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lirec:faceident [2009-03-30 13:54] – davegriffithslirec:faceident [2009-05-27 10:50] (current) – davegriffiths
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 ======FaceIdent====== ======FaceIdent======
  
-A simple approach to face identification, built on top of OpenCV and given a YARP network interface.+See also [[FaceIdent dev log]]
  
-Source code: [[http://svn.lirec.eu/foam/trunk/simple-faceident/]]+A simple approach to face identification, built on top of OpenCV and given a  
 +YARP network interface. 
 + 
 +The program has two modes of operation. The first is calibration, where each user 
 +must show their face to the camera separately - press the number keys to assign  
 +each user with a different ID. You can see which face is mapped to which ID at  
 +the bottom of the window.  
 + 
 +The second mode of operation is face detection, where each visible detected face 
 +is given an ID based on it's closest match (within a given error threshold) with  
 +the faces recorded during calibration. The boxes drawn around the faces display  
 +the id and the confidence value of the match. When in this mode the program sends  
 +the following YARP messages:
  
 ^ Port ^ Bottle contents ^ Meaning ^ ^ Port ^ Bottle contents ^ Meaning ^
 | /faceident | "user appeared" ID confidence | A user has entered the view of the camera | | /faceident | "user appeared" ID confidence | A user has entered the view of the camera |
 | /faceident | "user disappeared" ID | The user has left the camera view | | /faceident | "user disappeared" ID | The user has left the camera view |
 +
 +You can also drive the program via yarp with the following input messages:
 +
 +^ Input port ^ Bottle contents ^ Meaning ^
 +| /faceident-ctrl | "train" ID | Train for this user |
 +| /faceident-ctrl | "detect" | Switch to detection mode |
 +| /faceident-ctrl | "save" sessionname | Save the detected faces  |
 +| /faceident-ctrl | "load" sessionname | Load previously detected faces  |
 +| /faceident-ctrl | "clear" | Clears all faces |
 +| /faceident-ctrl | "idle" | Switch to idle mode, mostly frees up cpu |
 +
 +Faces are saved in png format along with a text file to map them to id numbers. The sessionname 
 +will be prepended onto the filenames for the text file and the image files, so you can save 
 +multiple sessions.
 +
 +Keys:
 +
 +^ Key ^ Meaning ^
 +| 0-9 number keys | Calibrate a given id against a face in the scene |
 +| d | Start detect mode, which will send YARP messages |
 +| c | Clear all faces in the database |
 +
 +Requires: OpenCV, YARP
 +
 +Written and tested on Linux, but it should work in Windows too.
 +At the moment you'll probably have to run it with:
 +
 +simple-faceident --cascade=/path/to/haarcascade_frontalface_alt.xml
 +
 +In order to find OpenCV's data, on my machine it's in:
 +/usr/local/share/opencv/haarcascades/haarcascade_frontalface_alt.xml
 +
 +Todo:
 +  * Try normalised cross correlation instead of image differencing
 +  * Expose image size and error threshold via yarp
 +  * Use tinyxml or something better for the serialisation
 +
 +Source code: [[http://svn.lirec.eu/foam/trunk/simple-faceident/]]
 +
 +

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