加载显示图像+图像简单处理代码

#include
#include
#include

using namespace cv;
using namespace std;

int main( int argc, char **argv )
{
if( argc != 2 )
{
cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
return -1;
}

Mat image;
image = imread( argv[1], CV_LOAD_IMAGE_COLOR ); // Read the file

if(! image.data ) // Check for invalid input
{
cout << "Could not open or find the image" << std::endl ;
return -1;
}

namedWindow( "Display window", CV_WINDOW_AUTOSIZE );// Create a window for display.
imshow( "Display window", image ); // Show our image inside it.

waitKey(0); // Wait for a keystroke in the window
return 0;
}


#include
#include
#include

using namespace cv;

int main( int argc, char **argv )
{
string imageName = argv[1];

Mat image;
image = imread( imageName, 1 );

if( argc != 2 || !image.data )
{
printf( " No image data \n " );
return -1;
}

Mat gray_image;
cvtColor( image, gray_image, CV_RGB2GRAY );

imwrite( "Gray_Image.jpg", gray_image );

namedWindow( imageName, CV_WINDOW_AUTOSIZE );
namedWindow( "Gray image", CV_WINDOW_AUTOSIZE );

imshow( imageName, image );
imshow( "Gray image", gray_image );

waitKey(0);

return 0;
}