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最新推荐文章于 2024-01-20 10:23:21 发布

减肥中的胖火柴

最新推荐文章于 2024-01-20 10:23:21 发布

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分类专栏： android开发

本文链接：https://blog.youkuaiyun.com/qq_34709056/article/details/73558639

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本文介绍了一个使用OpenCV进行图像灰度化处理的应用案例。文章详细展示了如何在Android环境中集成OpenCV，并实现图片的灰度化转换。此外，还分享了解决OpenCV库加载问题的方法。

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opencv的灰度化测试安装完成后提示找不到包让下载 opencv

把

@Override
    protected void onResume() {
        super.onResume();
        //load OpenCV engine and init OpenCV library
//        OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_9, getApplicationContext(), mLoaderCallback);
//        Log.i(TAG, "onResume sucess load OpenCV...");
        if (!OpenCVLoader.initDebug()) {
            Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
        } else {
            Log.d(TAG, "OpenCV library found inside package. Using it!");
            mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
        }
    }

上面注释掉改成这样就好了 直接返回成功

全部代码如下

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;


import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.imgproc.Imgproc;


//测试第二页  图片灰度化

public class ThreeActivity extends Activity {

    private Button btn;
    private ImageView img;
    private Bitmap srcBitmap;
    private Bitmap grayBitmap;
    private static boolean flag = true;
    private static boolean isFirst = true;
    private static final String TAG = "gao_chun";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.three);
        img = (ImageView) findViewById(R.id.img);
        btn = (Button) findViewById(R.id.btn);
        btn.setOnClickListener(new ProcessClickListener());
    }

    @Override
    protected void onResume() {
        super.onResume();
        //load OpenCV engine and init OpenCV library
//        OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_9, getApplicationContext(), mLoaderCallback);
//        Log.i(TAG, "onResume sucess load OpenCV...");
        if (!OpenCVLoader.initDebug()) {
            Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
        } else {
            Log.d(TAG, "OpenCV library found inside package. Using it!");
            mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
        }
    }

    ////OpenCV库加载并初始化成功后的回调函数  
    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
        @Override
        public void onManagerConnected(int status) {
            switch (status) {
                case BaseLoaderCallback.SUCCESS:
                    Log.i(TAG, "成功加载");
                    break;
                default:
                    super.onManagerConnected(status);
                    Log.i(TAG, "加载失败");
            }
        }
    };

    public void procSrc2Gray() {
        Mat rgbMat = new Mat();
        Mat grayMat = new Mat();
        srcBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.timg);
        grayBitmap = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(), Bitmap.Config.RGB_565);
        Utils.bitmapToMat(srcBitmap, rgbMat);//convert original bitmap to Mat, R G B.  
        Imgproc.cvtColor(rgbMat, grayMat, Imgproc.COLOR_RGB2GRAY);//rgbMat to gray grayMat
        Utils.matToBitmap(grayMat, grayBitmap);//convert mat to bitmap 
        Log.i(TAG, "procSrc2Gray sucess...");
    }

    public class ProcessClickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            if (isFirst) {
                procSrc2Gray();
                isFirst = false;
            }
            if (flag) {
                img.setImageBitmap(grayBitmap);
                btn.setText("查看原图");
                flag = false;
            } else {
                img.setImageBitmap(srcBitmap);
                btn.setText("灰度化");
                flag = true;
            }
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <ImageView
        android:id="@+id/img"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:layout_centerInParent="true"
        android:background="@mipmap/timg" /> 


    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="灰度化" />


</RelativeLayout>

随便放个图片测试下