biometrics

问题 I have constructed a GMM-UBM model for the speaker recognition purpose. The output of models adapted for each speaker some scores calculated by log likelihood ratio. Now I want to convert these likelihood scores to equivalent number between 0 and 100. Can anybody guide me please? 回答1: There is no straightforward formula. You can do simple things like prob = exp(logratio_score) but those might not reflect the true distribution of your data. The computed probability percentage of your samples

问题 I have ZKTeco Biometrics device which is connected with a C# windows application using This tutorial (C# ZKTeco Biometric Device Getting Started). It is working fine but after sometime, my application becoming failed to ping the device. As below code suggested, I am trying to ping the device after every 25 seconds. private void TimerCheckPingAndCloseAttendanceForm() { timerCheckPingAndCloseAttendanceForm = new Timer(); timerCheckPingAndCloseAttendanceForm.Tick += new EventHandler

问题 Is there any possible way to connect fingerprint biometric device to the website..? I have created a web-based ERP system. As per the client requirement, I need to integrate fingerprint logging system. My website was developed with C# and angular2. I have tried many sdks but nothing works as I expected. 回答1: Fingerprint scanners with Web API for interacting from the web page is not provided by the manufacturers. There are some 3rd party vendors providing the APIs for the same under payable

问题 I am using the new BiometricPrompt API in Android P (API 28) in my application. (I am actually using it inside a wrapper based on this project so that it functions on older devices too, but that is not relevant to the question.) This is working very well on all devices I have tested, except for the Samsung S9 with face unlock. Even though the stock Android version of BiometricPrompt currently only implements fingerprint authentication, Samsung appears to have extended it to support Face

问题 I am using iso 19794-2 fingerprint data format. All the data are in the iso 19794-2 format. I have more than hundred thousand fingerprints. I wish to make efficient search to identify the match. Is it possible to construct a binary tree like structure to perform an efficient(fastest) search for match? or suggest me a better way to find the match. and also suggest me an open source api for java to do fingerprint matching. Help me. Thanks. 回答1: Do you have a background in fingerprint matching?

问题 I am using iso 19794-2 fingerprint data format. All the data are in the iso 19794-2 format. I have more than hundred thousand fingerprints. I wish to make efficient search to identify the match. Is it possible to construct a binary tree like structure to perform an efficient(fastest) search for match? or suggest me a better way to find the match. and also suggest me an open source api for java to do fingerprint matching. Help me. Thanks. 回答1: Do you have a background in fingerprint matching?

问题 Hy friends I had developing a application to fetch data from a biometric fingerprint machine but when I run it in VS2010 its complete build sucessfully and then gives an error System.InvalidOperationException was unhandled Message="An error occurred creating the form. See Exception.InnerException for details. The error is: Retrieving the COM class factory for component with CLSID {00853A19-BD51-419B-9269-2DABE57EB61F} failed due to the following error: 80040154." Source="CardManagement"

问题 Hy friends I had developing a application to fetch data from a biometric fingerprint machine but when I run it in VS2010 its complete build sucessfully and then gives an error System.InvalidOperationException was unhandled Message="An error occurred creating the form. See Exception.InnerException for details. The error is: Retrieving the COM class factory for component with CLSID {00853A19-BD51-419B-9269-2DABE57EB61F} failed due to the following error: 80040154." Source="CardManagement"

问题 Hy friends I had developing a application to fetch data from a biometric fingerprint machine but when I run it in VS2010 its complete build sucessfully and then gives an error System.InvalidOperationException was unhandled Message="An error occurred creating the form. See Exception.InnerException for details. The error is: Retrieving the COM class factory for component with CLSID {00853A19-BD51-419B-9269-2DABE57EB61F} failed due to the following error: 80040154." Source="CardManagement"

问题 Background: I have connected a window form application with a bio-metric attendance machine (ZKTeco K20 Model). It has connected but there is an issue with OnDisconncted event. I have this code snippet, here onDisconnected event is registered but unfortunately, it is not triggering (whenever i switched off the device or unplug network cable). public bool Connect_Net(string IPAdd, int Port) { if (objCZKEM.Connect_Net(IPAdd, Port)) { //65535, 32767 //if (objCZKEM.RegEvent(1, 32767))//old if