Capture and compare finger print image

Question

I\'m developing an attendance management system using finger print recognition. So what i want is comparing the two bmp images those are generated by the scanner. I\'ve hea

Answer 1

It will take forever if you start from scratch. I used Griaule Biometrics 4 years ago making this project. It worked like a charm. Add a reference to the necessary DLL to operate the fingerprint scanner.

Answer 2

I think you are looking for :

https://github.com/cameronmcefee/Image-Diff-View-Modes/commit/8e95f70c9c47168305970e91021072673d7cdad8

For Simple Approach:

   1: private bool ImageCompareArray(Bitmap firstImage, Bitmap secondImage) 
   2: {
   3:     bool flag = true;
   4:     string firstPixel;
   5:     string secondPixel;
   6:  
   7:     if (firstImage.Width == secondImage.Width 
   8:         && firstImage.Height == secondImage.Height)
   9:     {
  10:         for (int i = 0; i < firstImage.Width; i++)
  11:         {
  12:             for (int j = 0; j < firstImage.Height; j++)
  13:             {
  14:                 firstPixel = firstImage.GetPixel(i, j).ToString();
  15:                 secondPixel = secondImage.GetPixel(i, j).ToString();
  16:                 if (firstPixel != secondPixel)
  17:                 {
  18:                     flag = false;
  19:                     break;
  20:                 }
  21:             }
  22:         }
  23:  
  24:         if (flag == false)
  25:         {
  26:             return false;
  27:         }
  28:         else
  29:         {
  30:             return true;
  31:         }
  32:     }
  33:     else
  34:     {
  35:         return false;
  36:     }
  37: }

Also see : http://blogs.msdn.com/b/domgreen/archive/2009/09/06/comparing-two-images-in-c.aspx

Answer 3

You don't want to develop this from scratch, you want something like the Digital Persona Software Development Kit.

There are others, but that's the one I was using tonight :)

There's also this question: Opensource or Free Fingerprint Reader SDK.

Edited to add:

If you can't use the NITGEN SDK, then you're probably not going to succeed in your project. When you compare 'fingerprints', you're not actually comparing the images, you're comparing lists of key points (indicia) extracted from the images.