Android OpenCV - 对象跟踪

Question

我使用特征检测实现对象跟踪，但出现以下错误:

12-19 20:59:16.943: E/cv::error()(31858): OpenCV Error: Assertion failed (src.dims == 2 && info.height == (uint32_t)src.rows && info.width == (uint32_t)src.cols) in void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv*, jclass, jlong, jobject, jboolean), file /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp, line 97 12-19 20:59:16.943: E/org.opencv.android.Utils(31858): nMatToBitmap catched cv::Exception: /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp:97: error: (-215) src.dims == 2 && info.height == (uint32_t)src.rows && info.width == (uint32_t)src.cols in function void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv*, jclass, jlong, jobject, jboolean) 12-19 20:59:16.943: E/CameraBridge(31858): Mat type: Mat [ 820*2672*CV_8UC3, isCont=true, isSubmat=false, nativeObj=0x55650380, dataAddr=0x5ec20010 ] 12-19 20:59:16.943: E/CameraBridge(31858): Bitmap type: 960*720 12-19 20:59:16.943: E/CameraBridge(31858): Utils.matToBitmap() throws an exception: /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp:97: error: (-215) src.dims == 2 && info.height == (uint32_t)src.rows && info.width == (uint32_t)src.cols in function void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv*, jclass, jlong, jobject, jboolean)

这是代码:

    public void onCameraViewStarted(int width, int height) {
    mRgba = new Mat();
    mGray = new Mat();
    mView = new Mat();
    mObject = new Mat();
}

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {    
    mRgba = inputFrame.rgba();

    switch (viewMode) {
    case VIEW_MODE_RGBA:

        return mRgba;

    case VIEW_MODE_FeatureDetect:
        try {
        mGray = inputFrame.gray();
        mObject = new Mat();
        mObject = Highgui.imread(Environment.getExternalStorageDirectory()+ "/Android/data/" + getApplicationContext().getPackageName() + "/Files/Object.jpg", Highgui.CV_LOAD_IMAGE_GRAYSCALE);
        mView = mGray.clone();          

        FeatureDetector myFeatureDetector = FeatureDetector.create(FeatureDetector.ORB);

        MatOfKeyPoint keypoints = new MatOfKeyPoint();
        myFeatureDetector.detect(mGray, keypoints);

        MatOfKeyPoint objectkeypoints = new MatOfKeyPoint();
        myFeatureDetector.detect(mObject, objectkeypoints);

        DescriptorExtractor Extractor = DescriptorExtractor.create(DescriptorExtractor.ORB);
        Mat sourceDescriptors = new Mat();
        Mat objectDescriptors = new Mat();
        Extractor.compute(mGray, keypoints, sourceDescriptors);
        Extractor.compute(mGray, objectkeypoints, objectDescriptors);
        DescriptorMatcher matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE);

        MatOfDMatch matches = new MatOfDMatch();
        matcher.match(sourceDescriptors, objectDescriptors, matches);

        Features2d.drawMatches(mGray, keypoints, mObject, objectkeypoints, matches, mView);

        return mView;
        } catch (Exception e) {
            Log.d("Exception",e.getMessage());
        }

    }

    return mRgba;
}

它不能在屏幕上显示对象，但我需要一些信息，我可以放置矩形或其他可以标记对象我想要跟踪的内容。抱歉我的英语不好，我希望你明白我在问什么，谢谢你的任何建议。

Answer 1

感谢Darshan的建议，我解决了问题，需要调整图片大小，在 Features2d.drawMatches(mGray, keypoints, mObject, objectkeypoints, matches, mView); 下方添加此代码，如下所示code> 然后它就可以工作了。