opencvsharp:我怎么能改变MatExpr到Mat

Question

        Mat a = new Mat(3, 1, MatType.CV_8UC1);
        Mat b = new Mat(1,3, MatType.CV_8UC1);
        for( int i = 0; i < 3; i++ )
        {
            a.Set<byte>(i, 0, (byte)i);
            b.Set<byte>(0, i, (byte)(i + 3));
        }
        var c = a * b;  
        mat = c.ToMat(); // error

a.Mul(b)的结果是MatExpr类
我想创建一个3x3矩阵。
我怎样才能上Mat班呢?

Answer 1

self answer: Opencv的矩阵乘法只支持double类型
如果您想以字节格式计算，请参阅此。

        Mat a = new Mat(3, 1, MatType.CV_64FC1, new double[] { 1.0, 2.0, 3.0 });
        Mat b = new Mat(1, 3, MatType.CV_64FC1, new double[] { 4.0, 5.0, 6.0 });
        Mat c = new Mat(3, 3, MatType.CV_64FC1);

        var c = (a * b).ToMat();
        c.ConvertTo(c, MatType.CV_8UC1);
        Trace.WriteLine(c.At<byte>(0,0)); // 4