Questions tagged [fingerprint]

Biometric modality that matches images of finger tips.

In forensic science, fingerprint identification is the analytical process of comparing two instances of friction ridge skin impressions from human fingers for identity verification. However, this technology may also work on almost any other region of skin on the human body.

In cybersecurity applications, a fingerprinting algorithm is a procedure that maps an arbitrarily large data item (such as a computer file) to a much shorter bit string, its fingerprint, which uniquely identifies the original data for all practical purposes. This is similar in the real-world case just as human fingerprints uniquely identify people. This digital fingerprint may be used for data deduplication purposes and data integrity verification.

A digital fingerprint may also refer to the pieces of information that are created by an individual during the use of some system. This can include cookies, inputs, selected options, etc. which can all be used to track a user's behavior and record any events.

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Fingerprint event capturing using javaApi?

Hi I have a javaAPi for the capturing events from the finger Print machine,I am connected the machine by using TCP. I am not understanding how to capture events from the machine continually using xmlevent handler. This API will have these…
user3511026
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Integrate a fingerprinter in web application C#

I am developing a web application in C# with VS 2012. I have a fingerprinter which contains SDK in Windows Forms format, but my project is web. I can communicate the windows forms project with the web project, so I can open and close the…
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Run asmx web service on STA

I am developing a web application with C# in VS 2012. I need to execute a Web Service in STAThread mode (because I have a fingerprint sensor which works in Windows Forms). I found this article. I have implemented the class of figure 4 and change…
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Setting a method of web form to STAThread

I am developing a web application in C# with VS 2012. I have a fingerprint sensor with his dll in Windows Forms format. I am developing a web application, so I need to communicate the two projects. But the fingerprint sensor needs an STAThread…
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Using inbuilt Fingerprint Scanner .NET

I am making an application and I wanted to ask if I can interface the inbuilt fingerprint scanner (of a HP laptop) in my .NET application
Coder Guy
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Add fingerprint to old paperclip attachments

I use paperclip for the attachments on my models. I've recently added a fingerprint to the attachments, it works fine with the new attachments but it ws not added to the old ones, because of this I'm having trouble reprocessing attachments to add a…
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How Do I Find A Specific Image From My Database

private void button1_Click(object sender, EventArgs e) { SqlConnection cn = new SqlConnection(@"Data Source=SAZ-PC\SQLEXPRESS;Initial Catalog=Voted;Integrated Security=True"); SqlCommand cmd1 = new SqlCommand("select FINGERPRINT from Regdmem…
Legend
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What does the gradient from Sobel mean?

I have the gradients from the Sobel operator for each pixel. In my case 320x480. But how can I relate them with the orientation? For an example, I'm planning to draw an orientation map for fingerprints. So, how do I start? Is it by dividing the…
user3396218
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Biometric Template cannot save in MySQL database because it is null

I searched and tried some codes to save the enrolled fingerprints from the scanner but my error was "id and FP couldn't be null". I know that there is something wrong with the codes i used. I am using OTW SDK of Digital Persona. VB.net as…
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Try Catch Block doesn´t work with Secugen Fingerprint

I'm working on a fingerprint recognition software on c#, WPF Visual Studio 2012, I'm using secugen hamster to take the fingerprints, the software is all done, I can register the fingerprints correctly to the database and succesfull retrieve and…
RaizenD1
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How to plot field orientation map? I have the gradients. OpenCV C++

I used the Scharr filter and I have the x and y gradients from here. May I know how I can plot the orientation map from here? Here's the picture of my Scharr filter result. It's a fingerprint image. And this is the code i used. Mat src,grad; Mat…
user3396218
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Can't convert retrieved fingerprint template from SQL Server

I have already retrieved the bytes of arrays stored in a SQL Server database for verification purposes. The problem is, when I convert from Base64String this error message shows up. The input is not a valid Base-64 string as it contains a non-base…
heyitsmarcucu
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How to rotate block in matlab?

Without use of Image processing toolbox to divide the image, I used cell array. If I want to rotate each block I should develope imrotate, but how? working with cell is not easy. Here is my code for division: A=…
user3269865
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How to store fingerprint template to sql server

I am having trouble in storing fpt templates in SQL Server. Here is my code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using…
Marcus Ang
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Load ftrscanapi.dll in vb.net application

I am trying to integrate the ftrscaniapi.dll file in my vb.net application that help in reading the fingerprint from the Futronic FS80 device. But I am getting error as "Please make sure that the file is accessible, and that it is valid assembly or…
Vick
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