如何零元素的3D矩阵与opencv库？ [英] How to zero elements of 3D Matrix with opencv Library?

问题描述

我正在努力与opencv的3D矩阵的零元素。
我可以在2D矩阵中的所有元素，如下所示：

I'm struggling with zeroing elements of 3D matrix with opencv. I can zero all elements in 2D matrix like following way:

meta = new Mat(Mat::zeros(cluster,3,CV_32S));

我尝试使用类似的方法在3D矩阵中初始化元素为0，

I try to use the similar way to initialize elements with 0 in 3D matrix, it fails.

block = new Mat(Mat::zeros(3,dim,CV_32F));

错误讯息：

1>MatrixOp.obj : error LNK2019: unresolved external symbol "public: static class cv::MatExpr __cdecl cv::Mat::zeros(int,int const *,int)" (?zeros@Mat@cv@@SA?AVMatExpr@2@HPBHH@Z) referenced in function "public: __thiscall MatrixOp::MatrixOp(char *)" (??0MatrixOp@@QAE@PAD@Z)

我有一个最后一种方式来初始化矩阵。遍历矩阵并设置元素值0.但它似乎劳动一些。

I got one last way to initialize matrix. Traverse the matrix and set element value 0. But it seems labor-some.

for(int i=0;i<value_num;i++)
    for(int j=0;j<frame_no;j++)
        for(int k=0;k<cluster;k++)
            block->at<float>(i,j,k) = 0;

任何人都可以给我一个更好的想法？
谢谢。

Can anyone throw me a better ideas? Thanks.

推荐答案

我提醒您文档，您可以使用此构造函数：

I remind you the documentation, you can use this constructor:

C++: Mat::Mat(int ndims, const int* sizes, int type, const Scalar& s)

传递cv :: Scalar（0）应该适合你的目的。

passing cv::Scalar(0) should be good for your purposes.

int sizes[] = { 100, 100, 100 };
cv::Mat *matrix = new cv::Mat(3, sizes, CV_32FC1, cv::Scalar(0));

这应该是一个3D矩阵，一种边为100的立方体。

This should make a 3D matrix, a sort of cube with edge 100.

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