小编Rud*_*ral的帖子

我在eclipse中使用了更新的willowgarage opencv库.我想将mat变量转换为灰度,我已经尝试了我在网上找到的所有内容,但它们并没有为我工作.

这是我的代码

package com.deneme.deneme;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;
import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.imgproc.Imgproc;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
public class main extends Activity {
/** Called when the activity is first created. */

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ImageView img=(ImageView) findViewById(R.id.pic);

    Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.p26);

    Mat imgToProcess=Utils.bitmapToMat(bmp);

    //******
    //right here I need to convert this imgToProcess to grayscale for future opencv processes
    //******

    Bitmap bmpOut = Bitmap.createBitmap(imgToProcess.cols(), imgToProcess.rows(), Bitmap.Config.ARGB_8888); 

    Utils.matToBitmap(imgToProcess, bmpOut);
    img.setImageBitmap(bmpOut);
} …

我只想在c ++项目中显示这个"img1.jpg"图像,使用opencv libs进行未来的处理,但它只显示一个空的灰色窗口.这是什么原因.这段代码有错吗？请帮忙!

这是代码;

 Mat img1;
 char imagePath[256] = "img1.jpg";
 img1 = imread(imagePath, CV_LOAD_IMAGE_GRAYSCALE);
 namedWindow("result", 1);
 imshow("result", img1);

谢谢...