问题
I download and test JavaFaces as a java project in Windows.
but i'am tring to use it in android framework , but BufferedImage is not available in android !
how can i make this project compatible with android ? here is FaceRec.java that contain errors about BufferedImage.
public class FaceRec {
private FaceBundle bundle;
private double[][] weights;
Handler fh;
Logger logger = Logger.getLogger("facerecognition.javafaces.FaceRec");
public FaceRec() {
try {
fh = new FileHandler("facerec.log");
fh.setFormatter(new SimpleFormatter());
logger.addHandler(fh);
}
catch (SecurityException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
}
public MatchResult findMatchResult(String imageFileName, int selectedeigenfaces, double thresholdVal) {
boolean match = false;
String message = null;
String matchingFileName = "";
double minimumDistance = 0.0;
try {
checkImageSizeCompatibility(imageFileName);
Matrix2D inputFace = getNormalisedInputFace(imageFileName);
inputFace.subtract(new Matrix2D(bundle.getAvgFace(), 1));
Matrix2D inputWts = getInputWeights(selectedeigenfaces, inputFace);
double[] distances = getDistances(inputWts);
ImageDistanceInfo distanceInfo = getMinimumDistanceInfo(distances);
minimumDistance = Math.sqrt(distanceInfo.getValue());
matchingFileName = getMatchingFileName(distanceInfo);
if (minimumDistance > thresholdVal) {
message = "no match found, try higher threshold";
} else {
match = true;
message = "matching image found";
}
}
catch (Exception e) {
return new MatchResult(false, "", Double.NaN, e.getMessage());
}
return new MatchResult(match, matchingFileName, minimumDistance, message);
}
private void checkImageSizeCompatibility(String fileName) throws IOException, FaceRecError {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
Bitmap bitmap = BitmapFactory.decodeFile(fileName, options);
int height = bitmap.getHeight();
int width = bitmap.getHeight();
int facebundleWidth = this.bundle.getImageWidth();
int facebundleHeight = this.bundle.getImageHeight();
if ((height != facebundleHeight) || (width != facebundleWidth)) {
throw new FaceRecError("selected image dimensions does not match dimensions of other images");
}
}
private String getMatchingFileName(ImageDistanceInfo distanceInfo) {
List<String> imageFileNames = this.bundle.getImageFileNamesList();
String matchingFileName = imageFileNames.get(distanceInfo.getIndex());
return matchingFileName;
}
private Matrix2D getInputWeights(int selectedeigenfaces, Matrix2D inputFace) {
double[][] eigenFacesArray = this.bundle.getEigenFaces();
Matrix2D eigenFacesMatrix = new Matrix2D(eigenFacesArray);
Matrix2D eigenFacesMatrixPart = eigenFacesMatrix.getSubMatrix(selectedeigenfaces);
Matrix2D eigenFacesMatrixPartTranspose = eigenFacesMatrixPart.transpose();
Matrix2D inputWts = inputFace.multiply(eigenFacesMatrixPartTranspose);
return inputWts;
}
private Matrix2D getNormalisedInputFace(String imageFileName) throws FaceRecError {
double[] inputFaceData = getImageData(imageFileName);
Matrix2D inputFace = new Matrix2D(inputFaceData, 1);
//logger.info("inputface");
//logger.info(inputFace.toString());
inputFace.normalise();
//logger.info("normalised inputface");
//logger.info(inputFace.toString());
return inputFace;
}
private ImageDistanceInfo getMinimumDistanceInfo(double[] distances) {
double minimumDistance = Double.MAX_VALUE;
int index = 0;
for (int i = 0; i < distances.length; i++) {
if (distances[i] < minimumDistance) {
minimumDistance = distances[i];
index = i;
}
}
return new ImageDistanceInfo(distances[index], index);
}
private double[] getDistances(Matrix2D inputWt) {
Matrix2D tempWt = new Matrix2D(this.weights);
double[] inputWtData = inputWt.flatten();
tempWt.subtractFromEachRow(inputWtData);
tempWt.multiplyElementWise(tempWt);
double[][] temp = tempWt.toArray();
double[] distances = new double[temp.length];
for (int i = 0; i < temp.length; i++) {
double sum = 0.0;
for (int j = 0; j < temp[0].length; j++) {
sum += temp[i][j];
}
distances[i] = sum;
}
return distances;
}
private double[] getImageData(String imageFileName) throws FaceRecError {
BufferedImage bi = null;
double[] inputFace = null;
try {
bi = ImageIO.read(new File(imageFileName));
}
catch (IOException ioe) {
throw new FaceRecError(ioe.getMessage());
}
if (bi != null) {
int imageWidth = bi.getWidth();
int imageHeight = bi.getHeight();
inputFace = new double[imageWidth * imageHeight];
bi.getData().getPixels(0, 0, imageWidth, imageHeight, inputFace);
}
return inputFace;
}
private void doCalculations(String dir, List<String> imglist, int selectedNumOfEigenFaces) throws FaceRecError, IOException {
FaceBundle b = createFaceBundle(imglist);
double[][] wts = calculateWeights(b, selectedNumOfEigenFaces);
this.bundle = b;
this.weights = wts;
writeCache(dir, b);
}
private double[][] calculateWeights(FaceBundle b, int selectedNumOfEigenFaces) {
Matrix2D eigenFaces = new Matrix2D(b.getEigenFaces());
Matrix2D eigenFacesPart = eigenFaces.getSubMatrix(selectedNumOfEigenFaces);
Matrix2D adjustedFaces = new Matrix2D(b.getAdjustedFaces());
Matrix2D eigenFacesPartTr = eigenFacesPart.transpose();
Matrix2D wts = adjustedFaces.multiply(eigenFacesPartTr);
return wts.toArray();
}
public FaceBundle createFaceBundle(List<String> filenames) throws FaceRecError, IOException {
BufferedImage[] bufimgs = getGrayScaleImages(filenames);
checkImageDimensions(filenames, bufimgs);
Matrix2D imagesData = getNormalisedImagesData(bufimgs);
double[] averageFace = imagesData.getAverageOfEachColumn();
imagesData.adjustToZeroMean();
//logger.info("imagesData adjusted ToZeroMean");
//logger.info(imagesData.toString());
EigenvalueDecomposition egdecomp = getEigenvalueDecomposition(imagesData);
double[] eigenvalues = egdecomp.getEigenValues();
double[][] eigvectors = egdecomp.getEigenVectors();
//logger.info("eigenvalues");
//logger.info(new Matrix2D(eigenvalues,1).toString());
//logger.info("eigvectors");
//logger.info(new Matrix2D(eigvectors).toString());
TreeSet<ValueIndexPair> pairList = getSortedPairs(eigenvalues, eigvectors);
eigenvalues = getSortedVector(pairList);
eigvectors = getSortedMatrix(eigvectors, pairList);
//logger.info("AFTER SORTING");
//logger.info("eigenvalues");
//logger.info(new Matrix2D(eigenvalues,1).toString());
//logger.info("eigvectors");
//logger.info(new Matrix2D(eigvectors).toString());
Matrix2D eigenFaces = getNormalisedEigenFaces(imagesData, new Matrix2D(eigvectors));
int imageWidth = bufimgs[0].getWidth();
createEigenFaceImages(eigenFaces, imageWidth);
int imageHeight = bufimgs[0].getHeight();
FaceBundle b = new FaceBundle(filenames, imagesData.toArray(), averageFace, eigenFaces.toArray(), eigenvalues, imageWidth, imageHeight);
return b;
}
public double[] getSortedVector(TreeSet<ValueIndexPair> pairSet) {
double[] sortedVector = new double[pairSet.size()];
ValueIndexPair[] viArray = pairSet.toArray(new ValueIndexPair[0]);
for (int i = 0; i < pairSet.size(); i++) {
sortedVector[i] = viArray[i].getVectorElement();
}
return sortedVector;
}
public double[][] getSortedMatrix(double[][] origmatrix, TreeSet<ValueIndexPair> pairSet) {
int rows = pairSet.size();
int cols = origmatrix[0].length;
double[][] sortedMatrix = new double[rows][cols];
ValueIndexPair[] viArray = pairSet.toArray(new ValueIndexPair[0]);
//fill a 2D array using data from rows of original matrix
for (int i = 0; i < pairSet.size(); i++) {
sortedMatrix[i] = origmatrix[viArray[i].getMatrixRowIndex()];
}
return sortedMatrix;
}
public TreeSet<ValueIndexPair> getSortedPairs(double[] aVector,
double[][] aMatrix) {
TreeSet<ValueIndexPair> pairSet = createPairs(aVector, aMatrix);
return pairSet;
}
public TreeSet<ValueIndexPair> createPairs(double[] aVector, double[][] aMatrix) {
TreeSet<ValueIndexPair> pList = null;
if (aVector.length != aMatrix.length) {
printError("matrix rows don't match items in vector ");
} else {
pList = new TreeSet<ValueIndexPair>();
for (int i = 0; i < aVector.length; i++) {
ValueIndexPair dp = new ValueIndexPair(aVector[i], i);
pList.add(dp);
}
}
return pList;
}
private EigenvalueDecomposition getEigenvalueDecomposition(
Matrix2D imagesData) {
Matrix2D imagesDataTr = imagesData.transpose();
Matrix2D covarianceMatrix = imagesData.multiply(imagesDataTr);
EigenvalueDecomposition egdecomp = covarianceMatrix.getEigenvalueDecomposition();
return egdecomp;
}
public void createEigenFaceImages(Matrix2D eigenfaces, int imgwidth) throws IOException {
logger.info("creating eigenfaces");
double[][] eigenfacesArray = eigenfaces.toArray();
String fldrname = ".." + File.separator + "eigenfaces";
makeNewFolder(fldrname);
String prefix = "eigen";
String ext = ".png";
for (int i = 0; i < eigenfacesArray.length; i++) {
double[] egface = eigenfacesArray[i];
String filename = fldrname + File.separator + prefix + i + ext;
createImageFromArray(filename, egface, imgwidth);
}
logger.info("created eigenfaces.");
}
private Matrix2D getNormalisedEigenFaces(Matrix2D imagesData, Matrix2D eigenVectors) {
Matrix2D eigenFaces = eigenVectors.multiply(imagesData);
double[][] eigenFacesData = eigenFaces.toArray();
for (int i = 0; i < eigenFacesData.length; i++) {
double norm = Matrix2D.norm(eigenFacesData[i]);
for (int j = 0; j < eigenFacesData[i].length; j++) {
double v = eigenFacesData[i][j];
eigenFacesData[i][j] = v / norm;
}
}
return new Matrix2D(eigenFacesData);
}
private Matrix2D getNormalisedImagesData(BufferedImage[] bufImgs) {
int imageWidth = bufImgs[0].getWidth();
int imageHeight = bufImgs[0].getHeight();
int rows = bufImgs.length;
int cols = imageWidth * imageHeight;
double[][] data = new double[rows][cols];
for (int i = 0; i < rows; i++) {
bufImgs[i].getData().getPixels(0, 0, imageWidth, imageHeight, data[i]);
}
Matrix2D imagesData = new Matrix2D(data);
//logger.info("images before normalisation");
//logger.info(imagesData.toString());
imagesData.normalise();
//logger.info("images normalised");
//logger.info(imagesData.toString());
return imagesData;
}
private void checkImageDimensions(List<String> filenames,
BufferedImage[] bufimgs) throws FaceRecError {
int imgheight = 0;
int imgwidth = 0;
for (int i = 0; i < bufimgs.length; i++) {
if (i == 0) {
imgheight = bufimgs[i].getHeight();
imgwidth = bufimgs[i].getWidth();
}
if ((imgheight != bufimgs[i].getHeight()) || (imgwidth != bufimgs[i].getWidth())) {
String response = "all images should have same dimensions! " + filenames.get(i) + " is of diff size";
logger.log(Level.SEVERE, response);
throw new FaceRecError(response);
}
}
}
public BufferedImage[] getGrayScaleImages(List<String> filenames) throws FaceRecError {
BufferedImage b = null;
BufferedImage[] bufimgs = new BufferedImage[filenames.size()];
Iterator<String> it = filenames.iterator();
int i = 0;
while (it.hasNext()) {
String fn = it.next();
File f = new File(fn);
if (f.isFile()) {
try {
b = ImageIO.read(new File(fn));
}
catch (IOException ioe) {
throw new FaceRecError(ioe.getMessage());
}
if (b != null) {
b = convertToGray(b);
bufimgs[i++] = b;
}
}
}
return bufimgs;
}
private BufferedImage convertToGray(BufferedImage img) throws FaceRecError {
BufferedImage gray = null;
try {
gray = new BufferedImage(img.getWidth(), img.getHeight(),
BufferedImage.TYPE_BYTE_GRAY);
ColorConvertOp op = new ColorConvertOp(
img.getColorModel().getColorSpace(),
gray.getColorModel().getColorSpace(), null);
op.filter(img, gray);
return gray;
}
catch (Exception e) {
logger.log(Level.SEVERE, "grayscale conversion failed", e);
throw new FaceRecError("grayscale conversion failed:\n" + e.getMessage());
}
}
private void writeCache(String dir, FaceBundle cachedata) throws IOException {
FileOutputStream fout = null;
ObjectOutputStream fos = null;
fout = new FileOutputStream(dir + File.separator + "mycache.cache");
fos = new ObjectOutputStream(fout);
fos.writeObject(cachedata);
logger.info("wrote cache");
//fos.close();
fout.close();
}
private FaceBundle getOldFacesBundle(String dir) throws IOException, ClassNotFoundException {
FileInputStream fin = new FileInputStream(dir + File.separator + "mycache.cache");
ObjectInputStream fo = new ObjectInputStream(fin);
FaceBundle oldBundle = (FaceBundle) fo.readObject();
fo.close();
//fin.close();
return oldBundle;
}
private void validateSelectedEigenFacesNumber(int selectedNumOfEigenFaces,
List<String> newFileNames) throws FaceRecError {
int numImgs = newFileNames.size();
if (selectedNumOfEigenFaces <= 0 || selectedNumOfEigenFaces >= numImgs) {
logger.log(Level.SEVERE, "incorrect number of selectedeigenfaces" + selectedNumOfEigenFaces + "used" + "allowed btw 0-" + numImgs);
throw new FaceRecError("incorrect number of selectedeigenfaces used..\n use a number between 0 and upto " + (numImgs - 1));
}
}
private List<String> getFileNames(String dir, String[] children) {
java.util.List<String> imageFileNames = new java.util.ArrayList<String>();
for (String i: children) {
String fileName = dir + File.separator + i;
imageFileNames.add(fileName);
}
Collections.sort(imageFileNames);
return imageFileNames;
}
public List<String> parseDirectory(String directoryName, String extension) throws FaceRecError {
final String ext = "." + extension;
String[] children = null;
File directory = new File(directoryName);
if (directory.isDirectory()) {
children = directory.list(new FilenameFilter() {
@Override
public boolean accept(File f, String name) {
return name.endsWith(ext);
}
});
} else {
throw new FaceRecError(directoryName + " is not a directory");
}
return getFileNames(directoryName, children);
}
public void checkCache(String dir, String extension, int selectedNumOfEigenFaces) throws FaceRecError, IOException {
List<String> newFileNames = parseDirectory(dir, extension);
FaceBundle oldBundle = null;
try {
validateSelectedEigenFacesNumber(selectedNumOfEigenFaces, newFileNames);
oldBundle = getOldFacesBundle(dir);
processCache(dir, newFileNames, oldBundle, selectedNumOfEigenFaces);
}
catch (FileNotFoundException e) {
logger.info("cache file not found");
doCalculations(dir, newFileNames, selectedNumOfEigenFaces);
}
catch (Exception e) {
throw new FaceRecError(e.getMessage());
}
}
private void processCache(String dir, List<String> newFileNames, FaceBundle oldBundle, int selectedNumOfEigenFaces) throws FaceRecError, IOException {
List<String> oldFileNames = oldBundle.getImageFileNamesList();
if (newFileNames.equals(oldFileNames)) {
this.bundle = oldBundle;
this.weights = calculateWeights(oldBundle, selectedNumOfEigenFaces);
}
else {
logger.info("folder contents changed");
doCalculations(dir, newFileNames, selectedNumOfEigenFaces);
}
}
private void createImageFromArray(String filename, double[] imgdata, int wd) throws IOException {
BufferedImage bufimg = new BufferedImage(wd, imgdata.length / wd, BufferedImage.TYPE_BYTE_GRAY);
Raster rast = bufimg.getData();
WritableRaster wr = rast.createCompatibleWritableRaster();
double maxValue = Double.MIN_VALUE;
double minValue = Double.MAX_VALUE;
for (int i = 0; i < imgdata.length; i++) {
maxValue = Math.max(maxValue, imgdata[i]);
minValue = Math.min(minValue, imgdata[i]);
}
for (int j = 0; j < imgdata.length; j++) {
imgdata[j] = ((imgdata[j] - minValue) * 255) / (maxValue - minValue);
}
wr.setPixels(0, 0, wd, imgdata.length / wd, imgdata);
bufimg.setData(wr);
File newfile = new File(filename);
ImageIO.write(bufimg, "png", newfile);
}
private void makeNewFolder(String fldr) {
File folder = new File(fldr);
if (folder.isDirectory()) {
printError("folder:" + fldr + " exists");
deleteContents(folder);
}
else {
printError("no such folder as:" + fldr);
boolean madeFolder = folder.mkdir();
if ( !madeFolder) {
printError("could not create folder :" + fldr);
}
}
}
private void deleteContents(File f) {
File[] files = f.listFiles();
for (File i: files) {
delete(i);
}
}
private void delete(File i) {
if (i.isFile()) {
boolean deleted = i.delete();
if ( !deleted) {
printError("file:" + i.getPath() + "could not be deleted");
}
}
}
public void reconstructFaces(int selectedeigenfaces) throws IOException {
double[][] eigenfacesArray = bundle.getEigenFaces();
Matrix2D egnfacesMatrix = new Matrix2D(eigenfacesArray);
Matrix2D egnfacesSubMatrix = egnfacesMatrix.getSubMatrix(selectedeigenfaces);
double[] eigenvalues = bundle.getEigenValues();
Matrix2D eigenvalsMatrix = new Matrix2D(eigenvalues, 1);
Matrix2D eigenvalsSubMatrix = eigenvalsMatrix.transpose().getSubMatrix(selectedeigenfaces);
/*
* the term 'phi' is used to denote mean subtracted reconstructed imagedata
* since that term appears in T&P doc.The term 'xnew' denotes phi+average_image
*
**/
double[][] phi = getPhiData(egnfacesSubMatrix, eigenvalsSubMatrix);
double[][] xnew = addAverageFaceData(phi);
String reconFolderName = ".." + File.separator + "reconfaces";
String ext = ".png";
reconstructPhiImages(phi, reconFolderName, ext);
reconstructOriginalImages(xnew, reconFolderName, ext);
logger.info("reconstruction over");
}
private double[][] getPhiData(Matrix2D egnfacesSubMatrix, Matrix2D eigenvalsSubMatrix) {
double[] evalsub = eigenvalsSubMatrix.flatten();
Matrix2D tempEvalsMat = new Matrix2D(weights.length, evalsub.length);
tempEvalsMat.replaceRowsWithArray(evalsub);
Matrix2D tempmat = new Matrix2D(weights);
tempmat.multiplyElementWise(tempEvalsMat);
Matrix2D phinewmat = tempmat.multiply(egnfacesSubMatrix);
double[][] phi = phinewmat.toArray();
return phi;
}
private double[][] addAverageFaceData(double[][] phi) {
double[][] xnew = new double[phi.length][phi[0].length];
double[] avgface = bundle.getAvgFace();
for (int i = 0; i < phi.length; i++) {
for (int j = 0; j < phi[i].length; j++) {
xnew[i][j] = phi[i][j] + avgface[j];
}
}
return xnew;
}
private void reconstructOriginalImages(double[][] xnew, String reconFolderName, String ext) throws IOException {
String prefix;
prefix = "xnew";
int imgwidth = bundle.getImageWidth();
for (int i = 0; i < xnew.length; i++) {
double[] xnewdata = xnew[i];
String filename = reconFolderName + File.separator + prefix + i + ext;
createImageFromArray(filename, xnewdata, imgwidth);
}
}
private void reconstructPhiImages(double[][] phi, String reconFolderName, String ext) throws IOException {
int imgwidth = bundle.getImageWidth();
makeNewFolder(reconFolderName);
String prefix = "phi";
for (int i = 0; i < phi.length; i++) {
double[] phidata = phi[i];
String filename = reconFolderName + File.separator + prefix + i + ext;
createImageFromArray(filename, phidata, imgwidth);
}
}
private int getNumofFacesVal(String numofFaces) throws NumberFormatException {
return new Integer(numofFaces).intValue();
}
private double getThresholdVal(String threshold) throws NumberFormatException {
return new Double(threshold).doubleValue();
}
private void validateSelectedImageFileName(String faceimagename) throws FaceRecError {
if ((faceimagename.length() == 0) || ( !isImage(faceimagename))) {
throw new FaceRecError("select an imagefile");
}
}
private boolean isImage(String imagefilename) {
try {
return Utils.isImageFile(imagefilename);
}
catch (IOException e) {
e.printStackTrace();
return false;
}
}
private void validateSelectedFolderName(String foldername) throws FaceRecError {
if (foldername.length() == 0) {
throw new FaceRecError("select a folder");
}
}
public MatchResult processSelections(String faceImageName, String directory, String numofFaces, String threshold) {
MatchResult result = null;
int numFaces = 0;
double thresholdVal = 0.0;
try {
validateSelectedImageFileName(faceImageName);
validateSelectedFolderName(directory);
numFaces = getNumofFacesVal(numofFaces);
thresholdVal = getThresholdVal(threshold);
String extension = getFileExtension(faceImageName);
checkCache(directory, extension, numFaces);
reconstructFaces(numFaces);
result = findMatchResult(faceImageName, numFaces, thresholdVal);
}
catch (Exception e) {
result = new MatchResult(false, null, Double.NaN, e.getMessage());
}
return result;
}
public static String getFileExtension(String filename) {
String ext = "";
int i = filename.lastIndexOf('.');
if (i > 0 && i < filename.length() - 1) {
ext = filename.substring(i + 1).toLowerCase();
}
return ext;
}
public static void printError(String msg) {
System.err.println(msg);
}
public static void debug(String msg) {
System.out.println(msg);
}
public static void startMatcher(String imgToCheck, String imgDir, ResultListener listener) {
long start = System.currentTimeMillis();
String numFaces = "4";
String thresholdVal = "2";
MatchResult r = new FaceRec().processSelections(imgToCheck, imgDir, numFaces, thresholdVal);
long end = System.currentTimeMillis();
double takenTime = (end - start) / 1000.0;
if (r.getMatchSuccess()) {
listener.onSuccess(new File(r.getMatchFileName()), r.getMatchDistance(), takenTime);
} else {
listener.onFailed(takenTime);
}
}
}
and here is list of methods that are not usable because of BufferedImage
getImageData
createFaceBundle
getNormalisedImagesData
checkImageDimensions
getGrayScaleImages
convertToGray
createImageFromArray
回答1:
BufferedImage isn't supported by Android,it belongs to the AWT package.Here's a similar question that can help you: Similar Question
Feel free to ask for further information :)
来源：https://stackoverflow.com/questions/27483541/using-javafaces-in-android