我在casecadeclassifier.java类中收到空指针异常
在这里:
Mat objects_mat = objects;
detectMultiScale_4(nativeObj, image.nativeObj, objects_mat.nativeObj, scaleFactor);
这是我的日志:
02-11 20:53:15.209 10968-10968/? E/SystemUpdate-ReflectUtils: getClass android.provider.MiuiSettings$Privacy java.lang.ClassNotFoundException: android.provider.MiuiSettings$Privacy
02-11 20:53:15.596 11016-11016/? E/MiPicks-ReflectUtils: getField null.ACTION_PRIVACY_AUTHORIZATION_DIALOG java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Class.toString()' on a null object reference
02-11 20:53:15.597 11016-11016/? E/MiPicks-ReflectUtils: getFieldValue null.PRIVACY_PREFIX java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.reflect.Field java.lang.Class.getDeclaredField(java.lang.String)' on a null object reference
:18.013 11076-11263/? E/org.opencv.objdetect: objdetect::detectMultiScale_14() caught cv::Exception: OpenCV(4.0.1) /build/master_pack-android/opencv/modules/objdetect/src/cascadedetect.cpp:1658: error: (-215:Assertion failed) !empty() in function 'detectMultiScale'
02-11 20:53:18.014 11076-11263/? E/AndroidRuntime: FATAL EXCEPTION: Thread-4
Process: com.therobustprogrammer.opencvtestapp, PID: 11076
CvException [org.opencv.core.CvException: cv::Exception: OpenCV(4.0.1) /build/master_pack-android/opencv/modules/objdetect/src/cascadedetect.cpp:1658: error: (-215:Assertion failed) !empty() in function 'detectMultiScale'
]
at org.opencv.objdetect.CascadeClassifier.detectMultiScale_4(Native Method)
at org.opencv.objdetect.CascadeClassifier.detectMultiScale(CascadeClassifier.java:192)
at com.therobustprogrammer.opencvtestapp.MainActivity.onCameraFrame(MainActivity.java:205)
at org.opencv.android.CameraBridgeViewBase.deliverAndDrawFrame(CameraBridgeViewBase.java:392)
at org.opencv.android.JavaCameraView$CameraWorker.run(JavaCameraView.java:373)
at java.lang.Thread.run(Thread.java:760)
我在这里添加分类器
Imgproc.cvtColor(inputFrame.rgba(), matGray, Imgproc.COLOR_RGB2GRAY);
MatOfRect faceDetections = new MatOfRect();
cascadeFaceClassifier.detectMultiScale(matGray, faceDetections, 5);
这里是我的初始化
File faceClassifierDir = getDir("sampledata", Context.MODE_PRIVATE);
File mCasecadeFile = new File(faceClassifierDir, "haarcascade_eye.xml");
System.out.println("Absolute Path : " + mCasecadeFile.getAbsolutePath());
cascadeFaceClassifier = new CascadeClassifier(mCasecadeFile.getAbsolutePath());
cascadeFaceClassifier.load(mCasecadeFile.getAbsolutePath());
应用程序在主活动中崩溃。我是新来的,请帮忙。
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