threr is no contrib files

[leafgrey]

dose not contain OpenCV's extra modules

[kamilszewc]

Hi @leafgrey, what modules would you like to have? There may be a small difference between operating systems since the compilation procedure of native libraries was different. Give more information, please.

[leafgrey]

hello @kamilszewc ，thx for your reply，

我想使用 java opencv 做一个能够使用人脸认证身份得程序
我自己编译了多次,只得到了jar文件,无法得到正确的 dll(win)和so(linux)文件,我编译得到的dll文件和so文件只有2.77MB,但是官方给的文件有103MB,
这里有一份 示例代码,但是它并不能正常运行,我感觉是因为 opencv_java470.dll 中并不包含 opencv_contrib 中的文件

I want to use Java OpenCV to build a program that can use facial authentication for identity authentication.
I have compiled times by myself and only obtained the jar file, unable to obtain the correct DLL (win) and SO (Linux) files.
The DLL and SO files I compiled were only 2.77MB, but the official(org.opencv) provided DLL was 103MB,
Here is an example code, but it does not run well. I think that it is because there is no opencv_contrib modules in opencv_java470.dll.

demo code:

static {
  System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
}
public static void main(String[] args) {
  // 1. 加载人脸识别模型,并初始化人脸检测器和特征提取器.
  String faceCascadePath = "path/to/haarcascade_frontalface_default.xml";
  CascadeClassifier faceDetector = new CascadeClassifier(faceCascadePath);
  LBPHFaceRecognizer faceRecognizer = LBPHFaceRecognizer.create();
  // 2. 加载已知人脸图像,提取其特征向量.
  String faceImgBase = "E:\\test_opencv\\face\\";
  String knownFaceImagePath = faceImgBase + "1.jpg";
  Mat knownFaceImage = Imgcodecs.imread(knownFaceImagePath);
  Mat knownFaceFeatures = extractFaceFeatures(faceDetector, knownFaceImage);
  // 3. 获取待认证人脸图像,提取其特征向量.
  String faceToAuthenticatePath = faceImgBase + "2.jpg";
  Mat faceToAuthenticate = Imgcodecs.imread(faceToAuthenticatePath);
  Mat faceToAuthenticateFeatures = extractFaceFeatures(faceDetector, faceToAuthenticate);
  // 4. 对比待认证人脸特征向量与已知人脸特征向量,计算相似度.
  double similarity = compareFaceFeatures(faceRecognizer, knownFaceFeatures, faceToAuthenticateFeatures);
  // 5. 根据相似度判断是否认证成功.
  System.out.println("相似度: " + similarity);
}
private static Mat extractFaceFeatures(CascadeClassifier faceDetector, Mat image) {
  Mat grayImage = new Mat();
  Imgproc.cvtColor(image, grayImage, Imgproc.COLOR_BGR2GRAY);
  Imgproc.equalizeHist(grayImage, grayImage);
  MatOfRect faces = new MatOfRect();
  faceDetector.detectMultiScale(grayImage, faces, 1.1, 2, 0, new Size(30, 30), new Size());
  Rect[] facesArray = faces.toArray();
  if (facesArray.length == 0) {
    throw new RuntimeException("face not found");
  }
  Rect faceRect = facesArray[0];
  Mat faceROI = grayImage.submat(faceRect);
  Mat resizedFace = new Mat();
  Imgproc.resize(faceROI, resizedFace, new Size(100, 100));
  return resizedFace;
}
private static double compareFaceFeatures(LBPHFaceRecognizer faceRecognizer, Mat knownFaceFeatures, Mat faceToAuthenticateFeatures) {
  faceRecognizer.train(Arrays.asList(knownFaceFeatures), new Mat(1, 1, CvType.CV_32SC1, new Scalar(0)));
  int[] label = new int[1];
  double[] confidence = new double[1];
  faceRecognizer.predict(faceToAuthenticateFeatures, label, confidence);
  return confidence[0];
}

然后我在github上找到了你已经编译过的opencv依赖程序,但是看起来你并没有把opencv_contrib相关的模块编译进去
and then i surprised found your project,i see the hope, but, seems u did not compile the opencv's extra modules too.

i am not good at en.. u can refre the extra project https://github.com/opencv/opencv_contrib

[leafgrey]

hi ！Will there be any plans to include the compilation of opencv_contrib modules in future versions?