如何在没有相机的情况下将OpenCV与存储的图像一起使用？

1 回答

• 6

  如果有人还在寻找答案：

  package com.example.ocv4androidwithoutcamera;
  
  import org.opencv.android.BaseLoaderCallback;
  import org.opencv.android.InstallCallbackInterface;
  import org.opencv.android.LoaderCallbackInterface;
  import org.opencv.android.OpenCVLoader;
  import org.opencv.core.Mat;
  
  import android.os.Bundle;
  import android.app.Activity;
  import android.util.Log;
  import android.widget.Toast;
  
  public class MainActivity extends Activity implements LoaderCallbackInterface {
  
      protected BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
          @Override
          public void onManagerConnected(int status) {
              switch (status) {
              case LoaderCallbackInterface.SUCCESS:
              {
                  onOpenCVReady();
              } break;
              default:
              {
                  super.onManagerConnected(status);
              } break;
              }
          }
      };
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
      }
  
      @Override
      protected void onResume()
      {
          super.onResume();
  
          Log.i("DEMO", "Trying to load OpenCV library");
          if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_4, this, mOpenCVCallBack))
          {
              Log.e("DEMO", "Cannot connect to OpenCV Manager");
          }
      }
  
      protected void onOpenCVReady(){
          //this should crash if opencv is not loaded
          Mat img = new Mat();
          Toast.makeText(getApplicationContext(), "opencv ready", Toast.LENGTH_LONG).show();
  
      }
  
      @Override
      public void onManagerConnected(int status) {
          // TODO Auto-generated method stub
  
      }
  
      @Override
      public void onPackageInstall(int operation,
              InstallCallbackInterface callback) {
          // TODO Auto-generated method stub
  
      }
  
  }
  

  不要忘记在Project Properties => Android => Library中添加opencv库 .

  回复于 2024-05-02T05:17:39+08:00