我试图编写一个应用 SURF 对象检测的代码,因此我采用了一个openCV示例(示例3),并开始更新onCameraViewStarted()
和onCameraFrame()
方法,但是在银河上尝试该方法时,我始终遇到运行时错误S3电话,我找不到任何有助于解决问题的信息,这是我的代码和更新的内容:
public class Sample3Native extends Activity implements CvCameraViewListener{
private static final String TAG = "OCVSample::Activity";
private Mat mRgba;
private Mat mGrayMat;
private CameraBridgeViewBase mOpenCvCameraView;
Mat descriptors ;
List<Mat> descriptorsList;
FeatureDetector featureDetector;
MatOfKeyPoint keyPoints;
DescriptorExtractor descriptorExtractor;
DescriptorMatcher descriptorMatcher;**
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
// Load native library after(!) OpenCV initialization
System.loadLibrary("native_sample");
mOpenCvCameraView.enableView();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
public void onCameraViewStarted(int width, int height) {
mRgba = new Mat(height, width, CvType.CV_8UC4);
mGrayMat = new Mat(height, width, CvType.CV_8UC1);
featureDetector=FeatureDetector.create(4); // SURF= 4;
descriptorExtractor=DescriptorExtractor.create(2);//SURF = 2
descriptorMatcher=DescriptorMatcher.create(6); //BRUTEFORCE_SL2 = 6**
}
public Mat onCameraFrame(Mat inputFrame) {
inputFrame.copyTo(mRgba);
//detect_1(0, mRgba.getNativeObjAddr(), keyPoints.getNativeObjAddr());
//Now mRgba contains the current frame ( start manipulation part)
//detecting keypoints
featureDetector.detect(mRgba, keyPoints);
//draw keypoints
// Features2d.drawKeypoints(mRgba, keyPoints, mRgba);
//finding descriptors
descriptorExtractor.compute(mRgba, keyPoints, descriptors);
//Matcher between 2 images or set of images
// Note: training set and query set are handled here! (in matcher)
//descriptorsList = descriptorMatcher.getTrainDescriptors();
//descriptorsList.add(descriptors);
// descriptorMatcher.add(descriptorsList);
//Imgproc.cvtColor(mRgba, mGrayMat, Imgproc.COLOR_RGBA2GRAY);
//FindFeatures(mGrayMat.getNativeObjAddr(), mRgba.getNativeObjAddr());
return mRgba;
}
}
注意:我已经尝试在
featureDetector.detect(mRgba, keyPoints)
方法中注释除onCameraFrame()
之外的所有内容,但仍然在手机上给出了运行时错误。 最佳答案
如果我没记错的话,OpenCV SURF Feature Detector仅适用于灰度图像。因此,尝试在onCameraFrame()
方法中调用 copyTo 后添加此内容:
cvtColor(mRgba, mGrayMat, COLOR_RGBA2GRAY);