module 101 receives the fingerprint information input by the user. The fingerprint information may be, for example, information of a fingerprint image acquired by the user equipment when performing a fingerprint identification/authentication operation on the user.
B(步骤203)、所述检测模块103检测所述指纹信息所对应的指纹图像中的坏点301，并生成检测结果。所述坏点301为所述指纹图像中不属于所述指纹图像所对应的指纹的点，所述坏点301可例如是由指纹输入模块中粘附有异物产生的，或者，所述坏点301可例如是由所述指纹输入模块中某个部分收到静电损伤而产生的，或者，所述坏点301可例如是由用户对所述指纹输入模块按压过重产生的。B (step 203), the detection module 103 detects the bad spots 301 in the fingerprint image corresponding to the fingerprint information, and generates a detection result. The dead point 301 is a point in the fingerprint image that does not belong to the fingerprint corresponding to the fingerprint image, and the dead point 301 may, for example, be caused by a foreign matter adhering to the fingerprint input module, or the dead point 301 may be generated, for example, by a certain part of the fingerprint input module being damaged by static electricity, or, the dead point 301 may be generated, for example, by the user pressing the fingerprint input module too hard.
C(步骤204)、所述判断模块104根据所述检测结果判断所述指纹图像中的坏点301的数量是否小于预定阈值，并生成判断结果。所述预定阈值可例如为1，即，所述判断模块104根据所述检测结果判断所述指纹图像中是否存在坏点301。C (step 204), the judging module 104 judges whether the number of bad spots 301 in the fingerprint image is less than a predetermined threshold according to the detection result, and generates a judging result. The predetermined threshold may be 1, for example, that is, the judging module 104 judges whether there is a dead pixel 301 in the fingerprint image according to the detection result.
D(步骤207)、所述更新模块107在所述判断结果为所述指纹图像中的所述坏点301的数量小于所述预定阈值的情况下，将所述指纹信息所对应的指纹特征信息更新到指纹特征参考模板中。例如，所述更新模块107在所述判断结果为所述指纹图像中不存在所述坏点301的情况下，将所述指纹特征信息更新到所述指纹特征参考模板中。其中，所述指纹特征参考模板提供给所述用户设备的指纹识别模块，以作为指纹识别操作的参考对象(比对参考信息)。D (step 207), the update module 107, when the judgment result is that the number of the dead spots 301 in the fingerprint image is less than the predetermined threshold, update the fingerprint feature information corresponding to the fingerprint information Update to the fingerprint feature reference template. For example, the update module 107 updates the fingerprint feature information into the fingerprint feature reference template when the judgment result is that the bad point 301 does not exist in the fingerprint image. Wherein, the fingerprint feature reference template is provided to the fingerprint identification module of the user equipment as a reference object (comparison reference information) for fingerprint identification operations.
在本发明的指纹特征信息更新方法中，在所述步骤A之后，以及在所述步骤B之前，所述方法还包括以下步骤：In the method for updating fingerprint feature information of the present invention, after the step A, and before the step B, the method further includes the following steps:
E(步骤202)、所述提取模块102从所述指纹信息中提取第一指纹特征信息集合，其中，所述第一指纹特征信息集合包括至少一第一指纹特征信息。E (step 202), the extraction module 102 extracts a first fingerprint feature information set from the fingerprint information, wherein the first fingerprint feature information set includes at least one first fingerprint feature information.
所述步骤B(所述步骤203)为：The step B (the step 203) is:
所述检测模块103根据至少一所述第一指纹特征信息检测所述指纹图像中的坏点301，并生成所述检测结果。所述检测模块103根据所述指纹图像中的部分区域中的至少一所述第一指纹特征信息所对应的点(第一指纹特征点)的属性是否与指纹的属性相符，并生成所述检测结果。其中，在所述指纹图像中的部分区域中的至少一所述第一指纹特征信息所对应的点的属性与指纹的属性不相符的情况下，所述指纹图像中的部分区域中的至少一所述第一指纹特征信息所对应的点为所述坏点301。The detection module 103 detects a bad point 301 in the fingerprint image according to at least one piece of the first fingerprint feature information, and generates the detection result. The detection module 103 generates the detection module 103 according to whether the attribute of at least one point (first fingerprint feature point) corresponding to the first fingerprint feature information in the partial area of the fingerprint image matches the attribute of the fingerprint. result. Wherein, in the case where the attribute of at least one point corresponding to the first fingerprint feature information in the partial area of the fingerprint image does not match the attribute of the fingerprint, at least one of the partial areas in the fingerprint image The point corresponding to the first fingerprint feature information is the bad point 301 .
在本发明的指纹特征信息更新方法中，所述步骤D(所述步骤207)为：In the method for updating fingerprint feature information of the present invention, the step D (the step 207) is:
在所述判断结果为所述指纹图像中的所述坏点301的数量小于所述预定阈值的情况下，所述更新模块107将所述第一指纹特征信息集合与指纹特征参考模板的第二指纹特征信息集合的区别指纹特征信息添加到所述指纹特征参考模板中。所述区别指纹特征信息可例如为所述第一指纹特征信息集合相对所述第二指纹特征信息集合新增的指纹特征信息。其中，所述指纹特征参考模板是预先存储于所述用户设备的数据库中的。When the judgment result is that the number of bad spots 301 in the fingerprint image is less than the predetermined threshold, the update module 107 combines the first set of fingerprint feature information with the second set of fingerprint feature reference templates. The distinctive fingerprint feature information of the fingerprint feature information set is added to the fingerprint feature reference template. The distinguishing fingerprint feature information may be, for example, fingerprint feature information added to the first set of fingerprint feature information relative to the second set of fingerprint feature information. Wherein, the fingerprint feature reference template is pre-stored in the database of the user equipment.
在本发明的指纹特征信息更新方法中，在所述步骤C之后，以及在所述步骤D之前，所述方法还包括以下步骤：In the method for updating fingerprint feature information of the present invention, after the step C, and before the step D, the method further includes the following steps:
F(步骤205)、所述计算模块105在所述判断结果为所述指纹图像中的所述坏点301的数量小于所述预定阈值的情况下，计算所述第一指纹特征信息集合与所述第二指纹特征信息集合的匹配度，并生成计算结果。F (step 205), the calculation module 105 calculates the first fingerprint feature information set and the The matching degree of the second fingerprint feature information set is calculated, and a calculation result is generated.
所述步骤D(所述步骤207)为：The step D (the step 207) is:
所述更新模块107在所述计算结果为所述匹配度大于预定阈值的情况下，将所述区别指纹特征信息添加到所述指纹特征参考模板中。The update module 107 adds the distinguishing fingerprint feature information to the fingerprint feature reference template when the calculation result is that the matching degree is greater than a predetermined threshold.
在本发明的指纹特征信息更新方法中，在所述步骤F之后，以及在所述步骤D之前，所述方法还包括以下步骤：In the fingerprint feature information update method of the present invention, after the step F, and before the step D, the method further includes the following steps:
G(步骤206)、所述比较模块106在所述计算结果为所述匹配度大于预定阈值的情况下，将所述第一指纹特征信息集合与所述第二指纹特征信息集合进行比较，以生成所述区别指纹特征信息。G (step 206), the comparison module 106 compares the first fingerprint feature information set with the second fingerprint feature information set when the calculation result is that the matching degree is greater than a predetermined threshold, so as to Generate the distinguishing fingerprint feature information.
实施例Example
本发明的技术方案举例如下：The technical scheme of the present invention is given as follows:
在用户向用户设备中输入/录入指纹时，获取用户的指纹图像。When the user inputs/enrolls the fingerprint in the user device, the fingerprint image of the user is acquired.
从所述指纹图像中提炼/提取指纹特征点。Refining/extracting fingerprint feature points from the fingerprint image.
检测所述指纹图像中是否存在坏点。Detect whether there are bad pixels in the fingerprint image.
在所述指纹图像中存在坏点的情况下，停止对所述指纹特征参考模板进行更新。In the case that there is a bad point in the fingerprint image, stop updating the fingerprint feature reference template.
在所述指纹图像中不存在坏点的情况下，对所述指纹特征参考模板进行更新。In the case that there is no bad point in the fingerprint image, the fingerprint feature reference template is updated.
将所提取的所述指纹特征点与预先存储的指纹模板的特征点进行比对操作，并生成比对结果。The extracted fingerprint feature points are compared with the feature points of the pre-stored fingerprint template, and a comparison result is generated.
在所述比对结果为所述指纹特征点与所述指纹模板匹配的情况下，评估所述指纹特征点与所述指纹模板的特征点的匹配值/匹配度。If the comparison result is that the fingerprint feature points match the fingerprint template, evaluate the matching value/degree of matching between the fingerprint feature points and the feature points of the fingerprint template.
在所述匹配度大于预定阈值的情况下，将所述指纹图像的所有指纹特征点与所述指纹模板所包含的特征点进行比较，以生成区别指纹特征信息。If the matching degree is greater than a predetermined threshold, all fingerprint feature points of the fingerprint image are compared with feature points included in the fingerprint template to generate distinguishing fingerprint feature information.
将所述区别指纹特征信息加入到所述指纹模板中。Adding the distinguishing fingerprint feature information into the fingerprint template.
通过上述技术方案，本发明能避免坏点特征更新到用于指纹识别操作指纹特征参考模板中。也就是说，在上述技术方案中，通过对坏点的检测，可以使得当坏点的数量超过一定阀值时，则停止指纹模板的更新，这样可以使得所述指纹模板里面没有坏点图像，当所述用户设备的指纹识别模块在用户使用过程中出现坏点的时候，有坏点的图像无法被更新进入所述指纹模板，所述指纹识别模块也就仍然可以保证一定的安全性，不会出现任意人都可以解开指纹的情况。Through the above-mentioned technical solution, the present invention can prevent the dead point feature from being updated into the fingerprint feature reference template used for fingerprint identification operations. That is to say, in the above-mentioned technical scheme, through the detection of dead pixels, when the number of dead pixels exceeds a certain threshold, the update of the fingerprint template is stopped, so that there is no dead pixel image in the fingerprint template, When the fingerprint identification module of the user device has a bad point during the user's use, the image with the bad point cannot be updated into the fingerprint template, and the fingerprint identification module can still guarantee a certain security. There will be situations where anyone can unlock the fingerprint.
综上所述，虽然本发明实施例揭露如上，但上述实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种改动与润饰，因此本发明的保护范围以权利要求界定的范围为准。In summary, although the embodiments of the present invention are disclosed above, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present invention. , so the protection scope of the present invention shall be determined by the scope defined in the claims.
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