FaceFinder - a .NET face detection mashup

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Overview

FaceFinder is a web-based face detection system, very similar in nature to BetaFace. It allows you to upload an image file, and the faces in the picture will be marked. This is a proof-of-concept service, mashing together open source face detection software, and my PhotoNotes implementation.

Demo

Use the form below to upload a photo and detect the faces in that photo.

Implementation

FaceFinder is a mashup of the Intel OpenCV library, and my PhotoNotes javascript photo annotation script.

Using the SharperCV .NET wrapper for the OpenCV library, it was very easy to implement a simple class which takes an image file, and returns a list of rectangles representing the faces detected.

using System.Collections.Generic;
using SharperCV.Haar;
using SharperCV; 

public class FaceFinder
{         
   public List<Rectangle> GetFaces(string filePath)
   {
      List<Rectangle> rects = new List<Rectangle>();
      CvImage theImage = new CvImage(filePath);

      ClassifierCascade cc;
      cc = new ClassifierCascade("<default_face_cascade>", 
                                  new CvSize(24,24));
      HiddenClassifierCascade hc;
      hc = new HiddenClassifierCascade(cc, 
                                       null, null, null, 1);
      CvRect[] faces;
      faces = hc.DetectObjects(theImage,1.2,3,
                                       PruningFlags.CannyPruning);

      foreach(CvRect face in faces)
      {
          Rectangle rect = new Rectangle(face.x, face.y, 
                                         face.width, face.height); 
          rects.Add(rect);
      }
      return rects;
   }
}

For each face, I can then create a corresponding PhotoNote

Versions

• v1 - 6/04/2006 - Initial release - Example source code Coming Soon!

Requirements

You'll need the following two open source libraries in order to use FaceFinder.

• OpenCV - Intel's Open Source Computer Vision Library - Download here
• SharperCV- A .NET wrapper library for OpenCV - Download here

License

This library is licensed under the MIT License. You can use it for whatever you'd like, as long as the copyright notices remain in place.

SharperCV Version 1 may be freely used for non-commercial, academic, and personal use. It may not be redistributed or used as part of any commercial product.

Intel's OpenCV binary DLLs are separately subject to this licence from Intel.

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