Usage of library code sample for face recognition not work

Hello I Have found this library for processing for face recognition on google code p-eingenfaces. I have create a skecth for android mode from this sample: [code] // This example is based on a subset of the Face94 data set from Math-Intersect-Programming // The original data can be found here: http://code.google.com/p/math-intersect-programming/downloads/list // M-I-P's blog post on the topic can be found here: http://jeremykun.wordpress.com/2011/07/27/eigenfaces/ // Download the P-Eigenface library for Processing here: https://code.google.com/p/p-eigenface/

import cern.colt.*; import peigenface.*; import java.lang.reflect.Field;

PEigenface face;

int imgW = 180; int imgH = 200;

String[] testFilenames; String[] trainingFilenames;

PImage[] trainingImages; PImage[] eigenfaces;

PImage matchingImage; String matchingImageFilename; PImage testImage; String testImageFilename;

int mostInfluentialEigenface; PImage currentEigenface;

public void setup() { size(540, 762);

// load all the sample face images for training java.io.File trainingFolder = new java.io.File(dataPath("data/faces94/samples")); trainingFilenames = trainingFolder.list(); trainingImages = new PImage[trainingFilenames.length];

for (int i = 0; i < trainingFilenames.length; i++) { println("faces94/samples/" + trainingFilenames[i]); trainingImages[i] = loadImage("data/faces94/samples/" + trainingFilenames[i]); }

println(trainingImages.length + " training Images");

// initialize our eigenface recognizer with the training images face = new PEigenface(this); face.initEigenfaces(trainingImages);

// get our actual eigenface images // (these are the visual representation of what // is unique about each face relative to the others.) eigenfaces = getEigenfaces();

// load up our test images java.io.File folder = new java.io.File(dataPath("data/faces94/tests")); testFilenames = folder.list();

// test a new image testNewImage(); } public void draw() { image(currentEigenface, 0, 0);

image(testImage, imgW, 0); text("TEST:\n" + testImageFilename, imgW, imgH - 25);

image(matchingImage, imgW * 2, 0); text("MATCH:\n" + matchingImageFilename, imgW * 2, imgH - 25);

drawAllEigenfaces(); }

// draw the eigenfaces in a grid // with a red rectangle around the // one that makes up the principle component // for the current test image void drawAllEigenfaces() { int i = 0; int col = 0; int row = 0; while (i < eigenfaces.length) { image(eigenfaces[i], col54, imgH + row54, 54, 54);

if (i == mostInfluentialEigenface) {
  stroke(255, 0, 0);
  noFill();
  rect(col*54, imgH + row*54, 54, 54);
}

i++;
col++;
if (col > 9) {
  col = 0;
  row++;
}

} }

void testNewImage() { // load a random image from the test folder int testImageNum = int(random(0, testFilenames.length-1)); testImage = loadImage("data/faces94/tests/" + testFilenames[testImageNum]); testImageFilename = testFilenames[testImageNum];

// find the matching image for our test image from the training images int resultImageNum = face.findMatchResult(testImage, trainingImages.length); matchingImage = trainingImages[resultImageNum]; matchingImageFilename = trainingFilenames[resultImageNum];

// measure the weights: how much did each eigenface // contribute to the current test image double[] weights = face.getWeights(face.getBrightnessArray(testImage), trainingImages.length);

// find the index of the one that contributed the most // (i.e. with the max weight) double maxWeight = -10000; for(int i = 0; i < weights.length; i++){ if(weights[i] > maxWeight){ mostInfluentialEigenface = i; maxWeight = weights[i]; } } currentEigenface = eigenfaces[mostInfluentialEigenface];

}

void keyPressed() { testNewImage(); }

// This funciton gets the array of eigenface images // out of PEigenface. It is ugly because it uses some java // magic to extract a non-public variable. PImage[] getEigenfaces() { PImage[] result = new PImage[trainingImages.length]; try { Class c = face.getClass(); Field field = c.getDeclaredField("imagesEigen"); field.setAccessible(true); result = (PImage[])field.get(face); } catch(Exception e) { println(e.toString()); } return result; } [/code]

compiled for android is ok but when run i have this:

FATAL EXCEPTION: Animation Thread Process: processing.test.eigenfaces, PID: 1898 java.lang.NullPointerException: Attempt to get length of null array at processing.test.eigenfaces.eigenfaces.setup(eigenfaces.java:58) at processing.core.PApplet.handleDraw(Unknown Source) at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source) at processing.core.PApplet.run(Unknown Source) at java.lang.Thread.run(Thread.java:818)

Can some one help me ? Thanks