如何确定一个cv :: Mat是一个零矩阵？ [英] How to determine if a cv::Mat is a zero matrix?

问题描述

我有一个根据以下代码动态更改的矩阵：

I have a matrix that is dynamically being changed according to the following code;

 for( It=all_frames.begin(); It != all_frames.end(); ++It)
{
    ItTemp = *It;

    subtract(ItTemp, Base, NewData);

    cout << "The size of the new data for ";
    cout << " is \n" << NewData.rows << "x" << NewData.cols << endl;
    cout << "The New Data is: \n" << NewData << endl << endl;

    NewData_Vector.push_back(NewData.clone());

}

我想要做的是确定cv :: Mat NewData是一个零矩阵。
我尝试过使用cv :: compare（）函数和简单的运算符（即NewData == NoData）将它与零大小的矩阵进行比较，但是我甚至不能编译程序。

What I want to do is determine the frames at which the cv::Mat NewData is a zero matrix. I've tried comparing it to a zero matrix that is of the same size, using both the cv::compare() function and simple operators (i.e NewData == NoData), but I can't even compile the program.

有一个简单的方法来确定cv :: Mat是由零填充的吗？

Is there a simple way of determining when a cv::Mat is populated by zeroes?

推荐答案

我使用了

if (countNonZero(NewData) < 1) 
{
    cout << "Eye contact occurs in this frame" << endl;
}

这是一个非常简单

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