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sultanofswing.90's profile - activity

2014-04-04 13:33:16 -0500 asked a question Atrous Algorithm (cv-java-android)

Hi, i'm developing an algorithm that require some wavelet planes. I wrote this code:

private Mat getAtrousPlane(Mat img, byte n)
{
    Mat grayImg = new Mat(img.height(), img.width(), CvType.CV_8UC1);
    Imgproc.cvtColor(img, grayImg, Imgproc.COLOR_RGB2GRAY);

    Mat wavelet = new Mat(img.height(), img.width(), CvType.CV_8UC1);
    Mat k = Mat.zeros(2*n+3,2*n+3,CvType.CV_8UC1);

    int kw = k.width();
    int kh = k.height();

    k.put(0, 0, 1);
    k.put(n+2, 0, 2);
    k.put(kh, 0, 1);

    k.put(0, n+2, 2);
    k.put(n+2, n+2, 4);
    k.put(kh, n+2, 2);

    k.put(0, kw, 1);
    k.put(n+2, kw, 2);
    k.put(kh, kw, 1);


    Imgproc.filter2D(grayImg, wavelet, -1, k);

    return wavelet;
}

where img is an RGB image and n is the level of the wavelet plane to calculate. The problem is that the result is not the same as that obtained with an equivalent matlab script. Can someone help me on calculating wavelet planes?

Bye