Application error while recognizing an image

[jheimes-silveira]

When recognizing an image the application is stopped working...
The log that appears to me is:

04-23 19:25:55.964 19295-20628/com.lauszus.facerecognitionapp I/FaceRecognitionAppActivity/Native: Using Eigenfaces
04-23 19:25:55.964 19295-20628/com.lauszus.facerecognitionapp I/FaceRecognitionAppActivity/Native: Reconstructing Faces
04-23 19:25:55.974 19295-20628/com.lauszus.facerecognitionapp A/libc: /home/jheimes/eigen-eigen-67e894c6cd8f/Eigen/src/Core/CwiseBinaryOp.h:110: Eigen::CwiseBinaryOp<Eigen::internal::scalar_difference_op<float, float>, const Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<int, float>, const Eigen::Matrix<int, -1, -1, 0, -1, -1> >, const Eigen::Replicate<Eigen::Matrix<float, -1, 1, 0, -1, 1>, 1, -1> >::CwiseBinaryOp(const Lhs &, const Rhs &, const BinaryOp &) [BinaryOp = Eigen::internal::scalar_difference_op<float, float>, LhsType = const Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<int, float>, const Eigen::Matrix<int, -1, -1, 0, -1, -1> >, RhsType = const Eigen::Replicate<Eigen::Matrix<float, -1, 1, 0, -1, 1>, 1, -1>]: assertion "aLhs.rows() == aRhs.rows() && aLhs.cols() == aRhs.cols()" failed
04-23 19:25:55.974 19295-20628/com.lauszus.facerecognitionapp A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 20628 (AsyncTask #2)
04-23 19:25:56.684 19295-19295/com.lauszus.facerecognitionapp W/art: Verification of void android.support.v4.widget.NestedScrollView$AccessibilityDelegate.onInitializeAccessibilityEvent(android.view.View, android.view.accessibility.AccessibilityEvent) took 658.990ms

[Lauszus]

Does this happen with the app downloaded from the Google Play store as well: https://play.google.com/store/apps/details?id=com.lauszus.facerecognitionapp?

[jheimes-silveira]

A version that is in the store is approved, but I downloaded the source and reproduced, this is giving me this error.

[Lauszus]

@jheimes-silveira you need to give me some more information, so I can reproduce it. When does this happen? Please try to describe it in more detail, so I can fix it.

[jheimes-silveira]

Good morning, I changed a version of eigen, it worked better, which version are you using?

[Lauszus]

I have been using Eigen 3.1.0 and 3.3.3.

[Lauszus]

Closing this issue due to lack of response. Feel free to reopen if it is still an issue.

[Aashima-Gupta]

Hi..
i am facing an error in face recognition.
The app is not recognizing any face. Can you mention all possibilities for this going wrong?

Why always the value of mindist is returned as -1 ?

[Aashima-Gupta]

Code:

float minDist = bundle.getFloat(NativeMethods.MeasureDistTask.MIN_DIST_FLOAT);
Log.i(TAG,"min Dist"+ minDist);
try {
   if (minDist != -1) {
       int minIndex = bundle.getInt(NativeMethods.MeasureDistTask.MIN_DIST_INDEX_INT);
       float faceDist = bundle.getFloat(NativeMethods.MeasureDistTask.DIST_FACE_FLOAT);
       if (imagesLabels.size() > minIndex) { // Just to be sure
           Log.i(TAG, "dist[" + minIndex + "]: " + minDist + ", face dist: " + faceDist + ", label: " + imagesLabels.get(minIndex));

           String minDistString = String.format(Locale.US, "%.4f", minDist);
           String faceDistString = String.format(Locale.US, "%.4f", faceDist);

           if (faceDist < faceThreshold && minDist < distanceThreshold) // 1. Near face space and near a face class
               showToast("Face detected: " + imagesLabels.get(minIndex) + ". Distance: " + minDistString, Toast.LENGTH_LONG);
           else if (faceDist < faceThreshold) // 2. Near face space but not near a known face class
               showToast("Unknown face. Face distance: " + faceDistString + ". Closest Distance: " + minDistString, Toast.LENGTH_LONG);
           else if (minDist < distanceThreshold) // 3. Distant from face space and near a face class
               showToast("False recognition. Face distance: " + faceDistString + ". Closest Distance: " + minDistString, Toast.LENGTH_LONG);
           else // 4. Distant from face space and not near a known face class.
               showToast("Image is not a face. Face distance: " + faceDistString + ". Closest Distance: " + minDistString, Toast.LENGTH_LONG);
       }
   } else {
       Log.w(TAG, "Array is null");
       if (useEigenfaces || uniqueLabels == null || uniqueLabels.length > 1)
           // uniqueLabels.length is null
           showToast("Keep training...", Toast.LENGTH_SHORT);
       else
           showToast("Fisherfaces needs two different faces", Toast.LENGTH_SHORT);
   }
} catch (Exception e) {
   e.printStackTrace();
   e.getMessage();
}

Since mindist is always -1 , it always shows array is null
So what exactly mindist variable should contain to recognize faces correctly??

[Lauszus]

If it returns -1, then it means that there there were no Eigenvectors:

FaceRecognitionApp/app/src/main/cpp/face-lib.cpp

Line 96 in c845ee3

if (pFacebase->V.any()) { // Make sure that the eigenvector has been calculated

Is there printed any exceptions here:

FaceRecognitionApp/app/src/main/java/com/lauszus/facerecognitionapp/NativeMethods.java

Line 129 in 58835ee

Log.e(TAG, error.getMessage());

or here:

FaceRecognitionApp/app/src/main/java/com/lauszus/facerecognitionapp/NativeMethods.java

Line 83 in 58835ee

Log.e(TAG, error.getMessage());