Mat和Vec_类型乘法 [英] Mat and Vec_ types multiplication

问题描述

有没有简单的方法可以将Mat和Vec_相乘? (提供了它们的尺寸，例如:

Is there any easy way to multiplicate Mat and Vec_? (Provided, that they have proper sizes, e.g.:

Mat_<double> M = Mat(3,3,CV_32F);
Vec3f V=(1,2,3);
result = M*V //?

也许有一些简单的方法可以基于Vec3创建行(或列)Mat?

Maybe there is some easy method of creating row (or col) Mat based on Vec3?

推荐答案

您不能只将Mat和Vec(或更常见的是Matx_)元素相乘. 将Vec对象投射到Mat :

You can't just multiply Mat and Vec (or, more generally, Matx_) elements. Cast the Vec object to Mat:

Mat_<float> M = Mat::eye(3,3,CV_32F);
Vec3f V=(1,2,3);
Mat result = M*Mat(V);

此外，我注意到您的代码中有一个错误:构造M时，类型CV_32F对应于float元素，而不是double.我的代码示例中也对此进行了纠正.

Also, I noticed an error in your code: when constructing M, the type CV_32F corresponds to float elements, not double. This is also corrected in my code example.

希望有帮助.

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