使用OpenCV 改變圖片的顏色成為灰色,並將資料儲存在檔案中,以及顯示在畫面上。
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#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <iostream>
#include <string.h>
#include <fstream>
using namespace cv;
int main( int argc, char** argv )
{
char* 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_BGR2GRAY );
imwrite( "Gray_Image.jpg", gray_image );
namedWindow( "Gray image", CV_WINDOW_AUTOSIZE );
imshow( "Gray image", gray_image );
waitKey(0);
return 0;
}
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編譯時的指令:
$ g++ main.cpp -o main -I/opt/local/include -L/opt/local/lib -lopencv_core.2.4.10 -lopencv_highgui.2.4.10 -lopencv_imgproc.2.4.10