Opencv C++ 归一化

 

Opencv C++下的Mat归一化
void Mat_L2_mormal(cv::Mat &image)
{
    //mat*mat,
    cv::Mat out;
    out=(image) .mul (image);
    float sum=0.0;
    for (int i=0;i<image.rows;i++){
        sum=sqrt(cv::sum(out.row(i))[0]);
        image.row(i)=(image.row(i)/sum);
    }
    out.release();
}

float scale =  0.0078125f ;
float mean_value = 127.5f;

void Mat_L2_mormal(cv::Mat &image)
{
	for (int i = 0; i<image.rows; i++)
	{
		for (int j = 0; j<image.cols; j++)
		{
			image.at<Vec3b>(i, j)[0] = (image.at<Vec3b>(i, j)[0] - mean_value) * scale;
			image.at<Vec3b>(i, j)[1] = (image.at<Vec3b>(i, j)[1] - mean_value) * scale;
			image.at<Vec3b>(i, j)[2] = (image.at<Vec3b>(i, j)[2] - mean_value) * scale;
		}
	}
	
}

这个也是减均值128，归一化

	cv::cvtColor(imgResized, imgResized, cv::COLOR_RGB2BGR);

	//Mat_L2_mormal(imgResized);
	vector<Mat> bgr;
	cv::split(imgResized, bgr);
	bgr[0].convertTo(bgr[0], CV_32F, 1.f / 128.f, -1.f);
	bgr[1].convertTo(bgr[1], CV_32F, 1.f / 128.f, -1.f);
	bgr[2].convertTo(bgr[2], CV_32F, 1.f / 128.f, -1.f);

 

来源：oschina

链接：https://my.oschina.net/u/4373527/blog/4282765