Android开发—基于OpenCV实现相机实时图像识别跟踪,android项目开发实训总结

本文介绍了如何在Android应用中使用OpenCV进行相机实时图像识别和跟踪。通过创建`CameraActivity`并结合`ImageDetectionFilter`,实现了从图像中检测特定目标并绘制追踪绿框的功能。博客详细讲解了关键代码,包括图像特征过滤、匹配及OpenCV的使用,并提供了项目实战总结。

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import com.sueed.imagerecognition.filters.Filter;

import com.sueed.imagerecognition.filters.NoneFilter;

import com.sueed.imagerecognition.filters.ar.ImageDetectionFilter;

import com.sueed.imagerecognition.imagerecognition.R;

import org.opencv.android.CameraBridgeViewBase;

import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;

import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;

import org.opencv.android.JavaCameraView;

import org.opencv.android.OpenCVLoader;

import org.opencv.core.Mat;

import java.io.IOException;

// Use the deprecated Camera class.

@SuppressWarnings(“deprecation”)

public final class CameraActivity extends AppCompatActivity implements CvCameraViewListener2 {

// A tag for log output.

private static final String TAG = CameraActivity.class.getSimpleName();

// The filters.

private Filter[] mImageDetectionFilters;

// The indices of the active filters.

private int mImageDetectionFilterIndex;

// The camera view.

private CameraBridgeViewBase mCameraView;

@Override

protected void onCreate(final Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

//init CameraView

mCameraView = new JavaCameraView(this, 0);

mCameraView.setMaxFrameSize(size.MaxWidth, size.MaxHeight);

mCameraView.setCvCameraViewListener(this);

setContentView(mCameraView);

requestPermissions();

mCameraView.enableView();

}

@Override

public void onPause() {

if (mCameraView != null) {

mCameraView.disableView();

}

super.onPause();

}

@Override

public void onResume() {

super.onResume();

OpenCVLoader.initDebug();

}

@Override

public void onDestroy() {

if (mCameraView != null) {

mCameraView.disableView();

}

super.onDestroy();

}

@Override

public boolean onCreateOptionsMenu(final Menu menu) {

getMenuInflater().inflate(R.menu.activity_camera, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(final MenuItem item) {

switch (item.getItemId()) {

case R.id.menu_next_image_detection_filter:

mImageDetectionFilterIndex++;

if (mImageDetectionFilters != null && mImageDetectionFilterIndex == mImageDetectionFilters.length) {

mImageDetectionFilterIndex = 0;

}

return true;

default:

return super.onOptionsItemSelect

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