匹配断言失败错误的OpenCV的Andr​​oid

问题描述

我在写code找到从绘制类似物体摄​​像头preVIEW。我现在用的是最新的2.4.4 opencv的

下面是我的职务，并从logcat的输出。我在做什么错了我得到这样的输出？

 公共无效detect_image（马太福音mRgba）{

    object_desc =新垫（）;
    scene_desc =新垫（）;

    object_keys =新MatOfKeyPoint（）;
    scene_keys =新MatOfKeyPoint（）;

    比赛=新MatOfDMatch（）;
    good_matches =新MatOfDMatch（）;

    位图图像= BitmapFactory.de codeResource（getResources（），R.drawable.sto）;
    Utils.bitmapToMat（图像对象）;

    冲浪= FeatureDetector.create（FeatureDetector.FAST）;
    surf.detect（对象，object_keys）;
    surf.detect（mRgba，scene_keys）;
    surfEX = DescriptorExtractor.create（DescriptorExtractor.BRIEF）;
    surfEX.compute（对象，object_keys，object_desc）;
    surfEX.compute（mRgba，scene_keys，scene_desc）;
    DM = DescriptorMatcher.create（DescriptorMatcher.BRUTEFORCE_SL2）;
    dm.match（object_desc，scene_desc，匹配）;

    双max_dist = 0;
    双min_dist = 100;

    的for（int i = 0; I＆LT; object_desc.rows（）;我++）
      {双DIST = matches.toArray（）[我] .distance;
        如果（DIST＆LT; min_dist）min_dist = DIST;
        如果（DIST＆GT; max_dist）max_dist = DIST;
      }

     的for（int i = 0; I＆LT; object_desc.rows（）;我++）
      {MatOfDMatch临时=新MatOfDMatch（）;
         如果（matches.toArray（）[I] .distance 3; * min_dist）
         {temp.fromArray（matches.toArray（）[I]）;
             good_matches.push_back（临时）;
             }
      }

}



公共垫onCameraFrame（CvCameraViewFrame inputFrame）{
     mRgba = inputFrame.rgba（）;
             detect_image（mRgba）;
     返回inputFrame.rgba（）;
}
 

logcat的：

 一月3号至27日：55：31.258：E / CV ::错误（）（564）：OpenCV的错误：断言失败
（类型== src2.type（）＆安培;＆安培; src1.cols == src2.cols＆安培;＆安培;
（类型== CV_32F ||类型== CV_8U））的无效简历:: batchDistance（CV :: InputArray，
CV :: InputArray，CV :: OutputArray，INT，CV :: OutputArray，INT，INT，CV :: InputArray，
INT，BOOL），文件/home/reports/ci/slave/50-SDK/opencv/modules/core/src/stat.cpp，
行1803
 

解决方案

只是为了填补这一问题：

根据您的意见，下面一行是造成问题：

  dm.match（object_desc，scene_desc，匹配）;
 

我劝你要手动验证：

 （object_desc.type == scene_desc.type和放大器;＆安培;
 object_desc.cols == object_scene.cols）
 

问题是最终，对于第一帧， object_desc.cols（）！= scene_desc.cols（）。一个简单的如果就足以解决问题。

I'm writing code to find similar object from drawable in camerapreview. I am using the newest Opencv 2.4.4.

Below are my functions and an output from logcat. What am I doing wrong that I'm getting such output?

 public void detect_image (Mat mRgba) {

    object_desc = new Mat();
    scene_desc = new Mat();

    object_keys = new MatOfKeyPoint();
    scene_keys = new MatOfKeyPoint();

    matches = new MatOfDMatch();
    good_matches = new MatOfDMatch();

    Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.sto);
    Utils.bitmapToMat(image,object);

    surf = FeatureDetector.create(FeatureDetector.FAST);
    surf.detect( object, object_keys );
    surf.detect( mRgba, scene_keys);
    surfEX = DescriptorExtractor.create(DescriptorExtractor.BRIEF);
    surfEX.compute(object, object_keys, object_desc);
    surfEX.compute(mRgba, scene_keys, scene_desc);
    dm = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_SL2);
    dm.match(object_desc, scene_desc, matches);

    double max_dist = 0;
    double min_dist = 100;

    for( int i = 0; i < object_desc.rows(); i++ )
      { double dist = matches.toArray()[i].distance;
        if( dist < min_dist ) min_dist = dist;
        if( dist > max_dist ) max_dist = dist;
      }

     for( int i = 0; i < object_desc.rows(); i++ )
      {  MatOfDMatch temp = new MatOfDMatch();
         if( matches.toArray()[i].distance < 3*min_dist )
         {   temp.fromArray(matches.toArray()[i]);
             good_matches.push_back(temp);
             }
      }

}



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

Logcat:

03-27 01:55:31.258: E/cv::error()(564): OpenCV Error: Assertion failed
(type == src2.type() && src1.cols == src2.cols &&
(type == CV_32F || type == CV_8U)) in void cv::batchDistance(cv::InputArray,
cv::InputArray, cv::OutputArray, int, cv::OutputArray, int, int, cv::InputArray,
int,  bool), file /home/reports/ci/slave/50-SDK/opencv/modules/core/src/stat.cpp,
line 1803

解决方案

Just for the sake of closing this question:

According to your comment, the following line was causing the problem:

dm.match(object_desc, scene_desc, matches);

I advised you to manually verify that:

(object_desc.type == scene_desc.type &&
 object_desc.cols == object_scene.cols)

The problem was eventually that for the first frame, object_desc.cols() != scene_desc.cols(). A simple if was enough to solve the problem.

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