opencv下调整图片大小并保存

cvSaveImage()这个第一个参数，我用的是绝对路径才能正确的保存修改后的图片

#include <opencv/cxcore.h>
#include <opencv/highgui.h>
#include <opencv2\opencv.hpp>
#include <iostream>
#include <cstdlib>
using namespace std;

#pragma comment(lib, "opencv_core242d.lib")
#pragma comment(lib, "opencv_highgui242d.lib")
#pragma comment(lib, "opencv_objdetect242d.lib")
#pragma comment(lib, "opencv_imgproc242d.lib")  


void scaleImage(IplImage* srcimg,IplImage* &tarimg,int width,int height);

// width,hight分别对应argv[3],argv[4]

int main(int argc,char* argv[])
{
	IplImage* image = NULL;
	image = cvLoadImage(argv[1]);
	IplImage* newImage=NULL;
	int newWidth = atoi(argv[3]);
	int newHeight = atoi(argv[4]);
	scaleImage(image,newImage,newWidth,newHeight);
	cvNamedWindow("windows");
	cvShowImage("windows",image);
	// 64 * 128
	cvWaitKey();
	cvSaveImage(argv[2],newImage,0); 
    cvDestroyWindow("windows");  
    cvReleaseImage(&image);  
    
	return 0;
}

void scaleImage(IplImage* srcimg,IplImage* &tarimg,int width,int height)
{
	CvSize tarimg_cvsize;
	tarimg_cvsize.width=width;
	tarimg_cvsize.height=height;
	tarimg  = cvCreateImage( tarimg_cvsize,srcimg->depth,srcimg->nChannels);
	cvResize(srcimg,tarimg,CV_INTER_LINEAR);
}