python opencv读取图像像素值_Opencv读取图片像素值并保存为txt文件

#include

#include

#include

using namespace std;

using namespace cv;

int main(int argc, char* argv[])

{

const char* imagename = "2.jpg";

//从文件中读入图像

Mat img = imread(imagename);

ofstream outfile("rgb.txt");

//如果读入图像失败

if (img.empty())

{

fprintf(stderr, "Can not load image %s\n", imagename);

return -1;

}

int i, j;

int cPointR, cPointG, cPointB, cPoint;//currentPoint;

for (i = 1; i < img.rows; i++)

{

　　　　for (j = 1; j

{

cPointB = img.at(i, j)[0];

cPointG = img.at(i, j)[1];

cPointR = img.at(i, j)[2];

cout << "R:"<

outfile << i<

if (cPointB>100 & cPointR<100 & cPointG<100)

{

img.at(i, j)[0] = 0; //单通道是uchar，没有[0][1][2]

img.at(i, j)[1] = 0;

img.at(i, j)[2] = 0;

}

}

outfile << endl;

}

//显示图像

imshow("image", img);

//此函数等待按键，按键盘任意键就返回

waitKey();

return 0;

}