【學習opencv 一】opencv3/C++實現圖像的讀入顯示和寫出
方法1:
//Example 1. A simple OpenCV program that loads an image from disk and displays it
//on the screen
#include <opencv2/opencv.hpp>
void help(char** argv ) {
std::cout << "\n"
<< "A simple OpenCV program that loads and displays an image from disk\n"
<< argv[0] <<" <path/filename>\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 = cv::imread( argv[1], -1 );
if( img.empty() ) return -1;
cv::namedWindow( "Example 2-1", cv::WINDOW_AUTOSIZE );
cv::imshow( "Example 2-1", img );
cv::waitKey( 0 );
cv::destroyWindow( "Example 2-1" );
return 0;
}
方法2:
//Example 1. A simple OpenCV program that loads an image from disk and displays it
//on the screen
#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
void help(char** argv ) {
cout << "\n"
<< "A simple OpenCV program that loads and displays an image from disk\n"
<< argv[0] <<" <path/filename>\n"
<< "For example:\n"
<< argv[0] << " ../fruits.jpg\n"
<< endl;
}
int main( int argc, char** argv ) {
if (argc != 2) {
help(argv);
return 0;
}
Mat img = imread( argv[1], -1 );
if( img.empty() ) return -1;
namedWindow( "Example 1", WINDOW_AUTOSIZE );
imshow( "Example 1", img );
waitKey( 0 );
destroyWindow( "Example 1" );
return 0;
}
實驗原圖:
結果:
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