LearningOpenCV中的命令行参数 learning opencv 2nd

例2.1

#include"highgui.h"

int main( int argc, char**argv)//不要被命令行参数吓倒

{

IplImage* img =cvLoadImage(argv[1]);

cvNamedWindow("Example1", CV_WINDOW_AUTOSIZE );

cvShowImage("Example1", img );

cvWaitKey (0);

cvReleaseImage(&img );

cvDestroyWindow("Example1");

return 0;

}

在这里argc=2，argv[0]=”ch2_ex2_1.exe”,argv[1]=”img.jpg”

程序运行过程：

（1）win+R，输入cmd,确定

（2）切换路径CD C：UserDQADesktopDebug

（3）输入ch2_ex2_1.exe img.jpg

代码改进：

#include"iostream"

#include"highgui.h"

using namespacestd;

int main( int argc, char**argv)

{

IplImage* img =cvLoadImage(argv[1]);

cout<<"argc="<<argc<<"n"<<"argv[0]="<<argv[0]<<"n"<<"argv[1]="<<argv[1]<<endl;

cout<<"img->height="<<img->height<<"n"<<"img->width="<<img->width<<"n"

<<"img->widthStep="<<img->widthStep<<"n"<<"img->nChannels="<<img->nChannels<<endl;

cvNamedWindow("Example1", CV_WINDOW_AUTOSIZE);

cvShowImage("Example1", img );

cvWaitKey(0);

cvReleaseImage(&img);

cvDestroyWindow("Example1");

return 0;

}

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