Opencv Matrix元素的列总和 [英] Column sum of Opencv Matrix elements

问题描述

我需要分别计算所有列中的元素总和.

I need to compute sum of elements in all columns separately.

现在我正在使用:

应该将矩阵cross_corr相加.

Matrix cross_corr should be summed.

Mat cross_corr_summed;
for (int i=0;i<cross_corr.cols;i++)                                                     
    {
        double column_sum=0;
        for (int k=0;k<cross_corr.rows;k++)
        {
            column_sum +=cross_corr.at<float>(k,i);             
        }
        cross_corr_summed.push_back(column_sum);
    }

问题是我的程序需要很长时间才能运行.这是可疑的部分之一. 您能建议任何可能更快的实施方式吗?

The problem is that my program takes quite a long time to run. This is one of parts that is suspicious to cause this. Can you advise any possible faster implementation???

谢谢！

推荐答案

您需要 cv: :reduce :

cv::reduce(cross_corr, cross_corr_summed, 0, CV_REDUCE_SUM, CV_32S);

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