Android开发—基于OpenCV实现相机实时图像识别跟踪

xmlns:opencv=“http://schemas.android.com/apk/res-auto”

xmlns:tools=“http://schemas.android.com/tools”

android:id=“@+id/activity_img_recognition”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

tools:context=“com.sueed.imagerecognition.CameraActivity”>

<org.opencv.android.JavaCameraView

android:id=“@+id/jcv”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

android:visibility=“gone”

opencv:camera_id=“any”

opencv:show_fps=“true” />

主要逻辑代码

CameraActivity.java 【相机启动获取图像和包装MAT相关】

因为OpenCV中JavaCameraView继承自SurfaceView，若有需要可以自定义编写extends SurfaceView implements SurfaceHolder.Callback的xxxSurfaceView替换使用。

package com.sueed.imagerecognition;

import android.Manifest;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import android.view.SurfaceView;

import android.view.View;

import android.view.WindowManager;

import android.widget.ImageView;

import android.widget.RelativeLayout;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.app.ActivityCompat;

import androidx.core.content.ContextCompat;

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();