opencv中调整图像的亮度（c++）day2

#include<opencv2\opencv.hpp>
#include<iostream>


using namespace cv;
int main()
{
	Mat src1=imread("aa.jpg");
	Mat src2=imread("bb.jpg");
	Mat dst,dst1,dst2;
	if(src1.empty()||src2.empty())
	{
		printf("加载失败\n");
		return -1;
	}
	float alpha=1.5;
	float beta =30;

	 dst=Mat::zeros(src1.size(),src1.type());
	for(int i=0;i<src1.rows;i++)
	{
		for(int j=0;j<src1.cols;j++)
		{
			if(src1.channels()==3)
			{
					float b=src1.at<Vec3b>(i,j)[0];
					float g=src1.at<Vec3b>(i,j)[1];
					float r=src1.at<Vec3b>(i,j)[2];
			
					dst.at<Vec3b>(i,j)[0]=saturate_cast<uchar>(b*alpha+beta);
					dst.at<Vec3b>(i,j)[1]=saturate_cast<uchar>(g*alpha+beta);
					dst.at<Vec3b>(i,j)[2]=saturate_cast<uchar>(r*alpha+beta);
			}
			else if(src1.channels()==1){
					float v=src1.at<uchar>(i,j);
					dst.at<uchar>(i,j)=saturate_cast<uchar>(v*alpha+beta);
			}
		}
	}
	imshow("dst",dst);
	waitKey(0);
	return 0;
}