代码拉取完成,页面将自动刷新
// Example 2-9. Getting and setting pixels in Example 2-8
#include <opencv2/opencv.hpp>
void help(char** argv ) {
std::cout << "\n"
<< "\nExample 2-9. Getting and setting pixels in Example 2-8"
<< "\nCall:\n"
<< argv[0] <<" <path/image>\n"
<< "For example:\n"
<< argv[0] << " ../fruits.jpg\n"
<< std::endl;
}
int main( int argc, char** argv ) {
if (argc != 2) {
help(argv);
return 0;
}
cv::Mat img_rgb, img_gry, img_cny, img_pyr, img_pyr2;
cv::namedWindow( "Example Gray", cv::WINDOW_AUTOSIZE );
cv::namedWindow( "Example Canny", cv::WINDOW_AUTOSIZE );
img_rgb = cv::imread( argv[1] );
cv::cvtColor( img_rgb, img_gry, cv::COLOR_BGR2GRAY);
cv::pyrDown( img_gry, img_pyr );
cv::pyrDown( img_pyr, img_pyr2 );
cv::Canny( img_pyr2, img_cny, 10, 100, 3, true );
// ----------------------------------------------------
// Start new code for example 2-9
//
int x = 16, y = 32;
cv::Vec3b intensity = img_rgb.at< cv::Vec3b >(y, x);
// ( Note: We could write img_rgb.at< cv::Vec3b >(x,y)[0] )
//
uchar blue = intensity[0];
uchar green = intensity[1];
uchar red = intensity[2];
std::cout << "At (x,y) = (" << x << ", " << y <<
"): (blue, green, red) = (" <<
(unsigned int) blue <<
", " << (unsigned int)green << ", " <<
(unsigned int) red << ")" << std::endl;
std::cout << "Gray pixel there is: " <<
(unsigned int) img_gry.at<uchar>(y, x) << std::endl;
x /= 4; y /= 4;
std::cout << "Pyramid2 pixel there is: " <<
(unsigned int)img_pyr2.at<uchar>(y, x) << std::endl;
img_cny.at<uchar>(x, y) = 128; // Set the Canny pixel there to 128
//
// End new code for example 2-9
// ----------------------------------------------------
cv::imshow( "Example Gray", img_gry );
cv::imshow( "Example Canny", img_cny );
cv::waitKey(0);
}
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。