使用OpenCV獲取圖像的骨架

Question

我讀了一篇文章，談論如何在C ++中使用OpenCV精簡圖像。 http://felix.abecassis.me/2011/09/opencv-morphologic-skeleton/

看起來不錯。 但是我試圖在Unity中將它與稱為OpenCV for Unity（OpenCV Java 3.1.0的克隆）的資產一起使用。
所以我嘗試將代碼從C ++移植到C＃，但失敗了。
我試圖通過寫出圖像進行調試。 原來圖像是全黑的。

順便說一句，我的用例是在白色背景中，並且代碼是我認為的黑色背景，但是我用黑色背景白色形狀對其進行了測試，仍然沒有運氣。

FML，這是我在循環中添加寫入行后看到的內容

Mat GetSkel (Texture2D srcTexture) 
{
    Mat img = new Mat (srcTexture.height, srcTexture.width, CvType.CV_8UC1);
    Utils.texture2DToMat (srcTexture, img);
    Debug.Log ("img.ToString() " + img.ToString ());

    Imgproc.threshold (img, img, 127, 255, Imgproc.THRESH_BINARY);
    Mat skel = new Mat (srcTexture.height, srcTexture.width, CvType.CV_8UC1, new Scalar (0));
    Mat temp = new Mat();
    Mat eroded = new Mat();

    Mat element = Imgproc.getStructuringElement (Imgproc.MORPH_CROSS, new Size(3,3));

    bool done;
    do 
    {
        Imgproc.erode(img, eroded, element);
        Imgproc.dilate(eroded, temp, element);
        Core.subtract(img, temp, temp);
        Core.bitwise_or(skel, temp, skel);
        eroded.copyTo(img);

        done = (Core.countNonZero(img) == 0);
    } while (!done);

    Imgcodecs.imwrite ("/Users/fung/Documents/FYP/Future/Assets/Future -fung/img.jpg", img);

    return img;

}

Answer 1

private void skeleton(Mat _img)
   {
       boolean done = false;
       Mat img = _img.clone();
       CvUtilsFX.showImage(img, "tresh_1");

       Mat imgGray = new Mat();
       Imgproc.cvtColor(img, imgGray, Imgproc.COLOR_BGR2GRAY);

       Mat tresh = new Mat();
       double thresh = Imgproc.threshold(imgGray, tresh, 100, 255, Imgproc.THRESH_BINARY_INV | Imgproc.THRESH_OTSU); 
       CvUtilsFX.showImage(tresh, "tresh_1");

       Mat element = Imgproc.getStructuringElement(Imgproc.MORPH_CROSS, new Size(3,3));
       Mat eroded = new Mat();
       Mat temp = new Mat();
       Mat skel = new Mat (tresh.rows(), tresh.cols(), CvType.CV_8UC1, new Scalar (0));

       int size = _img.cols() * _img.rows();
       int zeros = 0;

       while(!done)
       {
           Imgproc.erode(tresh, eroded, element);
           Imgproc.dilate(eroded, temp, element);
           Core.subtract(tresh, temp, temp);
           Core.bitwise_or(skel, temp, skel);
           eroded.copyTo(tresh);

           zeros = size - Core.countNonZero(tresh);
           if(zeros == size)
               done = true;
       }
       CvUtilsFX.showImage(skel, "Skeleton");
   }

圖片