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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DFT in openCV for ridge frequency estimation

In order to estimate the ridge frequency in a bloc of (32,16) pixels I'm using the DFT of opencv : (where _frq is a vector that represents the sum of column of the bloc ..It has a sinosoide values form ) cv::Scalar _mfrq= cv::mean(_frq); …
Tuc.Toc
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Delegate could not be found

It has been a week, and i'm still stuck at this error, I am using the sample application files and integrate it with mine. The exception thrown is this: "Error 1 The type or namespace name 'Function' could not be found (are you missing a using…
Marcus Ang
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Inserting Finger Print Data To SQLServer 2008

I am Trying To Insert Finger Print Data From My Form to the DataBase but i Got the Following Exception, com.microsoft.sqlserver.jdbc.SQLServerException: String or binary data would be truncated. at…
Adnan Ahmad Khan
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Madcreator Rabinfingerprint command line vs java/scala program

I'm using Madcreator's Rabinfingerprint java library in a scala program, https://github.com/themadcreator/rabinfingerprint. Using the command line I generate an irreducible 53 degree polynomial: java -jar rabinfingerprint.jar -polygen…
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Image Transmit to Intermec PM4i printer and then Print

I'm using Fingerprint to upload and then print image with pcx format. Step1 Upload image to printer using TCP port, I use command : IMAGE LOAD "bigfoot.1",1746,""\r\n The printer returns with message "OK". And then I send bytes data of bigfoot.1…
Andy Fong
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Unique Identification of a particular device type

Win32_PnPEntity class has so many properties but I want to know that is there any property which identifies the type of device uniquely . For example I have a fingerprint scanner device and its device id is something like this "USB\VID_0A86" but as…
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BioMetric FingerPrint

I am using ZKFinger SDK2.3.3.1 version and Device Communication Protocol SDK(32Bit Ver6.2.4.1 -- DLL Version : zkemkeeper.dll - 6.2.4.1. I have a small USB fingerprint scanner. When I scan the fingerprint, I get an array of bytes . I saved it…
Priya
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How to save an array of unsigned char to MySQL

Any idea on how to save an array of unsigned char to a field in MySQL database ? I'm considering BLOB, but how can I convert it to QByteArray and convert it back to an array of unsigned char when I want to ? BTW, I'm trying to save fingerprint data.
Amree
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php exec not working well when call c# .exe which using fingerprint device

I'm currently build an fingerprint attendance application web based with PHP. Application will installed on Windows 7. Currently I'm using Xampp 1.7.7 I understand that PHP can't access fingerprint since it server based, so I build C# apps to call…
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How to access the finger print driver

Can I access my laptop finger print driver using Java? I am using Fedora as my OS ? Are there any supporting libraries available for java to doing this or Can i do this with C/C++ languages?
Malintha
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Fingerprint Image Binarization

I have an finger print scanner application which takes finger image data from device. Now I am trying to binarize the image. I am Using the Otsu's algorithm to binarize the image i.e. pixel's values either 0 or 255. Threshold is calculated around…
code_fish
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Finger Print recognition system

i m using vs2008 and SourceAFIS 1.1 i m unable to access any of the methods may someone help me getting started they(SourceAFIS) gave us the following sample as Program.cs i want to develope an application which firstly Enrolls users and then…
codemirror
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Finger print on ASP.NET VB

is there a way to use finger print scanner on ASP.NET project? If yes, can someone provide me a sample codes or project solutions. this device will be used in log in system for a website. also, I would really appreciate if you can breakdown the…
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Verification Fingerprint (DigitalPersona - FingerPrint) in Delphi ActiveX component

How to use DPFPVerification class in Delphi, because it become error 'undeclare identifier' even if already import activeX control (DigitalPersona One Touch for Windows Control 1.0, it will install class TDPFPVerificationControl and…
goggle pink
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VB .net Fingerprint Verification -- Object reference not set to an instance of an object

I am having problem in the fingerprint verification using vb .net 2010. Sql statement was able to retrieve the value and was able to convert bytes to template. error says the templa8 is not set. error starts at Verificator.Verify(features,…
jetzky
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