opencv for andriod java代码实现霍夫变化(HoughLinesP)

最新推荐文章于 2023-10-04 12:29:41 发布

WeiGuanQun

最新推荐文章于 2023-10-04 12:29:41 发布

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分类专栏： opencv 文章标签： java opencv

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本文介绍如何在Android应用中利用Java代码通过OpenCV实现霍夫变换（HoughLinesP）来检测图像中的直线。具体步骤包括将位图转换为Mat对象，进行灰度转换、Canny边缘检测，最后应用霍夫概率变换找到并绘制直线。

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opencv for andriod java代码实现霍夫变化(HoughLinesP)

Mat mCannyMat1=new Mat();           
Mat rgbMat1 = new Mat();  
Mat grayMat1 = new Mat();           
Mat lines=new Mat();

Utils.bitmapToMat(bmp, rgbMat1);

//gray
Imgproc.cvtColor(rgbMat1, grayMat1, Imgproc.COLOR_RGB2GRAY);
//canny
Imgproc.Canny(grayMat1, mCannyMat1, 80, 160);
//houghlinesp
Imgproc.HoughLinesP(mCannyMat1, lines, 1, Math.PI /180, 30,100,30);

editText=(EditText)findViewById(R.id.show_feature_Text);
            editText.setText("lines="+lines.dump());
for (int y=0;y<lines1.rows();y++)
{
    double[] vec = lines1.get(y, 0);

    double  x1 = vec[0], 
    y1 = vec[1],
    x2 = vec[2],
    y2 = vec[3];    

    Point start = new Point(x1, y1);
    Point end = new Point(x2, y2);
    Imgproc.line(mCannyMat2, start, end, new Scalar(255,0,0), 1);
}

Bitmap grayBmp2 = Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(), Config.RGB_565);
Utils.matToBitmap(mCannyMat2, grayBmp2);

imageView.setImageBitmap(grayBmp2);