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我正在尝试检测黑色图像中的白色矩形。我在Canny之后用过HoughLinesP,检测准确。问题是,有些线条非常相似,几乎定义了相同的边缘。因此,在 HgouhLinesP 返回的矩阵中,我拥有的不止是 4 行。是否可以更改 HoughLinesP 中的参数以使其仅生成 4 行?

我试图实现一种方法,比较所有生成的线的方程,但相似的线似乎有非常不同的方程,结果是错误的。所以基本上我创建了一个 4x4 矩阵并将第一行放入其中。然后我比较以下几行,当其中一条不同时,我将其放入 4x4 矩阵等中。我将其余行与 4x4 矩阵中已经存在的行进行比较。有人可以帮忙吗?

 Imgproc.Canny(diff, diff2, 100, 100, 3);

        Mat lines = new Mat();
        int threshold = 80;
        int minLineSize = 150;
        int lineGap = 80;
        Imgproc.HoughLinesP(diff2, lines, 1, Math.PI / 180, threshold, minLineSize, lineGap);
        double[][] linesFinal = new double[4][4];
        linesFinal[0] = lines.get(0, 0);

        double x01 = linesFinal[0][0],
                y01 = linesFinal[0][1],
                x02 = linesFinal[0][2],
                y02 = linesFinal[0][3];
        double a = y02 - y01 / x02 - x01;
        double b = y01 - a * x01;
        Log.i(TAG, "aaaaaaaaaaaaaaaaaaaaa:    " + String.valueOf(a) + "bbbbbbbbbb     " + String.valueOf(b));
        Point start0 = new Point(x01, y01);
        Point end0 = new Point(x02, y02);

        Core.circle(finaleuh, end0, 10, new Scalar(255, 0, 0, 255), 10);
        Core.circle(finaleuh, start0, 10, new Scalar(255, 0, 0, 255), 10);

        int index = 1;
        int x = 1;


        while (index < 4 && x < lines.cols()) {

            // Log.i(TAG,"xxxxxxxxxxxxxxxx:    "+ String.valueOf(x)+"   indeeeeeex      "+ String.valueOf(index));
            double[] vec = lines.get(0, x);
            double Xi1 = vec[0],
                    Yi1 = vec[1],
                    Xi2 = vec[2],
                    Yi2 = vec[3];
            double Ai = (Yi2 - Yi1) / (Xi2 - Xi1);
            double Bi = Yi1 - Ai * Xi1;
            //  Log.i(TAG,"aaaaaaaaaaaaaaaaaaaaa:    "+ String.valueOf(Ai)+ "bbbbbbbbbb     " + String.valueOf(Bi));

            int counter = 0;
            for (int i = 0; i < index; i++)

            {

                double xF = linesFinal[i][0],
                        yF = linesFinal[i][1],
                        xFF = linesFinal[i][2],
                        yFF = linesFinal[i][3];


                double aF = yFF - yF / xFF - xF;
                double bF = yF - aF * xF;
                Log.i(TAG, "aaaaaaaaaaaaaaaaaaaaa:    " + String.valueOf(aF) + "bbbbbbbbbb     " + String.valueOf(bF));

                double diffFA = Math.abs(aF - Ai);
                double diffFB = Math.abs(bF - Bi);

                if (diffFA > 250 && diffFB > 300) {
                    counter = counter + 1;


                }

            }


            if (counter == index)


            {
                linesFinal[index] = vec;
                double xF = linesFinal[index][0],
                        yF = linesFinal[index][1],
                        xFF = linesFinal[index][2],
                        yFF = linesFinal[index][3];

                Point startF = new Point(xF, yF);
                Point endF = new Point(xFF, yFF);
                Core.circle(finaleuh, endF, 10, new Scalar(255, 0, 0, 255), 10);
                Core.circle(finaleuh, startF, 10, new Scalar(255, 0, 0, 255), 10);
                index++;
                x++;
            } else {
                x++;
            }


        }
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1 回答 1

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对于那些可能需要它的人,我毕竟把事情整理好了。我基本上用我的线条创建了两个类别,在每个类别中,所有的线条都是平行的。我通过将第一条线的斜率与所有剩余线的斜率进行比较来做到这一点。然后在每个类别中,我比较了 B 的值(来自方程 y = Ax+B)。最后我只写了 4 行。

于 2015-12-14T12:27:14.630 回答